GB865122A - Improvements in or relating to automatic gain control circuit arrangements - Google Patents

Improvements in or relating to automatic gain control circuit arrangements

Info

Publication number
GB865122A
GB865122A GB362158A GB362158A GB865122A GB 865122 A GB865122 A GB 865122A GB 362158 A GB362158 A GB 362158A GB 362158 A GB362158 A GB 362158A GB 865122 A GB865122 A GB 865122A
Authority
GB
United Kingdom
Prior art keywords
source
automatic gain
gain control
control circuit
relating
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
GB362158A
Inventor
Frank Colston Bennett
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.)
BAE Systems Electronics Ltd
Original Assignee
Marconis Wireless Telegraph 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 Marconis Wireless Telegraph Co Ltd filed Critical Marconis Wireless Telegraph Co Ltd
Priority to GB362158A priority Critical patent/GB865122A/en
Publication of GB865122A publication Critical patent/GB865122A/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 without distortion of the input signal
    • H03G3/20—Automatic control
    • H03G3/22—Automatic control in amplifiers having discharge tubes

Landscapes

  • Control Of Amplification And Gain Control (AREA)
  • Circuits Of Receivers In General (AREA)

Abstract

865,122. Automatic gain control arrangements. MARCONI'S WIRELESS TELEGRAPH CO. Ltd. Aug. 24, 1959 [Nov. 21, 1958], No. 37621/58. Class 40(5) In an automatic gain control circuit the D.C. output of a diode detector 6 is filtered by network 7 and applied to the base of a transistor 8, the emitter of which is taken to a source of adjustable reference potential comprising potentiometer 11 and source 10. The collector is connected via resistor 13 to a source of negative potential, the voltage drop across resistor 13 being smoothed by condenser 15 and comprising an amplified control voltage which controls the gain of I.F. stage 1. The arrangement may be used for the simultaneous control of the gain of a number of amplifiers by making the source of adjustable reference potential common to them all.
GB362158A 1958-11-21 1958-11-21 Improvements in or relating to automatic gain control circuit arrangements Expired GB865122A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB362158A GB865122A (en) 1958-11-21 1958-11-21 Improvements in or relating to automatic gain control circuit arrangements

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB362158A GB865122A (en) 1958-11-21 1958-11-21 Improvements in or relating to automatic gain control circuit arrangements

Publications (1)

Publication Number Publication Date
GB865122A true GB865122A (en) 1961-04-12

Family

ID=9761788

Family Applications (1)

Application Number Title Priority Date Filing Date
GB362158A Expired GB865122A (en) 1958-11-21 1958-11-21 Improvements in or relating to automatic gain control circuit arrangements

Country Status (1)

Country Link
GB (1) GB865122A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2403702A1 (en) * 1977-09-16 1979-04-13 Plessey Handel Investment Ag TV receiver circuit with tuner AGC - has comparator for comparing detected video output signal with reference signal to provide AGC signal
GB2143690A (en) * 1983-07-22 1985-02-13 Nec Corp Radio receiver with field intensity detector

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2403702A1 (en) * 1977-09-16 1979-04-13 Plessey Handel Investment Ag TV receiver circuit with tuner AGC - has comparator for comparing detected video output signal with reference signal to provide AGC signal
GB2143690A (en) * 1983-07-22 1985-02-13 Nec Corp Radio receiver with field intensity detector

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