GB616699A - Improvements in or relating to automatic gain control circuits in thermionic valve amplifiers - Google Patents
Improvements in or relating to automatic gain control circuits in thermionic valve amplifiersInfo
- Publication number
- GB616699A GB616699A GB20437/45A GB2043745A GB616699A GB 616699 A GB616699 A GB 616699A GB 20437/45 A GB20437/45 A GB 20437/45A GB 2043745 A GB2043745 A GB 2043745A GB 616699 A GB616699 A GB 616699A
- Authority
- GB
- United Kingdom
- Prior art keywords
- gain control
- automatic gain
- limiter
- relating
- control 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
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G7/00—Volume compression or expansion in amplifiers
- H03G7/02—Volume compression or expansion in amplifiers having discharge tubes
Landscapes
- Control Of Amplification And Gain Control (AREA)
Abstract
616,699. Automatic gain control. SOC. ALSACIENNE DE CONSTRUCTIONS MECANIQUES. Aug. 9, 1945, No. 20437. Convention date, Feb. 17, 1944. [Class 40 (v)] In a push-pull amplifier provided with automatic gain control, a limiter is connected in shunt with the signal channel in order to avoid instability when a, strong signal is suddenly applied. The gain of the stage 1 in a push-pull amplifier is controlled from a rectifier 7. which is fed from the output transformer 5, a delay bias being applied via the terminal 11. The limiter 8 is connected across the primary of the transformer 5 and is given a greater bias via the terminal 18. The biasses may be adjusted while maintained in constant ratio by utilizing the voltage drop across two resistances carrying the same adjustable current. The time-constant of the limiter network 17 is perferably shorter than that of the rectifier load 13.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR616699X | 1944-02-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB616699A true GB616699A (en) | 1949-01-26 |
Family
ID=8981776
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB20437/45A Expired GB616699A (en) | 1944-02-17 | 1945-08-09 | Improvements in or relating to automatic gain control circuits in thermionic valve amplifiers |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB616699A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3200346A (en) * | 1962-08-21 | 1965-08-10 | Adage Inc | Overload protection circuit for high impedance amplifiers |
-
1945
- 1945-08-09 GB GB20437/45A patent/GB616699A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3200346A (en) * | 1962-08-21 | 1965-08-10 | Adage Inc | Overload protection circuit for high impedance amplifiers |
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