GB1163083A - Four Terminal Networks. - Google Patents
Four Terminal Networks.Info
- Publication number
- GB1163083A GB1163083A GB413866A GB413866A GB1163083A GB 1163083 A GB1163083 A GB 1163083A GB 413866 A GB413866 A GB 413866A GB 413866 A GB413866 A GB 413866A GB 1163083 A GB1163083 A GB 1163083A
- Authority
- GB
- United Kingdom
- Prior art keywords
- impedance
- network
- negative
- connections
- negative impedance
- 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
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/02—Details
- H04B3/40—Artificial lines; Networks simulating a line of certain length
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H11/00—Networks using active elements
- H03H11/02—Multiple-port networks
- H03H11/28—Impedance matching networks
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/02—Details
- H04B3/04—Control of transmission; Equalising
- H04B3/16—Control of transmission; Equalising characterised by the negative-impedance network used
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Amplifiers (AREA)
- Measurement Of Resistance Or Impedance (AREA)
- Interface Circuits In Exchanges (AREA)
Abstract
1,163,083. Negative impedance network. STANDARD TELEPHONES & CABLES Ltd. 27 Jan., 1967 [31 Jan., 1966], No. 4138/66. Heading H4R. A four-terminal network having a connection from each of one pair of terminals to a corresponding one of the other pair comprises a resistance and a negative impedance in series in one of the connections, a positive impedance connected between the two connections and a negative impedance connected between the two connections, each negative impedance being achieved by a negative impedance converter, and the relative values of the resistance positive, and negative impedances being sochosen that the image impedance of one pair of terminals is R whilst that of the other is Z 0 . The network may be used to interconnect functions of different impedances, e.g. loaded to non-loaded lines or for supplying gain. In an arrangement for matching a left-hand impedance R to an impedance Z 0 (Fig. 1) the series arms are R and - Z 0 and the shunt arms - 2R and 2Z 0 in parallel. The network is analysed with reference to Figs. 2-5 (not shown) and a # network for effecting the same matching is illustrated in Fig. 6. The converter the series circuit should be open circuit stable and the one in the shunt arm short-circuit stable. A known transistor converter suitable for voice frequencies is described with reference to Fig. 7 (not shown), and the connection of such converters is described with reference to Fig. 8 (not shown). An adjustable auto transformer may be included between the two shunt elements for the adjustment of gain.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB413866A GB1163083A (en) | 1966-01-31 | 1966-01-31 | Four Terminal Networks. |
| DE1967J0032875 DE1277357B (en) | 1966-01-31 | 1967-01-28 | Two-way amplifier based on the negative line principle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB413866A GB1163083A (en) | 1966-01-31 | 1966-01-31 | Four Terminal Networks. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1163083A true GB1163083A (en) | 1969-09-04 |
Family
ID=9771484
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB413866A Expired GB1163083A (en) | 1966-01-31 | 1966-01-31 | Four Terminal Networks. |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE1277357B (en) |
| GB (1) | GB1163083A (en) |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1069692B (en) * | 1959-11-26 | |||
| DE587649C (en) * | 1930-11-19 | 1933-11-07 | Porzellanfabrik Ph Rosenthal & | Electrical resistance |
| US2844669A (en) * | 1955-05-10 | 1958-07-22 | Itt | Negative-impedance repeater having gain controls |
| CH366309A (en) * | 1955-08-10 | 1962-12-31 | S T I P E L Societa Telefonica | Negative impedance amplification device |
| US2904641A (en) * | 1955-11-29 | 1959-09-15 | Itt | Negative-impedance repeater using a transistor amplifier |
| DE1008782B (en) * | 1956-08-18 | 1957-05-23 | Standard Elektrik Ag | Two-wire amplifier station made up of two individual amplifiers connected to one another via hybrid circuits |
| DE1062752B (en) * | 1957-03-19 | 1959-08-06 | Standard Elektrik Lorenz Ag | Method for anechoic de-damping of passive four-pole connections, preferably two-wire lines |
| DE1148274B (en) * | 1959-07-24 | 1963-05-09 | Int Standard Electric Corp | Complex negative resistance as a line amplifier for telephone purposes |
-
1966
- 1966-01-31 GB GB413866A patent/GB1163083A/en not_active Expired
-
1967
- 1967-01-28 DE DE1967J0032875 patent/DE1277357B/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| DE1277357B (en) | 1968-09-12 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| 435 | Patent endorsed 'licences of right' on the date specified (sect. 35/1949) | ||
| PLNP | Patent lapsed through nonpayment of renewal fees |