GB696848A - Improvements in and relating to electron discharge valve amplifiers - Google Patents

Improvements in and relating to electron discharge valve amplifiers

Info

Publication number
GB696848A
GB696848A GB847151A GB847151A GB696848A GB 696848 A GB696848 A GB 696848A GB 847151 A GB847151 A GB 847151A GB 847151 A GB847151 A GB 847151A GB 696848 A GB696848 A GB 696848A
Authority
GB
United Kingdom
Prior art keywords
valve
output
anode
negative feed
cathode
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
GB847151A
Inventor
Sidney Dundas Berry
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.)
British Broadcasting Corp
Original Assignee
British Broadcasting Corp
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 British Broadcasting Corp filed Critical British Broadcasting Corp
Priority to GB847151A priority Critical patent/GB696848A/en
Publication of GB696848A publication Critical patent/GB696848A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers
    • H03G3/02—Manually-operated control
    • H03G3/04—Manually-operated control in untuned amplifiers
    • H03G3/06—Manually-operated control in untuned amplifiers having discharge tubes
    • H03G3/08—Manually-operated control in untuned amplifiers having discharge tubes incorporating negative feedback

Landscapes

  • Adjustable Resistors (AREA)

Abstract

696,848. Valve amplifying circuits. BRITISH BROADCASTING CORPORATION. March 31, 1952 [April 11, 1951], No. 8471/51. Classes 40 (v) and 40 (vi). Gain control in an amplifier is effected by applying a negative feed-back voltage derived from a high impedance in the anode-cathode path of the final valve to the adjustable tap on a high impedance potentiometer connected between one output terminal of the amplifier and a small resistance in the grid-cathode circuit of an earlier valve. As shown, the potentiometer is connected between the cathode resistor R3 and the output terminal T, the negative feed-back and output voltages being obtained from a resistor R4 in the anode circuit. Upward movement of the slider decreases the proportion of the voltage fed to the output, increases the negative feed-back and reduces the effective value of the anode load of the final valve. Additional stages may be interposed between the two valves. Zero output when the slider is in the uppermost position may be ensured by combining the control with an on-off switch which becomes effective in the uppermost position.
GB847151A 1951-04-11 1951-04-11 Improvements in and relating to electron discharge valve amplifiers Expired GB696848A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB847151A GB696848A (en) 1951-04-11 1951-04-11 Improvements in and relating to electron discharge valve amplifiers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB847151A GB696848A (en) 1951-04-11 1951-04-11 Improvements in and relating to electron discharge valve amplifiers

Publications (1)

Publication Number Publication Date
GB696848A true GB696848A (en) 1953-09-09

Family

ID=9853099

Family Applications (1)

Application Number Title Priority Date Filing Date
GB847151A Expired GB696848A (en) 1951-04-11 1951-04-11 Improvements in and relating to electron discharge valve amplifiers

Country Status (1)

Country Link
GB (1) GB696848A (en)

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