GB469895A - Improvements in or relating to gain control arrangements for valve amplifiers and the like - Google Patents
Improvements in or relating to gain control arrangements for valve amplifiers and the likeInfo
- Publication number
- GB469895A GB469895A GB326736A GB326736A GB469895A GB 469895 A GB469895 A GB 469895A GB 326736 A GB326736 A GB 326736A GB 326736 A GB326736 A GB 326736A GB 469895 A GB469895 A GB 469895A
- Authority
- GB
- United Kingdom
- Prior art keywords
- valve
- impedance
- channels
- outputs
- controlled
- 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
- 238000010894 electron beam technology Methods 0.000 abstract 1
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
Landscapes
- Amplifiers (AREA)
- Microwave Amplifiers (AREA)
Abstract
469,895. 'Vale amplifying circuits. MARCONI'S WIRELESS TELEGRAPH CO., Ltd., and BRAILSFORD, J. D. Feb. 3, 1936, No. 3267. [Class 40 (v)] The gain of an amplifier is controlled by varying an impedance connected across one of two channels the outputs of which are combined in opposition. As shown one channel comprises the valves 9, 12 and the other, the valve 7 the inputs and outputs of the two channels being connected in parallel. The variable impedance comprises a valve 10 connected across the input circuit of valve 12, its impedance being controlled manually or automatically by variation of its grid bias. The inputs and outputs of the two channels may alternatively be connected in push-pull and the amplifying valves are preferably of the screen-grid electron beam type such as described in Specification 403,973. The valve 10 may be replaced by an electro-mechanically controlled impedance or a temperature responsive resistance. A phase shifting network may be included in the anode circuit of valve 7 to compensate for that introduced in the other channel, Fig. 4 (not shown).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB326736A GB469895A (en) | 1936-02-03 | 1936-02-03 | Improvements in or relating to gain control arrangements for valve amplifiers and the like |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB326736A GB469895A (en) | 1936-02-03 | 1936-02-03 | Improvements in or relating to gain control arrangements for valve amplifiers and the like |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB469895A true GB469895A (en) | 1937-08-03 |
Family
ID=9755100
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB326736A Expired GB469895A (en) | 1936-02-03 | 1936-02-03 | Improvements in or relating to gain control arrangements for valve amplifiers and the like |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB469895A (en) |
-
1936
- 1936-02-03 GB GB326736A patent/GB469895A/en not_active Expired
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