KR940001815B1 - 채널별 변조특성을 보상하는 fm 변조기 - Google Patents
채널별 변조특성을 보상하는 fm 변조기 Download PDFInfo
- Publication number
- KR940001815B1 KR940001815B1 KR1019910008356A KR910008356A KR940001815B1 KR 940001815 B1 KR940001815 B1 KR 940001815B1 KR 1019910008356 A KR1019910008356 A KR 1019910008356A KR 910008356 A KR910008356 A KR 910008356A KR 940001815 B1 KR940001815 B1 KR 940001815B1
- Authority
- KR
- South Korea
- Prior art keywords
- frequency
- channel
- modulator
- capacitance
- operational amplifier
- 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.)
- Expired - Fee Related
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Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03C—MODULATION
- H03C3/00—Angle modulation
- H03C3/02—Details
- H03C3/08—Modifications of modulator to linearise modulation, e.g. by feedback, and clearly applicable to more than one type of modulator
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
- H03D7/00—Transference of modulation from one carrier to another, e.g. frequency-changing
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transmitters (AREA)
- Transceivers (AREA)
- Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)
- Channel Selection Circuits, Automatic Tuning Circuits (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
Description
Claims (4)
- 셀룰라 무선 전화기에서 다수의 각 채널별 변조 특성을 보상하는 FM 변조기에 있어서, 송수신 채널을 감지하여 채널을 지정하기 위한 데이터를 출력하고, 다수의 각 채널에 따라 스위치 제어 신호를 발생하는 제어부(10)와, 입력채널 주파수를 입력하여 상기 제어부(10)의 스위치 제어 신호에 의해 이득을 조절하여 채널에 따른 음성주파수 특성을 보상하기 위한 주파수 특성 보상부(20)와, 상기 주파수 특성 보상부(20)에서 보상된 음성주파수의 시간에 따른 각 전압을 캐패시턴스로 변환하는 캐패시턴스 변환부(30)와, 상기 캐패시턴스 변환부(30)에서 변환된 캐패시턴스 값에 의해 공진하여 공진주파수를 설정하기 위한 공진기(40)와, 상기 공진기(40)의 출력은 공진주파수에 의해 주파수를 변조하기 위한 발진 주파수를 발생하는 전압제어 발진기(50)로 구성함을 특징으로 하는 FM 변조기.
- 제1항에 있어서, 상기 주파수 특성 보상부(20)는 캐패시터(C11)와 저항(R0)이 직렬 연결되어 연산증폭기(OP1)의 비반전단자(-)에 접속되고, 상기 연산증폭기(OP1)의 비반전단자(+)에 채널에 따른 기준전압(Vf)이 공급되며, 상기 연산증폭기(OP1)의 비반전단자(-)와 출력단 사이에 저항(R1)이 접속되고, 다수의 저항(R2-Rn)이 다수의 스위치(SW2-SWn)와 각각 직렬 연결되어 상기 저항(R1)의 양단에 병렬로 접속 구성함을 특징으로 하는 FM 변조기.
- 제2항에 있어서, 상기 다수의 저항(R1-Rn)은 각 채널에 따른 스위치 제어 신호에 따라 저항값을 가변함을 특징으로 하는 FM 변조기.
- 제2항에 있어서, 다수의 스위치(SW2-SWn)는 각 채널에 해당하는 음성주파수의 이득을 결정하기 위해 온/오프 스위칭 함을 특징으로 하는 FM 변조기.
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019910008356A KR940001815B1 (ko) | 1991-05-23 | 1991-05-23 | 채널별 변조특성을 보상하는 fm 변조기 |
| US07/788,290 US5151668A (en) | 1991-05-23 | 1991-11-05 | FM modulator for compensating modulation characteristics on each channel |
| DK182191A DK182191A (da) | 1991-05-23 | 1991-11-05 | Fm-modulator |
| SE9103315A SE516646C2 (sv) | 1991-05-23 | 1991-11-12 | FM-Modulator för kompensering av moduleringsegenskaper på varje kanal |
| NO914761A NO180400C (no) | 1991-05-23 | 1991-12-04 | FM modulator som kompenserer modulasjonskarakteristikker |
| FI916121A FI109381B (fi) | 1991-05-23 | 1991-12-23 | FM-modulaattori kunkin kanavan modulaatio-ominaisuuksien kompensoimiseksi |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019910008356A KR940001815B1 (ko) | 1991-05-23 | 1991-05-23 | 채널별 변조특성을 보상하는 fm 변조기 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR920022643A KR920022643A (ko) | 1992-12-19 |
| KR940001815B1 true KR940001815B1 (ko) | 1994-03-09 |
Family
ID=19314796
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1019910008356A Expired - Fee Related KR940001815B1 (ko) | 1991-05-23 | 1991-05-23 | 채널별 변조특성을 보상하는 fm 변조기 |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US5151668A (ko) |
| KR (1) | KR940001815B1 (ko) |
| DK (1) | DK182191A (ko) |
| FI (1) | FI109381B (ko) |
| NO (1) | NO180400C (ko) |
| SE (1) | SE516646C2 (ko) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5410735A (en) * | 1992-01-17 | 1995-04-25 | Borchardt; Robert L. | Wireless signal transmission systems, methods and apparatus |
| US5834889A (en) * | 1995-09-22 | 1998-11-10 | Gl Displays, Inc. | Cold cathode fluorescent display |
| DE19535695C2 (de) * | 1995-09-26 | 1997-10-16 | Bosch Gmbh Robert | Spannungsgesteuerter Oszillator |
| US6064699A (en) * | 1997-07-07 | 2000-05-16 | Golden Eagle Electronics Manufactory Ltd. | Wireless speaker system for transmitting analog and digital information over a single high-frequency channel |
| KR100501182B1 (ko) * | 1998-07-07 | 2005-09-26 | 삼성전기주식회사 | 광대역용 2입력 변조회로 |
| AU2002336341A1 (en) * | 2002-02-20 | 2003-09-09 | Planar Systems, Inc. | Light sensitive display |
| US20060034492A1 (en) * | 2002-10-30 | 2006-02-16 | Roy Siegel | Hand recognition system |
| US20080084374A1 (en) | 2003-02-20 | 2008-04-10 | Planar Systems, Inc. | Light sensitive display |
| US6963240B2 (en) * | 2003-11-25 | 2005-11-08 | International Business Machines Corporation | Damping of LC ringing in IC (integrated circuit) power distribution systems |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4117422A (en) * | 1977-12-27 | 1978-09-26 | Motorola, Inc. | Circuit for compensating vco nonlinearities in frequency modulated phase-locked loops and method thereof |
| US5075644A (en) * | 1990-12-03 | 1991-12-24 | Motorola, Inc. | Voltage controlled oscillator with filtered and compensated modulation |
-
1991
- 1991-05-23 KR KR1019910008356A patent/KR940001815B1/ko not_active Expired - Fee Related
- 1991-11-05 US US07/788,290 patent/US5151668A/en not_active Expired - Lifetime
- 1991-11-05 DK DK182191A patent/DK182191A/da not_active Application Discontinuation
- 1991-11-12 SE SE9103315A patent/SE516646C2/sv not_active IP Right Cessation
- 1991-12-04 NO NO914761A patent/NO180400C/no unknown
- 1991-12-23 FI FI916121A patent/FI109381B/fi active
Also Published As
| Publication number | Publication date |
|---|---|
| FI109381B (fi) | 2002-07-15 |
| SE9103315L (sv) | 1992-11-24 |
| DK182191A (da) | 1992-11-24 |
| SE516646C2 (sv) | 2002-02-05 |
| KR920022643A (ko) | 1992-12-19 |
| FI916121A0 (fi) | 1991-12-23 |
| FI916121A7 (fi) | 1992-11-24 |
| NO180400C (no) | 1997-04-09 |
| NO914761D0 (no) | 1991-12-04 |
| DK182191D0 (da) | 1991-11-05 |
| SE9103315D0 (sv) | 1991-11-12 |
| US5151668A (en) | 1992-09-29 |
| NO914761L (no) | 1992-11-24 |
| NO180400B (no) | 1996-12-30 |
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