GB951720A - High input impedance transistor amplifier - Google Patents

High input impedance transistor amplifier

Info

Publication number
GB951720A
GB951720A GB3628762A GB3628762A GB951720A GB 951720 A GB951720 A GB 951720A GB 3628762 A GB3628762 A GB 3628762A GB 3628762 A GB3628762 A GB 3628762A GB 951720 A GB951720 A GB 951720A
Authority
GB
United Kingdom
Prior art keywords
feed
input
input circuit
amplifier
series
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
GB3628762A
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.)
Bendix Corp
Original Assignee
Bendix 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 Bendix Corp filed Critical Bendix Corp
Publication of GB951720A publication Critical patent/GB951720A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/34—Negative-feedback-circuit arrangements with or without positive feedback
    • H03F1/347—Negative-feedback-circuit arrangements with or without positive feedback using transformers

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Amplifiers (AREA)

Abstract

951,720. Transistor amplifier circuits. BENDIX CORPORATION. Sept. 24, 1962 [Oct. 6, 1961], No. 36287/62. Heading H3T. A variable gain amplifier comprises two common emitter stages, a gain control potentiometer connected to the input circuit and two feed-back paths from the output to the input, one in series with the input circuit and one in shunt. In the Figure, the output of a radio receiver detector is applied through a tone control network 18 and a volume control potentiometer 16 to an amplifier 19, 26. Positive voltage feed-back is applied through a resistor 33 in shunt with the input circuit and negative voltage feed-back is applied through a resistor 34 in series with the input circuit to increase the input impedance as seen by the detector. Variation of the volume control potentiometer varies the positive feed-back from a maximum at the loudest setting to a minimum at the quietest. D.C. stability of the amplifier is increased by means of thermistors 27 and 29. In an alternative circuit (Fig. 4, not shown) coupling between the stages is effected by an auto-transformer and the negative feed-back is applied in series with the input through a feed-back transformer.
GB3628762A 1961-10-06 1962-09-24 High input impedance transistor amplifier Expired GB951720A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US14346961A 1961-10-06 1961-10-06

Publications (1)

Publication Number Publication Date
GB951720A true GB951720A (en) 1964-03-11

Family

ID=22504224

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3628762A Expired GB951720A (en) 1961-10-06 1962-09-24 High input impedance transistor amplifier

Country Status (2)

Country Link
DE (1) DE1170473B (en)
GB (1) GB951720A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010007177A1 (en) * 2008-07-17 2010-01-21 Stichting Imec Nederland Dual-loop feedback amplifying circuit
US11670447B2 (en) 2020-04-09 2023-06-06 Hamilton Sundstrand Corporation Autotransformer rectifier unit system

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE910427C (en) * 1941-03-12 1954-05-03 Siemens Ag Amplifier with double feedback
US2909623A (en) * 1957-06-27 1959-10-20 Bell Telephone Labor Inc Interlaced feedback amplifier

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010007177A1 (en) * 2008-07-17 2010-01-21 Stichting Imec Nederland Dual-loop feedback amplifying circuit
US8446217B2 (en) 2008-07-17 2013-05-21 Imec Dual-loop feedback amplifying circuit
US11670447B2 (en) 2020-04-09 2023-06-06 Hamilton Sundstrand Corporation Autotransformer rectifier unit system

Also Published As

Publication number Publication date
DE1170473B (en) 1964-05-21

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