GB516286A - Improvements in tone-control circuits for audio-frequency amplifiers - Google Patents
Improvements in tone-control circuits for audio-frequency amplifiersInfo
- Publication number
- GB516286A GB516286A GB1827338A GB1827338A GB516286A GB 516286 A GB516286 A GB 516286A GB 1827338 A GB1827338 A GB 1827338A GB 1827338 A GB1827338 A GB 1827338A GB 516286 A GB516286 A GB 516286A
- Authority
- GB
- United Kingdom
- Prior art keywords
- tone
- audio
- control circuits
- frequency amplifiers
- condenser
- 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
- H03G5/00—Tone control or bandwidth control in amplifiers
- H03G5/02—Manually-operated control
- H03G5/04—Manually-operated control in untuned amplifiers
- H03G5/06—Manually-operated control in untuned amplifiers having discharge tubes
- H03G5/08—Manually-operated control in untuned amplifiers having discharge tubes incorporating negative feedback
Landscapes
- Tone Control, Compression And Expansion, Limiting Amplitude (AREA)
Abstract
516,286. Valve amplifying circuits. MULLARD RADIO VALVE CO., Ltd., and CLARK, R. G. June 20, 1938, No. 18373. [Class 40 (v)] Negative feedback is provided from a variable combination of mixed impedances so arranged as to give a variable high frequency cut-off and a substantially constant rate of attenuation above the cut-off frequency. As shown in Fig. 2, the tone control comprises adjustable resistance R1 and condenser C1 which are bridged across the output circuit R5, T. Feedback is provided from R1 to potentiometer R3, R4 as indicated. In Fig. 3 the tone control comprises condenser C5 and adjustable resistance R10, the junction between C5 an R10 being connected to the lower end of load resistance R7 of the detector circuit.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1827338A GB516286A (en) | 1938-06-20 | 1938-06-20 | Improvements in tone-control circuits for audio-frequency amplifiers |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1827338A GB516286A (en) | 1938-06-20 | 1938-06-20 | Improvements in tone-control circuits for audio-frequency amplifiers |
Publications (1)
Publication Number | Publication Date |
---|---|
GB516286A true GB516286A (en) | 1939-12-29 |
Family
ID=10109617
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1827338A Expired GB516286A (en) | 1938-06-20 | 1938-06-20 | Improvements in tone-control circuits for audio-frequency amplifiers |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB516286A (en) |
-
1938
- 1938-06-20 GB GB1827338A patent/GB516286A/en not_active Expired
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