GB470372A - Improvements in or relating to radio and like receivers - Google Patents
Improvements in or relating to radio and like receiversInfo
- Publication number
- GB470372A GB470372A GB1984/37A GB198437A GB470372A GB 470372 A GB470372 A GB 470372A GB 1984/37 A GB1984/37 A GB 1984/37A GB 198437 A GB198437 A GB 198437A GB 470372 A GB470372 A GB 470372A
- Authority
- GB
- United Kingdom
- Prior art keywords
- frequency
- selectivity
- jan
- radio
- vary
- 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
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G5/00—Tone control or bandwidth control in amplifiers
- H03G5/16—Automatic control
- H03G5/24—Automatic control in frequency-selective amplifiers
- H03G5/26—Automatic control in frequency-selective amplifiers having discharge tubes
Landscapes
- Circuits Of Receivers In General (AREA)
Abstract
470,372. Wireless receiving circuits. TELEFUNKEN GES. FUR DRAHTLOSE TELEGRAPHIE. Jan. 22, 1937, No. 1984. Convention date, Jan. 22, 1936. [Class 40 (v)] The selectivity of a radio receiver is automatically regulated in dependence upon the strength of high audio frequencies derived from the audio frequency portion of the receiver. In the embodiment shown, G is the signal rectifier and N a low-frequency amplifier, part of the output from which is applied to a second rectifier GL through a high pass note filter K which selects the higher audio frequencies. The resultant voltage is applied to vary the grid bias of a valve R acting as a variable damping impedance in series with a coil in the radio frequency filter network B ; the selectivity is thereby increased as the high note frequency amplitude increases. Alternatively the control voltage may be applied to vary the coupling of network B or both damping and coupling.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE470372X | 1936-01-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB470372A true GB470372A (en) | 1937-08-13 |
Family
ID=6541118
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1984/37A Expired GB470372A (en) | 1936-01-22 | 1937-01-22 | Improvements in or relating to radio and like receivers |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB470372A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2624838A (en) * | 1945-12-07 | 1953-01-06 | Int Standard Electric Corp | Radio receiver employing band pass coupling circuit arrangements |
| DE940362C (en) * | 1941-05-01 | 1956-03-15 | Telefunken Gmbh | Arrangement for eliminating the inherent noise of a receiver containing an amplitude limiter for frequency-modulated oscillations in the absence of reception |
-
1937
- 1937-01-22 GB GB1984/37A patent/GB470372A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE940362C (en) * | 1941-05-01 | 1956-03-15 | Telefunken Gmbh | Arrangement for eliminating the inherent noise of a receiver containing an amplitude limiter for frequency-modulated oscillations in the absence of reception |
| US2624838A (en) * | 1945-12-07 | 1953-01-06 | Int Standard Electric Corp | Radio receiver employing band pass coupling circuit arrangements |
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