GB469896A - Improvements in or relating to automatic gain control circuit arrangements - Google Patents
Improvements in or relating to automatic gain control circuit arrangementsInfo
- Publication number
- GB469896A GB469896A GB326836A GB326836A GB469896A GB 469896 A GB469896 A GB 469896A GB 326836 A GB326836 A GB 326836A GB 326836 A GB326836 A GB 326836A GB 469896 A GB469896 A GB 469896A
- Authority
- GB
- United Kingdom
- Prior art keywords
- valve
- impedance
- tuned circuit
- feed
- gain control
- 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
- H03G1/00—Details of arrangements for controlling amplification
- H03G1/04—Modifications of control circuit to reduce distortion caused by control
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/34—Negative-feedback-circuit arrangements with or without positive feedback
- H03F1/36—Negative-feedback-circuit arrangements with or without positive feedback in discharge-tube amplifiers
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
469,896. Valve amplifying circuits. MARCONI'S WIRELESS TELEGRAPH CO., Ltd., and BRAILSFORD, J. D. Feb. 3, 1936, No. 3268. [Class 40 (v)] Gain control is effected by feed back in an impedance associated with an auxiliary valve which is controlled by normal A.V.C. potentials or manually. In the Figure, the output voltage from the main valve 1 is taken to the grid of an auxiliary valve 10 which is connected through the resistance 14 to a source of A.V.C. potential. An impedance 5 is common to the cathode circuits of both valves. Negative feed-back voltage is produced across the impedance 5 due to the valve 1 and positive feed-back due to valve 10. When a stronger signal is received, valve 10 is biassed more negatively and the positive feed-back, and therefore the resultant ratio of output to input, is reduced. In a preferred arrangement, Fig. 2 (not shown), the main valve is coupled to the auxiliary valve by a tuned circuit; the common impedance in the cathode circuits also being a tuned circuit. With this arrangement the grid connection to the auxiliary valve may be " tupped down " on the tuned circuit, in the same way as the input to the tuned circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB326836A GB469896A (en) | 1936-02-03 | 1936-02-03 | Improvements in or relating to automatic gain control circuit arrangements |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB326836A GB469896A (en) | 1936-02-03 | 1936-02-03 | Improvements in or relating to automatic gain control circuit arrangements |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB469896A true GB469896A (en) | 1937-08-03 |
Family
ID=9755119
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB326836A Expired GB469896A (en) | 1936-02-03 | 1936-02-03 | Improvements in or relating to automatic gain control circuit arrangements |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB469896A (en) |
-
1936
- 1936-02-03 GB GB326836A patent/GB469896A/en not_active Expired
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