JPS5639605A - Biasing circuit of amplifier - Google Patents

Biasing circuit of amplifier

Info

Publication number
JPS5639605A
JPS5639605A JP11466379A JP11466379A JPS5639605A JP S5639605 A JPS5639605 A JP S5639605A JP 11466379 A JP11466379 A JP 11466379A JP 11466379 A JP11466379 A JP 11466379A JP S5639605 A JPS5639605 A JP S5639605A
Authority
JP
Japan
Prior art keywords
elements
output
electric currents
flowing
current
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.)
Pending
Application number
JP11466379A
Other languages
Japanese (ja)
Inventor
Masayuki Iwamatsu
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.)
Nippon Gakki Co Ltd
Original Assignee
Nippon Gakki 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 Nippon Gakki Co Ltd filed Critical Nippon Gakki Co Ltd
Priority to JP11466379A priority Critical patent/JPS5639605A/en
Priority to US06/181,619 priority patent/US4356452A/en
Publication of JPS5639605A publication Critical patent/JPS5639605A/en
Pending 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
    • H03F1/30—Modifications of amplifiers to reduce influence of variations of temperature or supply voltage or other physical parameters
    • H03F1/302—Modifications of amplifiers to reduce influence of variations of temperature or supply voltage or other physical parameters in bipolar transistor amplifiers

Landscapes

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

Abstract

PURPOSE:To make electric currents, flowing through amplifying elements providing push-pull operation, similar to output electric current, by keeping the sum of the electric currents of the amplifying elements invariably constant in the output stage of an A-class complementary push-pull amplifier. CONSTITUTION:In case that out-of-phase signals are applied to input terminals 21 and 22, fluctuations of flowing current IN+IP, when emitter currents IN and IP of transistor TRs 23 and 24 fluctuate, are detected by detecting circuit 31. On the basis of the output of this circuit 31, bias voltages applied to elements 23 and 24 are brought under the control of bias setting circuit 33. Thus, the sum of electric currents flowing through elements 23 and 24 is held invariably constant and the electric currents through elements 23 and 24 can be made similar to the output current.
JP11466379A 1979-09-06 1979-09-06 Biasing circuit of amplifier Pending JPS5639605A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP11466379A JPS5639605A (en) 1979-09-06 1979-09-06 Biasing circuit of amplifier
US06/181,619 US4356452A (en) 1979-09-06 1980-08-26 Class A push-pull amplifier with bias controlling circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11466379A JPS5639605A (en) 1979-09-06 1979-09-06 Biasing circuit of amplifier

Publications (1)

Publication Number Publication Date
JPS5639605A true JPS5639605A (en) 1981-04-15

Family

ID=14643452

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11466379A Pending JPS5639605A (en) 1979-09-06 1979-09-06 Biasing circuit of amplifier

Country Status (1)

Country Link
JP (1) JPS5639605A (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4996660A (en) * 1973-01-13 1974-09-12
JPS4996658A (en) * 1973-01-13 1974-09-12

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4996660A (en) * 1973-01-13 1974-09-12
JPS4996658A (en) * 1973-01-13 1974-09-12

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