GB694991A - Improvements in or relating to send-receive control circuits for radio telephone stations - Google Patents
Improvements in or relating to send-receive control circuits for radio telephone stationsInfo
- Publication number
- GB694991A GB694991A GB1107451A GB1107451A GB694991A GB 694991 A GB694991 A GB 694991A GB 1107451 A GB1107451 A GB 1107451A GB 1107451 A GB1107451 A GB 1107451A GB 694991 A GB694991 A GB 694991A
- Authority
- GB
- United Kingdom
- Prior art keywords
- voltage
- rectifier
- resistance
- relating
- send
- 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
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
- H04B1/44—Transmit/receive switching
- H04B1/46—Transmit/receive switching by voice-frequency signals; by pilot signals
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
694,991. Radio transmitting and receiving systems. MARCONI'S WIRELESS TELEGRAPH CO., Ltd. Jan. 24, 1952 [May 10, 1951], No. 11074/51. Class 40 (v). The voltage developed across the grid leak 4 of the last valve of a transmitter is fed through low-pass filter 6, 7, 11, 12, 13 and rectifier 8 to the A.G.C. line of the associated receiver to disable the latter when said voltage exceeds the receiver A.G.C. voltage. The A.G.C. voltage which is derived from circuit 5, 15 ... 19, is fed to the A.G.C. line through low-pass filter 10, 14 and rectifier 9. Rectifiers 8, 9 are poled so that one is cut off when the other is conducting. If the backward resistance of the rectifiers is very high, a further leak resistance 20 is connected between their junction and earth. If the required disabling voltage is low, rectifier 8 may be replaced by a resistance of two to three times the backward resistance of rectifier 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1107451A GB694991A (en) | 1951-05-10 | 1951-05-10 | Improvements in or relating to send-receive control circuits for radio telephone stations |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1107451A GB694991A (en) | 1951-05-10 | 1951-05-10 | Improvements in or relating to send-receive control circuits for radio telephone stations |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB694991A true GB694991A (en) | 1953-07-29 |
Family
ID=9979540
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1107451A Expired GB694991A (en) | 1951-05-10 | 1951-05-10 | Improvements in or relating to send-receive control circuits for radio telephone stations |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB694991A (en) |
-
1951
- 1951-05-10 GB GB1107451A patent/GB694991A/en not_active Expired
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