GB739342A - Circuit arrangement for audio frequency amplifiers with forward-acting gain control - Google Patents
Circuit arrangement for audio frequency amplifiers with forward-acting gain controlInfo
- Publication number
- GB739342A GB739342A GB1835/54A GB183554A GB739342A GB 739342 A GB739342 A GB 739342A GB 1835/54 A GB1835/54 A GB 1835/54A GB 183554 A GB183554 A GB 183554A GB 739342 A GB739342 A GB 739342A
- Authority
- GB
- United Kingdom
- Prior art keywords
- gain control
- potential
- audio frequency
- circuit arrangement
- frequency amplifiers
- 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
- H03G3/00—Gain control in amplifiers or frequency changers
- H03G3/20—Automatic control
- H03G3/22—Automatic control in amplifiers having discharge tubes
Landscapes
- Amplifiers (AREA)
- Control Of Amplification And Gain Control (AREA)
Abstract
739,342. Automatic gain control. STANDARD TELEPHONES & CABLES, Ltd. Jan. 21, 1954 [Feb. 4, 1953], No. 1835/54. Class 40 (5). In a low-frequency amplifier, comprising the amplifier section of a tuning-indicator tube to which forward-acting gain control is applied, a limiter is used to restrict the applied gaincontrol voltage to a predetermined maximum value. Signals are applied to the valve via terminal 1, and the gain-control potential from terminal 2, via resistors RG, R5 and R3. A rectifier D1 is connected from the join of resistors R3, R5 to a negative potential source, via resistors R1, R2 and clamps the grid potential to a predetermined value upon the gain control potential becoming sufficiently negative to cause conduction in the rectifier.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT739342X | 1953-02-04 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB739342A true GB739342A (en) | 1955-10-26 |
Family
ID=3680239
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1835/54A Expired GB739342A (en) | 1953-02-04 | 1954-01-21 | Circuit arrangement for audio frequency amplifiers with forward-acting gain control |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB739342A (en) |
-
1954
- 1954-01-21 GB GB1835/54A patent/GB739342A/en not_active Expired
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