JPS5662409A - Power amplifier - Google Patents

Power amplifier

Info

Publication number
JPS5662409A
JPS5662409A JP13763779A JP13763779A JPS5662409A JP S5662409 A JPS5662409 A JP S5662409A JP 13763779 A JP13763779 A JP 13763779A JP 13763779 A JP13763779 A JP 13763779A JP S5662409 A JPS5662409 A JP S5662409A
Authority
JP
Japan
Prior art keywords
output
current
circuit
idling
set circuit
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.)
Granted
Application number
JP13763779A
Other languages
Japanese (ja)
Other versions
JPS6320043B2 (en
Inventor
Kunio Seki
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP13763779A priority Critical patent/JPS5662409A/en
Publication of JPS5662409A publication Critical patent/JPS5662409A/en
Publication of JPS6320043B2 publication Critical patent/JPS6320043B2/ja
Granted 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
    • H03F1/52—Circuit arrangements for protecting such amplifiers

Landscapes

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

Abstract

PURPOSE:To prevent the output transistor from being destroyed, by providing a diode to prevent a reverse current in a circuit for seting idling current. CONSTITUTION:An idling current set circuit 109 of an output stage transistor determines the bias voltage by taking the output point of an amplifier in BTL connection, to flow almost a given current to output transistors Q3-Q6. The idling current set circuit 109 includes a reverse current preventing diode D8. If a speaker of another channel is connected to the output terminal, the inversion of current which may cause destruction, through the idling current set circuit 105 is prevented for one of transistors forming the output of a half wave, which can not be compensated by an ASO detection circuit only.
JP13763779A 1979-10-26 1979-10-26 Power amplifier Granted JPS5662409A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13763779A JPS5662409A (en) 1979-10-26 1979-10-26 Power amplifier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13763779A JPS5662409A (en) 1979-10-26 1979-10-26 Power amplifier

Publications (2)

Publication Number Publication Date
JPS5662409A true JPS5662409A (en) 1981-05-28
JPS6320043B2 JPS6320043B2 (en) 1988-04-26

Family

ID=15203288

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13763779A Granted JPS5662409A (en) 1979-10-26 1979-10-26 Power amplifier

Country Status (1)

Country Link
JP (1) JPS5662409A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010159793A (en) * 2009-01-07 2010-07-22 Tatsuya Urayama Locking tool

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5218447A (en) * 1975-07-16 1977-02-12 Gen Electric Method of forming metallurgical joint
JPS52145744U (en) * 1976-04-28 1977-11-04

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5218447A (en) * 1975-07-16 1977-02-12 Gen Electric Method of forming metallurgical joint
JPS52145744U (en) * 1976-04-28 1977-11-04

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010159793A (en) * 2009-01-07 2010-07-22 Tatsuya Urayama Locking tool

Also Published As

Publication number Publication date
JPS6320043B2 (en) 1988-04-26

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