GB542485A - Improvements in coupling-circuit arrangements in radio-receivers - Google Patents
Improvements in coupling-circuit arrangements in radio-receiversInfo
- Publication number
- GB542485A GB542485A GB1162341A GB1162341A GB542485A GB 542485 A GB542485 A GB 542485A GB 1162341 A GB1162341 A GB 1162341A GB 1162341 A GB1162341 A GB 1162341A GB 542485 A GB542485 A GB 542485A
- Authority
- GB
- United Kingdom
- Prior art keywords
- circuit
- intermediate frequency
- coupling
- inductance
- tuned
- 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
- H04B1/06—Receivers
- H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Abstract
542,485. Valve circuits for wireless reception. MARCONI'S WIRELESS TELEGRAPH CO., Ltd., COCKERELL, C. S., BRAILSFORD, J. D., and CUFFLIN, M. H. Feb. 23, 1940, No. 11623/41. Divided out of 552,497. [Class 40 (v)] In a supersonic heterodyne receiver the coupling between first and second signal frequency valves comprises a circuit tunable by a variable capacity and having in series with the inductance a trap circuit tuned to the intermediate frequency. In a multi-band receiver the trap circuit LT, CT may be provided only on that waveband which is close to the intermediate frequency. The inductance L3 may be connected to a tapping in the trap circuit and the waveband switch may short circuit the unused contacts 2 ... 5. In this way instability due to the tuned circuit having a high impedance at the intermediate frequency is avoided and whistles due to pick-up at the intermediate frequency are prevented. Specification 422,312 is referred to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1162341A GB542485A (en) | 1940-02-23 | 1940-02-23 | Improvements in coupling-circuit arrangements in radio-receivers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1162341A GB542485A (en) | 1940-02-23 | 1940-02-23 | Improvements in coupling-circuit arrangements in radio-receivers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB542485A true GB542485A (en) | 1942-01-12 |
Family
ID=9989669
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1162341A Expired GB542485A (en) | 1940-02-23 | 1940-02-23 | Improvements in coupling-circuit arrangements in radio-receivers |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB542485A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE943833C (en) * | 1951-07-01 | 1956-06-01 | Siemens Ag | Circuit arrangement for switchable overlay receivers with high-frequency pre-stage |
-
1940
- 1940-02-23 GB GB1162341A patent/GB542485A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE943833C (en) * | 1951-07-01 | 1956-06-01 | Siemens Ag | Circuit arrangement for switchable overlay receivers with high-frequency pre-stage |
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