GB438504A - Improvements in or relating to superheterodyne receivers - Google Patents
Improvements in or relating to superheterodyne receiversInfo
- Publication number
- GB438504A GB438504A GB507034A GB507034A GB438504A GB 438504 A GB438504 A GB 438504A GB 507034 A GB507034 A GB 507034A GB 507034 A GB507034 A GB 507034A GB 438504 A GB438504 A GB 438504A
- Authority
- GB
- United Kingdom
- Prior art keywords
- frequency
- controls
- potentiometer
- potential
- circuits
- 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
- 230000010355 oscillation Effects 0.000 abstract 2
- 230000003321 amplification Effects 0.000 abstract 1
- 238000007689 inspection Methods 0.000 abstract 1
- 238000003199 nucleic acid amplification method Methods 0.000 abstract 1
- 238000010079 rubber tapping Methods 0.000 abstract 1
- 239000011800 void material Substances 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G3/00—Gain control in amplifiers or frequency changers
- H03G3/20—Automatic control
- H03G3/22—Automatic control in amplifiers having discharge tubes
- H03G3/225—Automatic control in amplifiers having discharge tubes controlling or controlled by the (local) oscillators of a (super)heterodyne receiver
Landscapes
- Radar Systems Or Details Thereof (AREA)
Abstract
438,504. Valve circuits for wireless reception. MARCONI'S WIRELESS TELEGRAPH CO., Ltd., Electra House, Victoria Embankment, London.-(Assignees of Roberts, W. Van B.; 155, Hodge Road, Princeton, New Jersey, U.S.A.) Feb. 15, 1934, No. 5070. Void [Abridged as open to inspection under Sect. 91 of the Acts, Aug. 16, 1934]. [Class 40 (v)] A superheterodyne receiver includes means for simultaneously varying the high-frequency gain and the strength of the local oscillations applied to the frequency changing stage. The cathode circuits of the radio-frequency and intermediate-frequency amplifiers 1, 5 respectively, include biassing resistances rl, r2 respectively, which are taken to tappings 4, 7 respectively on the fixed portion R2 of a potentiometer connected across the main H.T. supply. The portion R of this potentio-. meter is variable and thus controls the grid bias and amplification of the valves 1, 5. In addition, variation of resistance R also controls the potential at the point 19 on a fixed potentiometer R1 which supplies the anode potential for the local oscillator 8, and hence varies the amplitude of the oscillations produced thereby.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB507034A GB438504A (en) | 1934-02-15 | 1934-02-15 | Improvements in or relating to superheterodyne receivers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB507034A GB438504A (en) | 1934-02-15 | 1934-02-15 | Improvements in or relating to superheterodyne receivers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB438504A true GB438504A (en) | 1935-11-11 |
Family
ID=9789187
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB507034A Expired GB438504A (en) | 1934-02-15 | 1934-02-15 | Improvements in or relating to superheterodyne receivers |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB438504A (en) |
-
1934
- 1934-02-15 GB GB507034A patent/GB438504A/en not_active Expired
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