GB747757A - Improvements in or relating to negative impedance devices - Google Patents
Improvements in or relating to negative impedance devicesInfo
- Publication number
- GB747757A GB747757A GB11177/54A GB1117754A GB747757A GB 747757 A GB747757 A GB 747757A GB 11177/54 A GB11177/54 A GB 11177/54A GB 1117754 A GB1117754 A GB 1117754A GB 747757 A GB747757 A GB 747757A
- Authority
- GB
- United Kingdom
- Prior art keywords
- negative impedance
- shunts
- winding
- relating
- capacitor
- 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
- H04B3/04—Control of transmission; Equalising
- H04B3/16—Control of transmission; Equalising characterised by the negative-impedance network used
- H04B3/18—Control of transmission; Equalising characterised by the negative-impedance network used wherein the network comprises semiconductor devices
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Networks Using Active Elements (AREA)
- Amplifiers (AREA)
Abstract
747,757. Telephone transmission systems. MOULON, J. M. April 15, 1954 [June 18, 1953], No. 11177/54. Class 40 (4). [Also in Group XL (c)] In a negative impedance device in which the output 4, 5, Fig. 6, of an amplifier feeds a network in turn connected to the input 2, 3 the network comprises a phase-reversing transformer 10, 11 with the negative impedance occurring between the terminals 7, 8. The device may be coupled to a telephone circuit 15 over transformer 19, capacitor 20 allowing a PNP transistor 12 to be energized from the line. An impedance A shunts the winding 11 or in a modification, Fig. 2 (not shown), shunts winding 10 or may be connected across the windings, Fig. 5 (not shown). Feedback from the collector emitter circuit of the transistor 12 is taken over capacitor 13 to the base emitter circuit, resistor 14 biasing the base. Specification 738,319 is referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1085098T | 1953-06-18 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB747757A true GB747757A (en) | 1956-04-11 |
Family
ID=9612010
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB11177/54A Expired GB747757A (en) | 1953-06-18 | 1954-04-15 | Improvements in or relating to negative impedance devices |
Country Status (4)
| Country | Link |
|---|---|
| BE (1) | BE526152A (en) |
| CH (1) | CH324353A (en) |
| FR (1) | FR1085098A (en) |
| GB (1) | GB747757A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2904641A (en) * | 1955-11-29 | 1959-09-15 | Itt | Negative-impedance repeater using a transistor amplifier |
-
0
- BE BE526152D patent/BE526152A/xx unknown
-
1953
- 1953-06-18 FR FR1085098D patent/FR1085098A/en not_active Expired
- 1953-12-16 CH CH324353D patent/CH324353A/en unknown
-
1954
- 1954-04-15 GB GB11177/54A patent/GB747757A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| BE526152A (en) | |
| FR1085098A (en) | 1955-01-27 |
| CH324353A (en) | 1957-09-15 |
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