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GB936629A - Improvements in and relating to amplifiers employing transistors - Google Patents

Improvements in and relating to amplifiers employing transistors

Info

Publication number
GB936629A
GB936629A GB3382260A GB3382260A GB936629A GB 936629 A GB936629 A GB 936629A GB 3382260 A GB3382260 A GB 3382260A GB 3382260 A GB3382260 A GB 3382260A GB 936629 A GB936629 A GB 936629A
Authority
GB
United Kingdom
Prior art keywords
transistor
output
gain
relating
shunt
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
GB3382260A
Inventor
Frederick Arthur Inskip
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.)
SECR AVIATION
Minister of Aviation
Original Assignee
SECR AVIATION
Minister of Aviation
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 SECR AVIATION, Minister of Aviation filed Critical SECR AVIATION
Priority to GB3382260A priority Critical patent/GB936629A/en
Publication of GB936629A publication Critical patent/GB936629A/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
    • H03G3/3052—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
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G1/00—Details of arrangements for controlling amplification
    • H03G1/0005—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal
    • H03G1/0035—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal using continuously variable impedance elements
    • H03G1/0082—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal using continuously variable impedance elements using bipolar transistor-type devices

Landscapes

  • Control Of Amplification And Gain Control (AREA)
  • Amplifiers (AREA)

Abstract

936,629. Transistor amplifiers. MINISTER OF AVIATION. Jan. 3, 1962 [Oct. 3, 1960], No. 33822/60. Class 40 (6). The gain of a transistor cascade amplifier is controlled by an A.C. shunt across the output of the input stage. As described, automaticgain control is applied to an I.F. amplifier by applying the D.C. gain control signal derived from diode D to the base of a transistor TS, the emitter-collector path of which is in series with capacitor C to shunt the output from transistor TI. A resistor X, Fig. 1, or a further transistor, Fig. 2 (not shown), may be included between the input stages TI and the output stage TO to reduce the changes in capacitance in the output circuit with changes in gain. A variable impedance diode or a manuallyvariable resistor may alternatively be used as shunts in place of transistor TS.
GB3382260A 1960-10-03 1960-10-03 Improvements in and relating to amplifiers employing transistors Expired GB936629A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3382260A GB936629A (en) 1960-10-03 1960-10-03 Improvements in and relating to amplifiers employing transistors

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3382260A GB936629A (en) 1960-10-03 1960-10-03 Improvements in and relating to amplifiers employing transistors

Publications (1)

Publication Number Publication Date
GB936629A true GB936629A (en) 1963-09-11

Family

ID=10357905

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3382260A Expired GB936629A (en) 1960-10-03 1960-10-03 Improvements in and relating to amplifiers employing transistors

Country Status (1)

Country Link
GB (1) GB936629A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3368156A (en) * 1965-06-02 1968-02-06 Sylvania Electric Prod Automatic gain control circuits
JPS4731251U (en) * 1971-04-27 1972-12-08
JPS5112757A (en) * 1974-07-04 1976-01-31 Nippon Electric Co KOSHUHAZOFUKUKI
FR2485848A1 (en) * 1980-06-26 1981-12-31 Rca Corp INTERMEDIATE FREQUENCY AMPLIFIER FOR TELEVISION

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3368156A (en) * 1965-06-02 1968-02-06 Sylvania Electric Prod Automatic gain control circuits
JPS4731251U (en) * 1971-04-27 1972-12-08
JPS5112757A (en) * 1974-07-04 1976-01-31 Nippon Electric Co KOSHUHAZOFUKUKI
FR2485848A1 (en) * 1980-06-26 1981-12-31 Rca Corp INTERMEDIATE FREQUENCY AMPLIFIER FOR TELEVISION

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