GB1445338A - Automatic gain control circuit arrangements having a plurality of stages of amplification - Google Patents

Automatic gain control circuit arrangements having a plurality of stages of amplification

Info

Publication number
GB1445338A
GB1445338A GB4248772A GB4248772A GB1445338A GB 1445338 A GB1445338 A GB 1445338A GB 4248772 A GB4248772 A GB 4248772A GB 4248772 A GB4248772 A GB 4248772A GB 1445338 A GB1445338 A GB 1445338A
Authority
GB
United Kingdom
Prior art keywords
gain control
automatic gain
amplifier
amplification
stages
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
GB4248772A
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.)
Ferranti International PLC
Original Assignee
Ferranti PLC
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 Ferranti PLC filed Critical Ferranti PLC
Priority to GB4248772A priority Critical patent/GB1445338A/en
Priority to DE19732344589 priority patent/DE2344589A1/en
Priority to FR7332630A priority patent/FR2199229B1/fr
Priority to JP10177973A priority patent/JPS4994254A/ja
Priority to US05/580,566 priority patent/US4001694A/en
Publication of GB1445338A publication Critical patent/GB1445338A/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
    • H03G3/20—Automatic control
    • H03G3/30—Automatic control in amplifiers having semiconductor devices
    • H03G3/3005—Automatic control in amplifiers having semiconductor devices in amplifiers suitable for low-frequencies, e.g. audio amplifiers

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Control Of Amplification And Gain Control (AREA)
  • Circuits Of Receivers In General (AREA)

Abstract

1445338 Automatic gain control FERRANTI Ltd 12 Sept 1973 [13 Sept 1972] 42487/72 Heading H3T In an automatic gain control arrangement, an amplifier 22 the gain of which is proportional to its supply voltage, derives its supply from a potentiometer comprising a fixed impedance 25 and an impedance 23 which varies with signal level: the arrangement comprises a radio receiver, the amplifier 22 being an R.F. amplifier and the variable impedance 23 a transistor acting as detector and audio stage. The fixed impedance 25 may comprise an earphone, ultrasonic transducer, or actuator rod, e.g. for controlling models. Capacitor 24 smooths variations of the supply to amplifier 22.
GB4248772A 1972-09-13 1972-09-13 Automatic gain control circuit arrangements having a plurality of stages of amplification Expired GB1445338A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
GB4248772A GB1445338A (en) 1972-09-13 1972-09-13 Automatic gain control circuit arrangements having a plurality of stages of amplification
DE19732344589 DE2344589A1 (en) 1972-09-13 1973-09-04 AUTOMATIC GAIN CONTROL SWITCH
FR7332630A FR2199229B1 (en) 1972-09-13 1973-09-11
JP10177973A JPS4994254A (en) 1972-09-13 1973-09-11
US05/580,566 US4001694A (en) 1972-09-13 1975-05-27 Automatic gain control circuit arrangements having a plurality of stages of amplification

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4248772A GB1445338A (en) 1972-09-13 1972-09-13 Automatic gain control circuit arrangements having a plurality of stages of amplification

Publications (1)

Publication Number Publication Date
GB1445338A true GB1445338A (en) 1976-08-11

Family

ID=10424655

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4248772A Expired GB1445338A (en) 1972-09-13 1972-09-13 Automatic gain control circuit arrangements having a plurality of stages of amplification

Country Status (4)

Country Link
JP (1) JPS4994254A (en)
DE (1) DE2344589A1 (en)
FR (1) FR2199229B1 (en)
GB (1) GB1445338A (en)

Also Published As

Publication number Publication date
FR2199229A1 (en) 1974-04-05
FR2199229B1 (en) 1977-08-05
JPS4994254A (en) 1974-09-06
DE2344589A1 (en) 1974-03-21

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees