GB516286A - Improvements in tone-control circuits for audio-frequency amplifiers - Google Patents

Improvements in tone-control circuits for audio-frequency amplifiers

Info

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
Application number
GB1827338A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mullard Radio Valve Co Ltd
Original Assignee
Mullard Radio Valve Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mullard Radio Valve Co Ltd filed Critical Mullard Radio Valve Co Ltd
Priority to GB1827338A priority Critical patent/GB516286A/en
Publication of GB516286A publication Critical patent/GB516286A/en
Expired legal-status Critical Current

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.
GB1827338A 1938-06-20 1938-06-20 Improvements in tone-control circuits for audio-frequency amplifiers Expired GB516286A (en)

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)

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