BR7908047A - Sistema amplificador com controle automatico de ganho - Google Patents

Sistema amplificador com controle automatico de ganho

Info

Publication number
BR7908047A
BR7908047A BR7908047A BR7908047A BR7908047A BR 7908047 A BR7908047 A BR 7908047A BR 7908047 A BR7908047 A BR 7908047A BR 7908047 A BR7908047 A BR 7908047A BR 7908047 A BR7908047 A BR 7908047A
Authority
BR
Brazil
Prior art keywords
gain control
automatic gain
amplifier system
amplifier
automatic
Prior art date
Application number
BR7908047A
Other languages
English (en)
Inventor
M Malchow
Original Assignee
Rca 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 Rca Corp filed Critical Rca Corp
Publication of BR7908047A publication Critical patent/BR7908047A/pt

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
    • H03G3/3052—Automatic control in amplifiers having semiconductor devices in bandpass amplifiers (H.F. or I.F.) or in frequency-changers used in a (super)heterodyne receiver
    • H03G3/3063—Automatic control in amplifiers having semiconductor devices in bandpass amplifiers (H.F. or I.F.) or in frequency-changers used in a (super)heterodyne receiver using at least one transistor as controlling device, the transistor being used as a variable impedance device
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R25/00—Electric hearing aids
    • H04R25/35—Electric hearing aids using translation techniques
    • H04R25/356—Amplitude, e.g. amplitude shift or compression
BR7908047A 1978-12-11 1979-12-10 Sistema amplificador com controle automatico de ganho BR7908047A (pt)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/968,443 US4249137A (en) 1978-12-11 1978-12-11 Amplifier system with AGC, as for an AM radio

Publications (1)

Publication Number Publication Date
BR7908047A true BR7908047A (pt) 1980-07-22

Family

ID=25514280

Family Applications (1)

Application Number Title Priority Date Filing Date
BR7908047A BR7908047A (pt) 1978-12-11 1979-12-10 Sistema amplificador com controle automatico de ganho

Country Status (7)

Country Link
US (1) US4249137A (pt)
JP (1) JPS5582520A (pt)
BR (1) BR7908047A (pt)
DE (1) DE2949779A1 (pt)
FR (1) FR2444366A1 (pt)
GB (1) GB2038576A (pt)
IT (1) IT1194600B (pt)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4731585A (en) * 1987-02-24 1988-03-15 Kabushiki Kaisha Toshiba Antenna coupling circuit for magnetic resonance imaging
JPH08307181A (ja) * 1995-05-09 1996-11-22 Sony Corp レベル制御回路
US5990750A (en) * 1998-03-16 1999-11-23 Lockheed Martin Corporation Amplifier and driver system with multichannel operation
US6259323B1 (en) 1999-12-17 2001-07-10 Nokia Mobile Phones Ltd. Gain control for low noise amplifier
US6873212B2 (en) * 2001-05-17 2005-03-29 Sige Semiconductor Inc. Integrated circuit radio frequency amplifier with notch filter
DE10039438C2 (de) * 2000-08-11 2002-06-20 Infineon Technologies Ag Zweistufiger Operationsverstärker
US8064176B2 (en) * 2007-04-06 2011-11-22 Intersil Americas Inc. EOS robust bipolar transient clamp
US11735902B2 (en) 2020-03-24 2023-08-22 Analog Devices International Unlimited Company Bipolar junction transistor heater circuit

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3143711A (en) * 1961-04-14 1964-08-04 Collins Radio Co Transistor amplifier cutoff means at high signal levels
US3264564A (en) * 1963-02-07 1966-08-02 Rca Corp Variable impedance device for transistor automatic gain control
US3421100A (en) * 1966-11-10 1969-01-07 Rca Corp Direct coupled amplifier including twostage automatic gain control
JPS5325628B2 (pt) * 1973-02-15 1978-07-27
JPS5630961B2 (pt) * 1973-09-10 1981-07-18
DE2701412C2 (de) * 1977-01-14 1985-07-25 Gerhard Prof. Dr.-Ing. 8012 Ottobrunn Flachenecker Empfangsanlage mit aktiver Antenne

Also Published As

Publication number Publication date
DE2949779A1 (de) 1980-06-19
US4249137A (en) 1981-02-03
GB2038576A (en) 1980-07-23
IT7927986A0 (it) 1979-12-07
FR2444366A1 (fr) 1980-07-11
IT1194600B (it) 1988-09-22
JPS5582520A (en) 1980-06-21

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