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WO2007068182A1 - 650nm plastic optical fiber transmission system - Google Patents

650nm plastic optical fiber transmission system Download PDF

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Publication number
WO2007068182A1
WO2007068182A1 PCT/CN2006/003193 CN2006003193W WO2007068182A1 WO 2007068182 A1 WO2007068182 A1 WO 2007068182A1 CN 2006003193 W CN2006003193 W CN 2006003193W WO 2007068182 A1 WO2007068182 A1 WO 2007068182A1
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WO
WIPO (PCT)
Prior art keywords
circuit
optical
optical fiber
interface
pin
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2006/003193
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English (en)
French (fr)
Inventor
Guilan Qiao
Lishan Miao
De Jun Miao
Rongyan Xu
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Individual
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Individual
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Publication of WO2007068182A1 publication Critical patent/WO2007068182A1/zh
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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/25—Arrangements specific to fibre transmission

Definitions

  • the present invention relates to a network device, and more particularly to a user terminal device of an optical network, that is, a commonly used "last mile" user terminal device.
  • the existing quartz fiber network information on the main line must be optical/electrical, electric/optical when accessing the user terminal. This conversion process not only affects the transmission speed, but also causes signal attenuation, information distortion, and is susceptible to external interference. It is also prone to information theft.
  • the object of the present invention is to provide a 650 nm plastic optical fiber transmission system with fast, stable and safe signal transmission for end users.
  • the invention mainly comprises a wavelength converter, an optical switch and an optical network card for converting a 1550 nm or 1310 nm or 8501 m quartz optical fiber signal into a 650 nm plastic optical fiber signal, and the wavelength conversion, the optical switch, and the optical network card sequentially pass the information transmission rate of 100 Mbps. Plastic fiber optic connection.
  • the invention develops a plastic optical fiber with an information transmission rate of 100 Mbps and a working wavelength of 650 nm, and the wavelength converter can realize single mode and multimode.
  • the fiber-optic signal converts the 1550nm, 1310nm, and 850nm quartz fiber signals into 650nm plastic fiber signals, and the transmission distance is more than 50m.
  • the optical network card data transmission mode is optical/optical transmission, which replaces the current network card's optical/electrical, electric/light. Data transfer mode.
  • the optical switch is a switching node in the all-optical network, and is an indispensable device in a high-speed, large-capacity data transmission system, and can be used to interconnect different optical transmission networks in a wide area.
  • the invention always exists in the form of light when the optical information stream is transmitted and exchanged in the network, without having to undergo optical/electrical, electrical/optical conversion, and has good transparency, wavelength routing characteristics, compatibility and scalability. It has the characteristics of light weight, good toughness, easy interface, low comprehensive cost, good security performance, strong anti-interference ability, high transmission rate and low light source. It is the key to solving the last mile of information "all-optical network" and is also realized in the future. The best choice for triple play is the first choice for next-generation high-speed (ultra-high speed) broadband networks.
  • the invention also concatenates at least one optical repeater on a continuous plastic optical fiber.
  • the signal When the optical transmission distance exceeds 50 meters, in optical network communication, the signal will be attenuated during the non-ideal channel transmission. Therefore, it must be amplified to transmit it further, and the optical signal will be transmitted. make up.
  • the invention also connects the photoelectric converter through the plastic optical fiber on the optical switch, and the other end of the photoelectric converter is connected to the five types of wires.
  • a computer that still uses existing Ethernet cards of various specifications can be connected to the all-optical network system, and a high information transmission rate can be obtained through the all-optical network, and the plastic optical fiber system can be effectively intercommunicated with the public information network to perform light throughout the entire network. Communication.
  • the wavelength converter includes a power supply circuit supplied to the whole system, a V25806 quartz optical fiber interface control circuit, a TODX2402 plastic optical fiber interface control circuit, two dielectric conversion control cores DM9331A, and a crystal oscillator circuit; the vibration-vibration circuit is connected to the power supply circuit, and the vibration-vibration circuit is further Two medium conversion control chips DM9331A are respectively connected, two medium conversion control chips DM9331A are connected to each other, and each medium conversion control chip DM9331A is respectively connected with V25806 quartz optical fiber interface control circuit and TODX2402 plastic optical fiber interface circuit. Wavelength converters are key components in all-optical networks.
  • OBH-type wavelength converters are used in plastic optical fiber systems to integrate all-optical networks where 650nm optical wavelengths are converted to other optical wavelengths (1550nm ; 1310nm ; 850nm). In order to interconnect with other optical wavelengths (1550nm; 1310nm; 850nm) of quartz fiber.
  • the plastic optical fiber system and the public information network can be intercommunicated to perform optical communication throughout the entire network.
  • the optical switch includes two main control boards with the switch chip KS8999 as the core.
  • the two main control boards are connected in parallel through the medium independent interface to form a 16-way switching system.
  • Each chip KS8999 is integrated with eight physical layer transceivers.
  • Each chip KS8999 has the following control and service function blocks: flow control, VLAN, priority processing, MAC lookup engine in 1K space, queue priority management, buffer management, 8 access controllers, 8 physical layer transceivers , E2PROM processor interface, LED working status display, ⁇ /SM dedicated external interface, MAC interface.
  • the optical switch uses an switched connection transport over Ethernet frames with optical interfaces at 650 nm optical wavelength, allowing individual users to share Internet access in a single LAN, and a single product can provide broadband Internet access for up to 96 users. And, you can connect to meet the needs of more users.
  • the 650nm optical wavelength Fast Ethernet port of the optical switch can provide a dedicated link to the end user with a 650nm optical interface NIC PC, or connect another Ethernet switch/hub in front of the end user for shared sharing.
  • the switch provides 100 Mbps of full-duplex configuration bandwidth for each end user, thus completely eliminating the bottleneck of dial-up access. Thanks to the optical interface, the configuration bandwidth is unobstructed enough to handle the most demanding environments.
  • Ethernet switch devices support LEEE802.3X adaptive transmission mode, or select the best transmission rate, even in the case of overload, can maintain the maximum data integrity of storage and forwarding switching and flow control, flow control Adaptation also enables the switch to automatically prevent the port cache from becoming saturated.
  • the optical network card is mainly composed of an IH00A main control chip, a PCI interface circuit with a bus width of 32 bits connected to the IP100A main control chip, a voltage conversion circuit, a fiber optic module interface circuit with a supply voltage of +3.3, an EEPROM memory, indicating data reception and transmission.
  • the indicator circuit is composed of a 25MHz crystal oscillator circuit for the clock source of the main control chip.
  • the optical network card is used in a computer terminal, and is interconnected by an optical fiber and an Internet. It has all the features of a general-purpose network card, takes advantage of the excellent features of the PIC bus and uses the bus master's working mode.
  • ACPI Advanced Configuration and Power Interface
  • the I/O interface is a 650 nm plastic optical fiber (POF) optical interface.
  • the optical repeater is mainly composed of two optical transceiver modules, a DC/DC converter that supplies operating voltage for the optical transceiver module, and an AC/DC converter.
  • Optical repeaters use a 650 nm optical relay where the distance is too long in a plastic optical fiber system integrated all-optical network.
  • This product provides high-speed access network to achieve "fiber-to-the-home" all-optical transmission, providing a new generation of short-distance, high-bandwidth network transmission system that can meet technical requirements and reduce costs, and has important application value.
  • the optical repeater is mainly composed of a power conversion circuit, a fiber transceiver module power processing circuit, a fiber transceiver module IPi control circuit, and a fiber transceiver module JP 2 control circuit.
  • the power conversion circuit includes a 220V AC voltage converted into a +5V DC voltage circuit, and the optical fiber transceiver
  • the module power processing circuit is connected to the +5V DC voltage output circuit, and the fiber transceiver module ⁇ control circuit and the fiber transceiver module IP 2 control circuit are respectively connected to the output end of the corresponding fiber transceiver module power processing circuit, and the input end of the fiber transceiver module IPt And the output end is respectively connected to the output end and the input end of the optical transceiver module ⁇ > 2 .
  • the photoelectric converter includes a power supply circuit, an optical interface circuit, an electrical interface circuit, which are supplied to the entire system, Two medium conversion control chip DM9331A, crystal oscillator circuit; crystal oscillator circuit is connected to the power supply circuit, the crystal oscillator circuit is respectively connected with two medium conversion control chips DM9331A, two medium conversion control chips DM9331A are connected to each other, and each medium conversion control chip DM9331A They are respectively connected to the optical interface circuit and the electrical interface circuit.
  • a photoelectric conversion system consisting of two pieces of I) M9331A. They are connected to common Category 5 cable and 650nm plastic fiber through the ST88616 Category 5 TP electrical interface circuit and TODX2402 fiber interface circuit.
  • the crystal oscillator circuit provides a clock source for the medium conversion chip.
  • the medium conversion control chip DM9331A is a low-power, high-performance CMOS chip with all physical layer functions conforming to the IEEE802.3u standard, including the physical coding sublayer (PCS).
  • PECL compatible interface for fiber optic modules it can automatically select full-duplex/half-duplex working mode, etc., to realize the conversion of optical signals of different wavelengths to 650nm optical signals, which can provide twisted pair (five-category line)
  • the cable is connected directly to the 100Base-Tx Fast Ethernet interface and can also be connected to an external fiber transceiver via the PECL interface.
  • FIG. 1 is a working principle diagram of the present invention
  • FIG. 2 is a block diagram of a wavelength converter
  • FIG. 3 is a circuit schematic diagram of a wavelength converter
  • FIG. 4 is a circuit schematic diagram of a wavelength converter
  • Figure 3 is the circuit schematic diagram of the converter
  • Figure 6 is the circuit schematic diagram of the wavelength converter
  • Figure 7 is the circuit diagram of the wavelength converter
  • Figure 8 is the schematic diagram of the optical switch
  • Figure 9 is the optical switch
  • Figure 10 is the circuit schematic diagram of the optical switch
  • Figure 1 is the circuit schematic diagram of the optical switch
  • Figure 12 is the circuit schematic diagram of the optical switch
  • Figure 13 is the optical switch
  • Figure 5 is a circuit schematic diagram of the optical switch
  • Figure 15 is a schematic diagram of the display circuit of the optical switch
  • Figure 16 is a structural block diagram of the optical network card
  • Figure 1 is one of the circuit schematic diagrams of the optical network card
  • Figure 18 is the circuit schematic diagram of the optical network card
  • Figure 19 is the circuit schematic diagram of the optical network
  • the optical switch is connected to the repeater through a plastic optical fiber with an information transmission rate of 100 Mbps, and the plastic optical fiber is connected to 14 wavelength converters.
  • Each of the wavelength converters passes through 1550 nm or 13 1 Onm or 850 nm quartz.
  • the optical fibers are connected to optical network cards of computer terminals 3 to 16.
  • the optical switch also connects the optical network cards of the computer terminals 1 and 2 through plastic optical fibers, repeaters, and plastic optical fibers.
  • the optical switch is connected to the common network card of the computer of various specifications of the Ethernet card through the plastic optical fiber and the photoelectric converter and the Category 5 cable.
  • the wavelength converter includes a power supply circuit supplied to the entire system, a V25806 quartz optical fiber interface control circuit, a TODX2402 plastic optical fiber interface control circuit, and two medium conversion control chips DM9331A.
  • Crystal oscillator circuit crystal oscillator circuit is connected to the power supply circuit, the crystal oscillator circuit is respectively connected with two medium conversion control chips DM9331A, two medium conversion control chips DM9331A are connected to each other, and each medium conversion control chip DM9331A and V25806 quartz optical fiber interface control circuit respectively , TODX2402 plastic optical interface circuit control connection.
  • Two media conversion control chips, the DM9331A are also connected to the LED driver circuit.
  • the crystal oscillator circuit is connected to the +3.3V output of the DC/DC converter, and the AC/DC power converter is externally connected to 220V AC.
  • the AC/DC power converter converts 220V AC into a +5V DC output.
  • the output is connected to the input of the DC/DC converter, and the DC/DC converter is also connected to two media conversion control chips DM9331A.
  • the plastic optical fiber interface control circuit includes a medium conversion control chip DM9331AN4, an optical module power supply circuit connected to the medium conversion control chip DM9331AN4, a semi-full duplex conversion circuit, an indicator circuit, and a plastic optical interface circuit.
  • the plastic optical fiber interface circuit is mainly composed of TOSHIBA's optical transceiver module TODX2402, which constitutes 8 data input/output channels on the physical layer of the switch, and connects the bidirectional data to the RX+/FXRD+ of the dielectric conversion chip DM933 1 A, RX-/ FXRD, TX+ FXTD+,, ⁇ -ZFXT'D-, and other four I/O pins independently realize the transmission and reception of optical signals under the control of the FXSD1 signal.
  • the port When the voltage value of the optical signal detection pin FXSD18 of the optical switch chip is greater than 0.6V, the port operates in 100BaseFX mode, and when 0.6V ⁇ VFXSDn ⁇ 1.25V, FXSDn is low, and the optical signal connection indicates "off”. : When VFXSDn>1.25V, FXSDn is high and the optical signal connection indicates "lighting".
  • the quartz optical fiber interface control circuit includes a medium conversion control chip DM9331AN2, a voltage conversion circuit connected to the medium conversion control chip DM9331AN2, a semi-full duplex conversion circuit, an indicator light circuit, and a quartz optical fiber interface circuit.
  • Two working status indicators show the dynamic operating status of the optical wavelength converter, such as data transmission, error conditions, and so on.
  • D1AG—ST 1 represents the successful connection of the light;
  • 0 represents the failure of the connection of the fiber. Used for automatic loopback testing.
  • FX_LINK/ACT one connection or activity indicator.
  • Optical transceiver module TODX2402 and media conversion chip DM9331 ⁇ signal interface is 3.3 volt PECL interface.
  • the optical switch consists of a power supply circuit, a main control chip KS8999-208, a filter circuit, a 25MHz crystal oscillator circuit, and eight sets of plastic optical fiber interface circuits.
  • the power supply circuit includes a 220V AC voltage to a +5V DC voltage circuit, a +5V DC voltage to a +3.3V DC voltage circuit, and a +5V DC voltage to a +2.0V DC voltage circuit.
  • the above two transformer circuits are respectively MIC29302BT stabilized. Pressure device.
  • the filter circuits are respectively connected to the output terminals of the +2.0V DC voltage, and each group of plastic optical fiber interface circuits is composed of an integrated circuit TODX2402 and an auxiliary circuit.
  • the integrated circuit TODX2402 pin 1 and the foot 11, 12, 13, 14 are grounded, the foot 2 is connected to the foot 196 of the main control chip KS8999-208 through the capacitor d, and the foot 3 is connected to the main control chip KS8999-208 through the capacitor C2.
  • Pin 1 97, pin 4 is connected to pin 190 of transistor V!, V 2 resistor R 9 , R 10 , Ru, Ri2 Ria master chip KS8999_208, pin 5, pin 7 is connected to +3.3V DC voltage power supply, foot 6 then VCCT1, pin 8 ⁇ connected through capacitor C 4 200 feet KS8999_208 master chip, the master chip connected to pin 93 by a pin 199 a capacitance C KS8999 208.
  • the integrated circuit TODX2402 pin 1 and the foot 1 1 , 1 2 , 1 3 , 1 4 are grounded, the foot 2 is connected to the foot 206 of the main control chip KS8999_208 through the capacitor C 7 , and the foot 3 is connected to the main control through the capacitor C 8
  • the pin 207 of the chip KS8999-208, the pin 4 is connected to the pin 191 of the main control chip KS8999-208 through the R3 ⁇ 4 resistor R 21 , the transistor V 3 , the 1 ⁇ 4 , the resistor R 22 , the R 23 , the R 24 , the R 25 , the R 26 . 5, pin 7 connected to +3.3 V DC voltage source, connected to pin 6 VCCT2, KS8999_208 pin 8 connected to the master chip via the capacitor C 204 of 6 feet, 9 feet pin 203 KS8999 a control chip 208 via the capacitor C 5.
  • the integrated circuit TOD ⁇ 2402 pin 1 and pin 1 1 , 1 2, 1 3, 14 are grounded.
  • the pin 2 is connected to the pin 5 of the main control chip KS8999__208 through the capacitor C 9 , and the pin 3 passes through the capacitor C 1 ( ) connected to the master
  • the pin 6 of the chip KS8999-208, the pin 4 is connected to the pin 192 of the main control chip KS8999-208 through the resistor R 34 , the transistors V 5 , V 6 , the resistors R 35 , R 36 , R 37 , R 38 , R 39 .
  • foot 7 is connected to +3.3V DC voltage power supply
  • foot 6 is connected to VCCT3
  • pin 8 ⁇ capacitor C 12 is connected to the foot 1 0 of the main control chip KS8999-208
  • pin 9 is connected to the foot of the main control chip KS8999-208 through the capacitor Cogni 9.
  • the plastic optical fiber 4 in the interface circuit IC TODX2402 pins 1 and 11, 12, 13, 14 to ground, pin 2 connected to the master chip KS8999_208 foot via the capacitor C 15 22, pin 3 connected via a capacitor C 6 208 a master chip KS8999
  • the foot 23, the foot 4 is connected by the power
  • the integrated circuit ⁇ 2402 pin 1 and the foot 11, 1 2, 1 3, 14 are grounded, the foot 2 is connected to the foot 30 of the main control chip KS8999-208 through the capacitor C 17 , and the foot 3 is connected to the main control through the capacitor C 18 Chip KS8999-208 pin 3 1, pin 4 through the electrical 3 ⁇ 4 Rgo, transistor V 9 , V 10 .
  • the resistors 1 ⁇ , 2, 3 , R64, 5 are connected to the foot 68 of the master chip KS8999-208, the foot 5, the foot 7 connected to + 3.3V DC voltage source, connected to pin 6 VCCT5, pin 8 ii capacitance C 2 o KS8999- 208 connected to main chip 34 feet, 9 feet by 3,319 feet capacitor C connected to the master chip KS8999- 208.
  • the integrated circuit TODX2402 pin 1 and pin 1 1 , 1 2, 1 3, 14 are grounded, the pin 2 is connected to the pin 47 of the main control chip KS8999_208 through the capacitor C 23 , and the pin 3 is connected to the main control chip through the capacitor C 24
  • the foot 48 of the KS8999_208, the foot 4 is connected to the leg 69 of the main control chip KS8999-208 through the electric R 73 , the transistors Vu, V 12 , the resistors R 74 , R 75 , R 76 , R 77 , R 78 , the feet 5 and 7 then + 3.3V DC voltage source, connected to pin 6 VCCT6, pin 8 ii capacitor C 22 connected to a control chip 208 KS8999 44 feet, 9 feet by capacitance C KS8999- 208 feet 43 21 master chip bonding.
  • the integrated circuit TODX2402 pin 1 and the foot 11, 12, 13, 14 are grounded, the foot 2 is connected to the pin 54 of the main control chip KS8999-208 through the capacitor C 25 , and the pin 3 is connected to the main control chip KS8999 through the capacitor C 26
  • the foot 55 of the 208, the foot 4 is connected to the foot 70 of the main control chip KS8999-208 through the electric 6
  • the transistors V 13 , V 14 , the resistors 7 , 8 , 9 , R 9 o , R 91 , and the legs 5 and 7 are connected + 3.3V DC voltage source, connected to pin ⁇ VCCT7, pin 8 ii capacitor C 28 connected to the master chip KS8999-208 58 feet, 9 feet pin KS899 a control chip 57 via the capacitor 2089 C 27.
  • the integrated circuit TODX2402 pin 1. and the foot 11, 12, 13, 14 are grounded, the foot 2 is connected to the foot 64 of the main control chip KS8999-208 through the capacitor C 31 , and the foot 3 is connected to the main control chip through the capacitor C 32
  • the 25MHz crystal oscillator circuit is connected to pins 176 and 177 of the master chip KS8999_208.
  • the connectors XP1 and XP2 are flat cable sockets FC20P, V r32 is a green LED, and V 33 is a red LED.
  • the optical network card voltage conversion circuit includes: a +5V DC voltage to +3.3V DC voltage DC-DC conversion circuit.
  • the converted +3.3V is mainly used to supply various chips and fiber interface circuits on the network card.
  • the voltage conversion circuit of the optical network card includes a +5V voltage power supply +3.3V voltage power supply circuit and +3.3V
  • the voltage power supply is turned to a +2.5V voltage power supply circuit, and a filter analog power supply circuit and a digital power supply circuit are respectively disposed at the +5V voltage output terminal and the +3.3V voltage output terminal.
  • the IP100A master chip is a single-chip, full-duplex, 10M 1 100M adaptive Ethernet MAC+PHY, EEEE802.3 compliant, adapts to 10000-TX/100BASE-FX 10BASE-T, and has a 32-bit PCI interface.
  • the chip is available in a 128-pin PQFP package.
  • the power supply circuit of the fiber optic module interface is connected to the +5V power supply voltage output terminal of the PCI interface via the filter circuit, and the +5V power input end of the voltage conversion circuit is connected to the A side of the PCI interface 5, 8, 61, 62 and B face 5 6, 6, 1, 1, 62.
  • the EEPROM memory pins 6 and 8 are connected to the +3.3V voltage supply of the PCI interface.
  • the pin 1 is connected to the pin 28 of the IP100A main control chip, the pin 2 is connected to the pin 17 of the IPI00A main control chip, and the pin 3 and the IP100A are controlled.
  • the pin 18 of the chip is connected, the pin 4 is connected to the leg 22 of the EP100A main control chip, and the pin 5 is grounded.
  • the pins 3, 7, and 8 of the BOOTROM memory are connected to the +3.3 V voltage power output of the PCI interface.
  • the pin 1 is connected to the pin 27 of the IP100A main control chip
  • the pin 2 is connected to the pin 22 of the IP100A main control chip
  • the pin 4 is grounded.
  • the pin 5 is connected to the pin 18 of the IH00A main control chip
  • the pin 6 is connected to the pin 17 of the IP100A main control chip.
  • the indicator circuit for instructing data reception and transmission comprises an LED light-emitting diode and a circuit in which the resistors are serially connected, and two LED light-emitting diodes LED ⁇ LED 2 are respectively connected in parallel to the +3.3V power supply voltage output end of the PCI interface, and the light-emitting diode
  • the LE series resistor is connected to the pin 21 of the IP100A master chip, and the resistor R 2 in series with the LED LED 2 is connected to the pin 16 of the IP100A master chip.
  • the input terminal XTALj of the 25MHz crystal oscillator circuit is connected to the pin 32 of the IPI00A main control chip, and the output terminal XTAL 2 is connected to the pin 31 of the IP100A main control chip.
  • the optical repeater consists of two fiber transceiver modules, DC/DC converters and AC/DC converters, and power indicator LEDs.
  • the invention is provided with a 220V AC voltage converted into a +5V DC voltage circuit, a fiber transceiver module power supply processing circuit, a fiber transceiver module IP! control circuit and a fiber transceiver module 3 ⁇ 4 control circuit.
  • the fiber transceiver module power processing circuit is connected to the +5V DC voltage output circuit, and the fiber transceiver module ⁇ control circuit and the fiber transceiver module ⁇ > 2 control circuit are respectively connected to the output end of the corresponding fiber transceiver module power processing circuit, and the fiber transceiver module IPi The input end and the output end are respectively connected to the output end and the input end of the optical transceiver module IP 2 .
  • the optical transceiver module lPi control circuit and the optical transceiver module EP 2 control circuit are respectively composed of analog integrated circuits N1, N2 and peripheral circuits.
  • the analog integrated circuits N1 and N2 are TODX2404 or TODX2402 analog integrated circuits.
  • the analog ICs N1, N2, pin 1, pin 9, pin 11, 12, 13, 14 are grounded respectively, the pin 5 is connected to +5V DC voltage, and the analog integrated circuit N1 pin 2 is connected with the analog integrated circuit N2 pin 9.
  • the analog integrated circuit N1 pin 3 is connected to the analog integrated circuit N2 pin 8.
  • the pin 8 of the analog integrated circuit N1 is connected to the pin 3 of the analog integrated circuit N2, and the pin 9 of the analog integrated circuit N1 is connected to the pin 2 of the analog integrated circuit N2. .
  • the pin 6 of the analog integrated circuit N1 is connected to the +5 ⁇ DC voltage output terminal through the inductor 1 and the inductor! 2, and the other end of the capacitor ⁇ ⁇ ends are also connected to the capacitor and the capacitor C are respectively connected to the pin 1, 2 and between the capacitance C 2 and the inductor, the other end of the resistor and the parallel resistance R 2 feet, respectively,
  • Pin 3 is connected
  • pin 7 is connected to +5V DC voltage output terminal
  • pin 7 and pin 8 are connected to resistor R 5
  • pin 7 and pin 8 are connected in series with resistor and capacitor C 3
  • pin 7 and pin 9 are connected to each other.
  • R 7 , foot 9 also passes the resistor Rg is grounded, and capacitor C 3 and capacitor C4 are connected in parallel between the ground terminal and the inductor ⁇ .
  • the resistor R 9 is connected between the pin 2 and the pin 1 of the analog integrated circuit N2, and the resistor Rn is connected between the pin 3 and the pin 1.
  • the pin 6 of the analog integrated circuit N2 is connected to the +5V DC voltage output terminal through the inductor L 2 , the inductor L
  • the two ends of the two are respectively connected to the capacitor C 5 and the capacitor C 6
  • the other ends of the capacitors C 5 and C 6 are respectively connected to the pin 1
  • the resistors R 1() and R 12 are connected in parallel between the capacitor C 6 and the inductor L 2 .
  • the other ends of the resistors R 1() and R 12 are respectively connected to the legs 2 and 3, the leg 7 is connected to the +5 V DC voltage output terminal, and the leg 7 and the pin 8 are connected between the resistor R 13 and the leg 7 and the leg 8
  • the resistor R 14 and the capacitor C 7 are also connected in series, the resistor R 15 is connected between the leg 7 and the leg 9, the pin 9 is also grounded through the resistor R 16 , and the capacitor C 7 and the capacitor C 8 are also connected in parallel between the ground terminal and the inductor L 2 .
  • + 5V DC voltage output of the power converter circuit is connected to the power supply circuit indicator, power indicator circuit by the light emitting diode LED and the resistor R 17 in series, the positive terminal of the light emitting diode LED is connected to the + 5V DC voltage output terminal of the power conversion circuit, One end of the resistor R 17 is grounded.
  • 650nm Ethernet switches A and B If there are two 650nm Ethernet switches A and B to be interconnected, and the distance between the two is 80m, then there is no direct interconnection. It is necessary to add a 650nm optical repeater, and a pair of 40m long 650nm polymer fiber will be used.
  • the external line transceiver end of switch A is connected to the optical port 1 (or optical port 2) of the transceiver end of the 650 nm optical repeater.
  • the external line transceiver end of switch B and the 650 ml optical repeater are connected by a pair of 650 nm polymer fiber with a length of 40 m.
  • the other transceiver port 2 (or optical port 1) is connected, thus completing the interconnection of two 650nm Ethernet switches.
  • the RJ45 interface of the photoelectric converter consists of a dielectric conversion control chip DM9331 A N3 and a TP interface circuit connected to N3, a crystal oscillator circuit, an automatic, full-duplex selection indicating circuit, and a transformer circuit.
  • the power supply circuit of the photoelectric converter includes two parts:
  • the second is a DC/DC converter circuit with +5v DC voltage to +3.3V DC voltage.
  • the converted +3.3V is mainly used to supply the chip DM9331 and the fiber interface circuit. Set the 2.2uH inductor and filter capacitor between the ground of the power supply.
  • the indicator circuit consists of a resistor and a series of LEDs.
  • the optical signal interface circuit is composed of a medium conversion control chip DM9331 N2 and an optical interface circuit connected with N2, an optical module power supply circuit, an optical module direction converter, a semi-full duplex conversion and an indication circuit, and the optical interface circuit is connected by a connector TODX2402 and a resistor. composition.
  • An indicator circuit is also provided on the optical signal interface circuit.
  • the optical conversion control chip N2 of the optical signal interface circuit is connected to the 50 MHz crystal power supply output terminal.
  • the pin 17 of the chip N2 is connected to the pin 14 of the chip N3, the leg 19 of the chip N2 is connected to the leg 28 of the chip N3, the leg 20 of the chip N2 is connected to the leg 29 of the chip N3, the leg 21 of the chip N2 and the leg of the chip N3.
  • the pin 24 of the chip N2 is connected to the pin 24 of the chip N3
  • the leg 25 of the chip N2 is connected to the leg 25 of the chip N3
  • the leg 26 of the chip N2 is connected to the leg 17 of the chip N3, and the pin 28 and the chip of the chip N2
  • the leg 19 of the N3 is connected
  • the leg 29 of the chip N2 is connected to the leg 20 of the chip N3
  • the leg 37 of the chip N2 is connected to the leg 21 of the chip N3
  • the leg 40 of the chip N2 is connected to the leg 40 of the chip N3.
  • the TXEN end of one medium conversion control chip DM9301A is cross-connected with the RXDV end of another medium conversion control chip DM9301A, and the RXD end of one media conversion control chip DM9301A is cross-connected with the TXD end of another media conversion control chip DM9301A, two The FXRD end and the FXTD end of the media conversion control chip DM9301A are externally connected.
  • Two media conversion control chips The OSCIN terminal of the DM9301A is connected to the 50MHz crystal power supply output.
  • Optical fiber transceiver interface circuit Mainly composed of TOSHIBA's optical transceiver module TODX2402, which constitutes 8 data input/output channels on the physical layer of the switch, and connects the bidirectional data to RX+/FXRD+, RX-/FXRD of the media conversion chip DM9331.
  • TOSHIBA's optical transceiver module TODX2402 which constitutes 8 data input/output channels on the physical layer of the switch, and connects the bidirectional data to RX+/FXRD+, RX-/FXRD of the media conversion chip DM9331.
  • TX+/FXTD+, , TX-/FXTD-, and other four I/O pins independently transmit and receive optical signals under the control of the FXSD1 signal.
  • the port When the voltage value of the optical signal detection pin FXSD18 of the optical switch chip is greater than 0.6V, the port operates in 100BaseFX mode, and when 0.6V ⁇ VFXSDn ⁇ 1.25V, FXSDn is low, and the optical signal connection indicates "off”. When VFXSDn>1.25V, FXSDn is ⁇ level, and the optical signal connection indication is “lighted up”.
  • the photoelectric converter displays the dynamic working state of the photoelectric converter through two working status indicators, such as data transmission and error conditions.
  • LENK/Acl Connection or activity indicator. .
  • the signal interface of the optical transceiver module TODX2402 and the media conversion chip DM9331 A is 3.3 volt PECL interface.

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Description

650nm塑料光纤传输系统 技术领域
本发明涉及一种网络设备， 尤其是一种光网络的用户终端设备， 也就是通 常俗称的 "最后一公里"用户终端设备。
背景技术
现有主干线上的石英光纤网络信息在接入用户终端时必须经光 /电、 电 /光变 换， 这种换转过程不但影响传输速度， 而且导致信号衰减、 信息失真， 易受外 界干扰， 还易出现信息被盗。
发明内容
本发明目的在于为终端用户提供一种信号传输快、 稳定、 安全的 650nm塑 料光纤传输系统。
本发明主要由将 1550nm或 1310nm或 8501m石英光纤信号转换成 650nm 塑料光纤信号的波长转换器、 光交换机、 光网卡组成， 波长转换器、 光交换机、 光网卡之间依次通过信息传输速率为 100Mbps的塑料光纤连接。
本发明根据塑料光纤特征参数、 谱损、 折射率分布等参数研制出相配套的 光接入系统用信息传输速率为 100Mbps、 工作波长为 650nm的塑料光纤， 波长 转换器可以实现单模、 多模的光纤信号， 将 1550nm、 1310nm、 850nm石英光 纤信号分别转换成 650nm塑料光纤信号， 传输距离达 50m以上； 光网卡数据传 输方式为光 /光传输， 替代现行网卡的光 /电、 电 /光的数据传输模式。 光交换机 是全光网络中的交换节点， 是高速、 大容量数据传输系统中不可缺少的器件， 借助它可以广域地互连不同的光传输网。 本发明是光信息流在网络中的传输及 交换时始终以光的形式存在，而不必经过光 /电、电 /光变换，具有良好的透明性、 波长路由特性、 兼容性和可扩展性， 具有重量轻、 韧性好、 接口容易， 综合成 本低、 保密性能好、 抗干扰能力强、 传输速率高、 光源便宜等特点， 是解决信 息 "全光网"最后一公里的关键， 也是未来实现 "三网合一"的最佳选择， 更 是下一代高速 (超高速)宽带网络的首选。
本发明还在连续的塑料光纤上串接至少一个光中继器。
当光传输距离超过 50米以上时， 光网络通信中， 信号在非理想的信道传输 过程中会产生衰减， 因此， 必须对其放大以使其传输得更远一些， 对光信号进 行會 g量补偿。
本发明在光交换机上还通过塑料光纤连接光电转换器， 光电转换器的另一 端连接五类线。
可将仍使用现有各种规格以太网卡的计算机连接到全光网系统， 并通过全 光网获得高信息传送速率， 并能使塑料光纤系统与公用信息网有效互通， 进行 全程全网的光通信。
波长转换器包括由供给整个系统的电源电路、 V25806石英光纤接口控制电 路、 TODX2402塑料光纤接口控制电路、 两个介质转换控制芯 DM9331A、 晶 振电路； 品振电路连接在电源电路上， 品振电路又分别与两个介质转换控制芯 片 DM9331A连接， 两个介质转换控制芯片 DM9331A相互连接， 每个介质转换 控制芯片 DM9331A分别与 V25806石英光纤接口控制电路、 TODX2402塑料光 纤接口电路控制连接。 波长转换器是全光网络中的关键器件， OBH型波长转换器作用在塑料光纤 系统集成全光网络中需要进行 650nm光波长与其他光波长 (1550nm; 1310nm; 850nm)相互转换的地方。 以便与其他光波长 （1550nm; 1310nm; 850nm) 的 石英光纤相互连接。 使塑料光纤系统与公用信息网能够互通， 进行全程全网的 光通信。
光交换机包括两块以交换芯片 KS8999为核心的主控板， 两块主控板通过 介质独立接口 ΜΠ并联构成一个 16路的交换系统； .每块芯片 KS8999上集成有 八个物理层收发器， 每块芯片 KS8999分别具有以下控制和服务功能块： 流量 控制、 VLAN、 优先权处理、 1K空间的 MAC査找引擎、 排队优先权管理、 缓 存区管理、 8个接入控制器、 8个物理层收发器、 E2PROM处理器接口、 LED 工作状态显示、 ΜΠ/SM专用外部接口、 MAC接口。
光交换机使用在以 650nm光波长为光接口的以太网帧的交换连接传输上， 使在一个局域网中各单独用户共享因特网访问,单个产品最多可为 96个用户提 供宽带因特网访问。 并且， 可以进行连接， 以满足更多用户的需求。 光交换机 的 650nm光波长快速以太网端口能提供专门的链接到带有 650nm光接口网卡 PC的终端用户， 或在终端用户前面连接另一个以太网交换机 /集线器， 用做共 享链接。 交换机对每个终端用户提供 1 00Mbps全双工的配置带宽,从而完全消 除拨号上网的瓶颈。 由于使用光接口， 使其配置带宽畅通无阻， 足以应付最严 酷的环境。
以太网交换机设备支持 LEEE802.3X自适应传输模式,或以选择最佳的传输 速率， 即使在超负载的情况下， 仍能维持存储和转发交换以及流量控制的最大 数据完整性， 流量控制的自适应亦能使交换机自动防止端口缓存变为饱和。
光网卡主要由 IH00A主控芯片、 与 IP100A主控芯片连接的总线宽度为 32 位的 PCI接口电路、 电压转换电路、 供电电压为 +3.3的光纤模块接口电路、 EEPROM存储器、 指示数据接收和发送的指示灯电路、 为主控芯片 供时钟源 的 25MHz晶振电路组成。
光网卡使用在计算机终端， 利用塑料光纤与 Internet网进行互连。 它具有通 用网卡的各种特性， 发挥 PIC总线的优良特性并采用总线主控的工作方式。 遵 循高级配置和电源接口中 （ACPI)特性， 通过硬件和操作系统提供支持系统的 电源管理功能。 I/O接口为 650nm塑料光纤（POF)光接口。
光中继器主要由两个光纤收发模块、 为光纤收发模块提供工作电压的 DC/DC变换器和 AC/DC变换器组成。
光中继器使用在塑料光纤系统集成全光网络中因距离太长需要进行 650 nm 光中继的地方。 本产品为高速接入网实现 "光纤到户"全光传输， 提供了一种 既能满足技术要求， 又能降低成本的新一代短距离、 高宽带网络传输系统， 具 有重要的应用价值。
光中继器主要由电源转换电路、 光纤收发模块电源处理电路、 光纤收发模 块 IPi控制电路和光纤收发模块 JP2控制电路组成， 电源转换电路包括 220V交 流电压转换成 +5V直流电压电路， 光纤收发模块电源处理电路连接在 +5V直流 电压输出电路上， 光纤收发模块 ΙΡι控制电路和光纤收发模块 IP2控制电路分别 连接在相应的光纤收发模块电源处理电路的输出端， 光纤收发模块 IPt的输入 端和输出端分别与光纤收发模块 Π>2的输出端和输入端相连接。
光电转换器包括由供给整个系统的电源电路、 光接口电路、 电接口电路、 两个介质转换控制芯片 DM9331A、 晶振电路； 晶振电路连接在电源电路上， 晶 振电路又分别与两个介质转换控制芯片 DM9331A连接， 两个介质转换控制芯 片 DM9331A相互连接， 每个介质转换控制芯片 DM9331A分别与光接口电路、 电接口电路连接。
以两片 I)M9331A为核心组成的光电转换系统。 它们分别通过 ST88616五 类线的 TP电接口电路和 TODX2402光纤接口电路， 连接到普通五类线电缆和 650nm塑料光纤。 晶振电路为介质转换芯片提供时钟源， 介质转换控制芯片 DM9331A是一个低功耗、 高性能的 CMOS芯片， 它具有符合 IEEE802.3u标准 的全部物理层功能， 主要包括物理编码子层 (PCS), 适用用于光纤模块的 PECL 的兼容接口， 能够自动选择全双工 /半双工工作模式等， 实现不同波长光信号到 650nm光信号的转换， 既可以提供与双绞线 （五类线）线缆在 100Base— Tx快 速以太网的直接接口， 也可以通过 PECL接口连接外部的光纤收发器。
附图说明
图 1为本发明的工作原理图； 图 2为波长转换器的构成框图； 图 3为波长 转换器的电路原理图之一； 图 4为波长转换器的电路原理图之二； 图 5为波长 转换器的电路原理图之三； 图 6为波长转换器的电路原理图之四； 图 7为波长 转换器的电路廪理图之五； 图 8为光交换机的原理框图； 图 9为光交换机的电 路原理图之一； 图 10为光交换机的电路原理图之二； 图 1 1为光交换机的电路 原理图之三； 图 12为光交换机的电路原理图之四； 图 13为光交换机的电路原 理图之五； 图 14为光交换机的电路原理图之六； 图 15为光交换机的显示电路 原理图； 图 16为光网卡的结构框图； 图 1 7为光网卡的电路原理图之一； 图 1 8 为光网卡的电路原理图之二； 图 19为光网卡的电路原理图之三； 图 20为光中 继器的组成原理框图； 图 21为光中继器电路原理图； 图 22为光电转换器的组 成框图； 图 23为光电转换器的电路原理图之一； 图 24为光电转换器的电路原 理图之二； 图 25为光电转换器的电路原理图之三； 图 26为光电转换器的电路 原理图之四。
具体实施方式
如图 1所示， 在光交换机上分别通过信息传输速率为 100Mbps的塑料光纤 连接中继器， 塑料光纤连接 14台波长转换器，每台波长转换器分别通过 1550nm 或 13 1 Onm或 850nm的石英光纤与计算机终端 3至 1 6的光网卡连接。
光交换机上还分别通过塑料光纤、 中继器、 塑料光纤连接计算机终端 1、 2 的光网卡。
光交换机通过塑料光纤与光电转换器、 五类线连接使用现有各种规格的以 太网卡的计算机的普通网卡上。
如图 2、 3、 4、 5、 6、 7所示， 波长转换器包括由供给整个系统的电源电路、 V25806石英光纤接口控制电路、 TODX2402塑料光纤接口控制电路、 两个介质 转换控制芯片 DM9331A、 晶振电路； 晶振电路连接在电源电路上， 晶振电路又 分别与两个介质转换控制芯片 DM9331A 连接， 两个介质转换控制芯片 DM9331A相互连接， 每个介质转换控制芯片 DM9331A分别与 V25806石英光 纤接口控制电路、 TODX2402塑料光纤接口电路控制连接。 两个介质转换控制 芯片 DM9331A分别还连接 LED驱动电路。
晶振电路连接在 DC/DC转换器的 +3.3V输出端， AC/DC电源转换器外接在 220V交流电上， 由 AC/DC电源转换器将 220V交流电转变成 +5V直流电输出， 其输出端连接在 DC/DC转换器的输入端， DC/DC转换器还分别与两个介质转 换控制芯片 DM9331A连接。
塑料光纤接口控制电路包括介质转换控制芯片 DM9331AN4、 与介质转换 控制芯片 DM9331AN4连接的光模块供电电路、 半全双工转换电路、 指示灯电 路、 塑料光纤接口电路。 塑料光纤接口电路以 TOSHIBA公司的光纤收发模块 TODX2402为主组成， 构成交换机物理层上的 8个数据输入 /输出通道， 将双向 数据连接到介貭转换芯片 DM933 1 A的 RX+/FXRD+, RX-/FXRD, TX+ FXTD+,， ΤΧ-ZFXT'D-,等 4个 I/O脚，在 FXSD1信号的控制下独立实现光信号的收发交换。
当光交换芯片的光信号检测引脚 FXSD18的电压值大于 0.6V时,该端口工作在 100BaseFX模式,且当 0.6V<VFXSDn<1.25V时, FXSDn为低电平,光信号连接指示 "熄灭"： 当 VFXSDn>1.25V时, FXSDn为高电平,光信号连接指示 "点亮"。
石英光纤接口控制电路包括介质转换控制芯片 DM9331AN2、 与介质转换 控制芯片 DM9331AN2连接的电压转换电路、 半全双工转换电路、 指示灯电路、 石英光纤接口电路。
两个工作状态指示灯显示光波长转换器的动态工作状态， 例如数据传输、 出错情况等。
DIAG一 STO—诊断状态输出， 当 DIAG一 ACT=1且处于 FX方式时，
D1AG— ST 1代表光线连接成功； =0代表^纤连接失败。 用于自动回环测试。
FX_LINK/ACT一连接或活动指示灯。
FX一; FAULTLED~FX模式下， 指示光纤信号错误。
光 收发模块 TODX2402和介质转换芯片 DM9331 Α的信号接口均为 3.3 伏 PECL接口。
如图 8至 1 5所示， 光交换机由供电电路、 一个主控芯片 KS8999—208、 滤 波电路、 25MHz晶振电路、 八组塑料光纤接口电路组成。
供电电路包括 220V交流电压转为 +5V直流电压电路、 +5V直流电压转为 +3.3V直流电压电路、 +5V直流电压转为 +2.0V直流电压电路， 上述两变压电路 中分别采用 MIC29302BT稳压器。
滤波电路分别连接在 +2.0V直流电压的输出端， 各组塑料光纤接口电路分 别由集成电路 TODX2402及辅助电路组成。
塑料光纤 1接口电路中集成电路 TODX2402脚 1和脚 11、 12、 13、 14接 地， 脚 2通过电容 d接主控芯片 KS8999一 208的脚 196， 脚 3通过电容 C2接主 控芯片 KS8999一 208的脚 1 97，脚 4通过 ¾Ε 、晶体管 V!、 V2 电阻 R9、 R10、 Ru、 Ri2 Ria 主控芯片 KS8999_208的脚 190 接， 脚 5、 脚 7接 +3.3V直流 电压电源， 脚 6接 VCCT1, 脚 8 ίί过电容 C4接主控芯片 KS8999_208的脚 200， 脚 9通过电容 C3接主控芯片 KS8999一 208的脚 199。
塑料光纤 2接口电路中集成电路 TODX2402脚 1和脚 1 1、 1 2、 1 3、 1 4接 地， 脚 2通过电容 C7接主控芯片 KS8999_208的脚 206， 脚 3通过电容 C8接主 控芯片 KS8999一 208的脚 207， 脚 4通过 ι¾阻 R21、 晶体管 V3、 ¼、 电阻 R22、 R23、 R24、 R25、 R26与主控芯片 KS8999—208的脚 191连接， 脚 5、 脚 7接 +3.3 V 直流电压电源， 脚 6接 VCCT2, 脚 8通过电容 C6接主控芯片 KS8999_208的脚 204, 脚 9通过电容 C5接主控芯片 KS8999一 208的脚 203。
塑料光纤 3接口电路中集成电路 TOD^2402脚 1和脚 1 1、 1 2、 1 3、 14接 地，.脚 2通过电容 C9接主控芯片 KS8999__208的脚 5, 脚 3通过电容 C1()接主控 芯片 KS8999— 208的脚 6， 脚 4通过电阻 R34、 晶体管 V5、 V6、 电阻 R35、 R36、 R37、 R38、 R39与主控芯片 KS8999— 208的脚 192连接， 脚 5、 脚 7接 +3.3V直流 电压电源，脚 6接 VCCT3,脚 8 ίίϊΐ电容 C12接主控芯片 KS8999一 208的脚 1 0， 脚 9通过电容 C„接主控芯片 KS8999— 208的脚 9。
塑料光纤 4接口电路中集成电路 TODX2402脚 1和脚 11、 12、 13、 14接 地， 脚 2通过电容 C15接主控芯片 KS8999_208的脚 22， 脚 3通过电容 C6接主 控芯片 KS8999一 208的脚 23，脚 4通过电 |1 7、晶体管 V7、 V8、 电阻 8、 9、 R50、 R51、 2 主控芯片 KS8999„208的脚 1 93连接， 脚 5、 脚 7接 +3.3V直流 电压电源， 脚 6接 VCCT4, 脚 8 过电容 CI4接主控芯片 KS8999— 208的脚 20， 脚 9通过电容 C13接主控芯片 KS8999—208的脚 19。
塑料光纤 5接口电路中集成电路 ϊθϋΧ2402脚 1和脚 11、 1 2、 1 3、 14接 地， 脚 2通过电容 C17接主控芯片 KS8999— 208的脚 30， 脚 3通过电容 C18接主 控芯片 KS8999一 208的脚 3 1， 脚 4通过电 ¾ Rgo, 晶体管 V9、 V10. 电阻 1^、 2、 3、 R64、 5与主控芯片 KS8999一 208的脚 68连接， 脚 5、 脚 7接 +3.3V 直流电压电源， 脚 6接 VCCT5, 脚 8 ii 电容 C2o接主控芯片 KS8999— 208的 脚 34， 脚 9通过电容 C19接主控芯片 KS8999— 208的脚 33。
塑料光纤 6接口电路中集成电路 TODX2402脚 1和脚 1 1、 1 2、 1 3、 14接 地， 脚 2通过电容 C23接主控芯片 KS8999_208的脚 47， 脚 3通过电容 C24接主 控芯片 KS8999_208的脚 48， 脚 4通过电 R73、 晶体管 Vu、 V12、 电阻 R74、 R75、 R76、 R77、 R78与主控芯片 KS8999— 208的脚 69连接， 脚 5、 脚 7接 +3.3V 直流电压电源， 脚 6接 VCCT6, 脚 8 ii 电容 C22接主控芯片 KS8999一 208的 脚 44， 脚 9通过电容 C21接主控芯片 KS8999— 208的脚 43。
塑料光纤 7接口电路中集成电路 TODX2402脚 1和脚 11、 12、 13、 14接 地， 脚 2通过电容 C25接主控芯片 KS8999—208 的脚 54， 脚 3通过电容 C26接主 控芯片 KS8999一 208的脚 55， 脚 4通过电 6、 晶体管 V13、 V14、 电阻 7、 8、 9、 R9o、 R91与主控芯片 KS8999— 208的脚 70连接， 脚 5、 脚 7接 +3.3V 直流电压电源， 脚 ό接 VCCT7, 脚 8 ii 电容 C28接主控芯片 KS8999—208的 脚 58， 脚 9通过电容 C27接主控芯片 KS899一 2089的脚 57。
塑料光纤 8接口电路中集成电路 TODX2402脚 1.和脚 11、 12、 13、 14接 地， 脚 2通过电容 C31接主控芯片 KS8999— 208的脚 64， 脚 3通过电容 C32接主 控芯片 KS8999一 208的脚 65， 脚 4通过电 έ R99、 晶体管 V15、 V16> 电阻 00、 Rioi R 、 Rio3 RIM与主控芯片 KS8999— 208的脚 71连接，脚 5、脚 7接 +3.3V 直流电压电源， 脚 6接 VCCT8, 脚 8通 电容 C3o接主控芯片 KS8999—208的 脚 62， 脚 9通过电容 C29接主控芯片 KS8999—208的脚 6 1。
上述晶体管 ¼、 V2、 V3、 V4、 V5、 V6、 Ϋ7、 V8、 V9、 V10、 Vn V12、 V13、 Vi4、 Vi5、 Vi6均为 9013SMD ( SOT23 ) 晶体管。
25MHz晶振电路连接在主控芯片 KS8999_208的脚 176和脚 177上。
接插件 XP1、 XP2为扁平电缆插座 FC20P, Vr32为绿色发光二极管， V33 为红色发光二极管。
如图 16至 19所示， 光网卡电压转换电路包括： +5V直流电压转 +3.3V直 流电压的 DC-DC变换电路。 变换出的 +3.3V主要是供给网卡上各种芯片和光纤 接口电路之用。
光网卡的电压转换电路包括 +5V电压电源转 +3.3V电压电源电路和 +3.3V 电压电源转 +2.5V电压电源电路， 在 +5V电压输出端和 +3.3V电压输出端分别设 置滤波模拟电源电路和数字电源电路。
IP100A主控芯片为一个单片、全双工、 10M 1 100M自适应以太 MAC+PHY, 符合 EEEE802.3协议， 适应 1 00BASE-TX/100BASE-FX 10BASE-T, 并具有 32 位 PCI接口， 该芯片具有 128引脚 PQFP封装。
光纤模块接口的供电电路经滤波电路与 PCI接口的 +5V电源电压输出端连 接， 电压转换电路的 +5V电源输入端连接在 PCI接口的 A面脚 5、 8、 61、 62 和 B面脚 5、 6、 6 1、 62上。
EEPROM存储器的脚 6、 8与 PCI接口的 +3.3V电压电源连接， 其脚 1与 IP100A主控芯片的脚 28连接、 脚 2与 IPI00A主控芯片的脚 1 7连接、 脚 3与 IP100A主控芯片的脚 18连接、脚 4与 EP100A主控芯片的脚 22连接、脚 5接地。
BOOTROM存储器的脚 3、 7、 8与 PCI接口的 +3.3 V电压电源输出端连接， 其脚 1与 IP100A主控芯片的脚 27连接， 脚 2与 IP100A主控芯片的脚 22连接， 脚 4接地， 脚 5与 IH00A主控芯片的脚 1 8连接， 脚 6与 IP100A主控芯片的 脚 1 7连接。
指示数据接收和发送的指示灯电路包括一个 LED发光二极管和电阻先串后 并的电路组成，两个 LED发光二极管 LED^ LED2分别并联在 PCI接口的 +3.3V 电源电压输出端， 与发光二极管 LE 串联的电阻 连接在 IP100A主控芯片 的脚 21上， 与发光二极管 LED2串联的电阻 R2连接在 IP100A主控芯片的脚 1 6上。
25MHz晶振电路输入端 XTALj连接在 IPI00A主控芯片的脚 32上， 输出 端 XTAL2连接在 IP100A主控芯片的脚 31上。
如图 20、 21， 光中继器由两个光纤收发模块、 DC/DC变换器和 AC/DC变 换器以及电源指示发光二极管组成。
本发明设有将 220V交流电压转换成 +5V直流电压电路、光纤收发模块电源 处理电路、 光纤收发模块 IP!控制电路和光纤收发模块 ¾控制电路。
光纤收发模块电源处理电路连接在 +5V直流电压输出电路上， 光纤收发模 块 ΕΡί控制电路和光纤收发模块 Π>2控制电路分别连接在相应的光纤收发模块电 源处理电路的输出端， 光纤收发模块 IPi的输入端和输出端分别与光纤收发模块 IP2的输出端和输入端相连接。
光纤收发模块 lPi控制电路和光纤收发模块 EP2控制电路分别由模拟集成电路 Nl、 N2及外围电路组成。 模拟集成电路 Nl、 N2为 TODX2404或 TODX2402模 拟集成电路。
模拟集成电路 Nl、 N2的脚 1、 脚 9、脚 11、 12、 13、 14分别接地，脚 5分别 接 +5V直流电压,模似集成电路 N1脚 2与模似集成电路 N2脚 9连接，模似集成电 路 N1脚 3与模似集成电路 N2脚 8连接， 模拟集成电路 N1的脚 8与模拟集成电 路 N2的脚 3连接， 模拟集成电路 N1的脚 9与模拟集成电路 N2的脚 2连接。
模拟集成电路 N1的脚 2和脚 1之间连接电阻 ， 脚 3和脚 1之间连接电阻 R2， 模拟集成电路 N1的脚 6通过电感 1 与+5¥直流电压输出端连接， 电感！^的 两端分别还连接电容 和电容 C2， 电容 ^和 的另一端分别都与脚 1连接，在 电容 C2和电感 之间并联电阻 R2和 ， 电阻 和 的另一端分别与脚 2、 脚 3连接， 脚 7连接 +5V直流电压输出端， 脚 7和脚 8之间连接电阻 R5， 脚 7和脚 8之间还串联电阻 和电容 C3, 脚 7和脚 9之间连接电阻 R7， 脚 9还通过电阻 Rg接地， 在接地端与电感∑ .之间还并联电容 C3和电容 C4。
模拟集成电路 N2的脚 2和脚 1之间连接电阻 R9， 脚 3和脚 1之间连接电阻 Rn, 模拟集成电路 N2的脚 6通过电感 L2与 +5V直流电压输出端连接， 电感 L2 的两端分别还连接电容 C5和电容 C6， 电容 C5和 C6的另一端分别都与脚 1连接， 在电容 C6和电感 L2之间并联电阻 R1()和 R12，电阻 R1()和 R12的另一端分别与脚 2、 脚 3连接，脚 7连接 +5V直流电压输出端，脚 7和脚 8之间连接电阻 R13， 脚 7和 脚 8之间还串联电阻 R14和电容 C7，脚 7和脚 9之间连接电阻 R15，脚 9还通过电 阻 R16接地， 在接地端与电感 L2之间还并联电容 C7和电容 C8。
电源转换电路的 +5V直流电压输出端连接电源指示灯电路， 电源指示灯电路 由发光二极管 LED和电阻 R17串联组成，发光二极管 LED的正极端连接在电源转 换电路的 +5V直流电压输出端， 电阻 R17的一端接地。
如果有两台 650nm以太网交换机 A和 B要进行互联， 而两者的距离有 80m， 此时就不能直接互联， 必须加入 650nm光中继器， 用一对长 40m长的 650nm 聚合物光纤将交换机 A的外线收发端和 650nm光中继器的收发端光口 1 (或光 口 2)相连， 用一对长 40m长的 650nm聚合物光纤将交换机 B的外线收发端和 650ml光中继器的另一个收发端光口 2 (或光口 1 )相连， 这样就完成了两台 650nm以太网交换机的互联。
如图 22至 26所示，光电转换器的 RJ45接口由介质转换控制芯片 DM9331 A N3和与 N3连接的 TP接口电路、 晶振电路、 自动、 全双工选择指示电路、 变 压电路组成。
光电转换器的供电电路包括两部分：
—是 220V交流电压转 +5V直流电压的 AC/DC变换电路， 允许的交流输入为 150V〜264V、 50/60Hz、 输出电压精度为 ±1 %， 紋波系数小于 1 %。
二是 +5v直流电压转 +3.3V直流电压的 DC/DC变换电路。 变换出的 +3.3V主 要是供给芯片 DM9331和光纤接口电路之用。 电源的地间分别设置 2.2uH电感和 滤波电容。
指示灯电路由电阻和 LED串接组成。
光信号接口电路由介质转换控制芯片 DM9331 N2和与 N2连接的光接口电 路、 光模块供电电路、 光模块方向转换器、 半全双工转换及指示电路组成， 光接 口电路由接插件 TODX2402和电阻组成。
光信号接口电路上还设有指示灯电路。
光信号接口电路的媒体转换控制芯片 N2的脚 43连接在 50MHz的晶振电源 输出端。
芯片 N2的脚 1 7与芯片 N3的脚 14连接， 芯片 N2的脚 19与芯片 N3的脚 28连接， 芯片 N2的脚 20与芯片 N3的脚 29连接， 芯片 N2的脚 21与芯片 N3 的脚 37连接， 芯片 N2的脚 24与芯片 N3的脚 24连接， 芯片 N2的脚 25与芯 片 N3的脚 25连接，芯片 N2的脚 26与芯片 N3的脚 1 7连接，芯片 N2的脚 28 与芯片 N3的脚 19连接， 芯片 N2的脚 29与芯片 N3的脚 20连接， 芯片 N2的 脚 3 7与芯片 N3的脚 21连接， 芯片 N2的脚 40与芯片 N3的脚 40连接。
一个介质转换控制芯片 DM9301A的 TXEN端与另一介质转换控制芯片 DM9301A的 RXDV端交叉互接、一个媒体转换控制芯片 DM9301A的 RXD端 与另一个媒体转换控制芯片 DM9301A的 TXD端交叉互接， 两个媒体转换控制 芯片 DM9301A的 FXRD端、 FXTD端分别外接。 两个媒体转换控制芯片 DM9301A的 OSCIN端都连接在 50MHz的晶振电源输出端。
光纤收发接口电路： 以 TOSHIBA公司的光纤收发模块 TODX2402为主组 成， 构成交换机物理层上的 8个数据输入 /输出通道， 将双向数据连接到介质转 换芯片 DM9331的 RX+/FXRD+, RX-/FXRD, TX+/FXTD+, , TX-/FXTD-, 等 4 个 I/O脚， 在 FXSD1信号的控制下独立实现光信号的收发交换。
当光交换芯片的光信号检测引脚 FXSD18的电压值大于 0.6V时，该端口工 作在 100BaseFX模式， 且当 0.6V<VFXSDn<1.25V时， FXSDn为低电平， 光信 号连接指示 "熄灭"； 当 VFXSDn>1.25V时， FXSDn为髙电平， 光信号连接指 示 "点亮"。
光电转换器通过两个工作状态指示灯，显示光电转换器的动态工作状态，例 如数据传输、 出错情况等。
DIAG—STO~诊断状态输出， 当 D1AG_ACT=1且处于 FX方式时，
DIAG—STO-1代表光线连接成功； =0代表 纤连接失败。 用于自动回环测试。
LENK/Acl—连接或活动指示灼。。
FX一 FAULTLED~FX模式下， 指示光纤信号错误。
光 收发模块 TODX2402和介质转换芯片 DM9331 A的信号接口均为 3.3 伏 PECL接口。

Claims

权 利 要 求 书
1、一种 650nm塑料光纤传输系统，其特征在于主要由将 1550un或 1310nm 或 850nm石英光纤信号转换成 650nm塑料光纤信号的波长转换器、 光交换机、 光网卡组成， 波长转换器、 光交换机、 光网卡之间依次通过信息传输速率为 100Mbps的塑料光纤连接。
2、根据权利要求 1所述 650nm塑料光纤传输系统， 其特征在于在连续的塑 料光纤上串接至少一个光中继器，
3、根据权利要求 1所述 650nm塑料光纤传输系统， 其特征在于在光交换机 上还通过塑料光纤连接光电转换器， 光电转换器的另一端连接五类线。
4、根据权利要求 1或 2或 3所述 650nm塑料光纤传输系统， 其特征在于波 长转换器包括由供给整个系统的电源电路、 V25806石英光纤接口控制电路、 TODX2402塑料光纤接口控制电路、 两个介质转换控制芯片 DM9331A、 晶振电 路； 晶振电路连接在电源电路上， 晶振电路又分别与两个介质转换控制芯片 DM9331 A连接， 两个介质转换控制芯片 DM9331A相互连接， 每个介质转换控 制芯片 DM9331A分别与 V25806石英光纤接口控制电路、 TODX2402塑料光纤 接口电路控制连接。
5、根据权利要求 4所述 650nm塑料光纤传输系统， 其特征在于光交换机包 括两块以交换芯片 KS8999为核心的主控板， 商块主控板通过介质独立接口 ΜΠ 并联构成一个 16路的交换系统；每块芯片 KS8999上集成有八个物理层收发器， 每块芯片 KS8999分别具有以下控制和服务功能块： 流量控制、 VLAN、 优先权 处理、 1K空间的 MAC査找引擎、排队优先权管理、缓存区管理、 .8个接入控制 器、 8个物理层收发器、 E2PROM/处理器接口、 LED工 [作状态显示、 MII/SNI 专用外部接口、 MAC接口。
6、 根据权利要求 5所述 650nm塑料光纤传输系统， 其特征在于光网卡主 要由 I P100A主控芯片、与 EP100A主控芯片连接的总线宽度为 32位的 PCI接口 电路、 电压转换电路、供电电压为 +3.3的光纤模块接口电路、 EEPROM存储器、 指示数据接收和发送的指示灯电路、 为主控芯片提供时钟源的 25MHz品振电路 组成。
7、根据权利要求 2所述 650nm塑料光纤传输系统， 其特征在于光中继器主 要由两个光纤收发模块、 为光纤收发模块提供工作电压的 DC I DC变换器和 AC/DC变换器组成 0
8、根据权利要求 7所述 650nnl塑料光纤传输系统，其特征在于光中继器主 要由电源转换电路、 光纤收发模块电源处理电路、 光纤收发模块 控制电路和 光纤收发模块 IP2控制电路组成， 电源转换电路包括 220V交流 压转换成 +5V 直流电压电路，光纤收发模块电源处理电路连接在 +5V直流电压输出电路上，光 纤收发模块 ΙΡι控制电路和光纤收发模块 ¾控制电路分别连接在相应的光纤收 发模块电源处理电路的输出端， 光纤收发模块 的输入端和输出端分别与光纤 收发模块 Π»2的输出端和输入端相连接。
9、根据权利要求 3所述 650nm塑料光纤传输系统， 其特征在于光电转换器 包括由供给整个系统的电源电路、光接口电路、 电接口电路、两个介质转换控制 芯片 DM9331A、 晶振电路； 晶振电路连接在电源电路上， 晶振电路又分别与两 个介质转换控制芯片 DM9331A连接，两个介质转换控制芯片 DM933 1A相互连 接， 每个介质转换控制芯片 DM9331A分别与光接口电路、 电接口电路连接。
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