JPS57184309A - Protecting circuit of amplifier - Google Patents

Protecting circuit of amplifier

Info

Publication number
JPS57184309A
JPS57184309A JP56070032A JP7003281A JPS57184309A JP S57184309 A JPS57184309 A JP S57184309A JP 56070032 A JP56070032 A JP 56070032A JP 7003281 A JP7003281 A JP 7003281A JP S57184309 A JPS57184309 A JP S57184309A
Authority
JP
Japan
Prior art keywords
electric power
circuit
amplifying stage
amplifier
stages
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
JP56070032A
Other languages
Japanese (ja)
Inventor
Kazuaki Nakayama
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.)
Pioneer Corp
Original Assignee
Pioneer Corp
Pioneer Electronic 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 Pioneer Corp, Pioneer Electronic Corp filed Critical Pioneer Corp
Priority to JP56070032A priority Critical patent/JPS57184309A/en
Publication of JPS57184309A publication Critical patent/JPS57184309A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To ensure the effective and assured protection for both an amplifier and a load, by detecting a fault of the amplifier, separating electrically a voltage amplifying stage from an electric power amplifying stage and cutting off the input supplied to the electric power amplifying stage.
CONSTITUTION: A separating/protecting circuit 3 is provided between a voltage amplifying stage 1 and an electric power amplifying stage 2 which supplies the voltage amplified output and amplifies the electric power to drive a load RL with the electric power in order to give the electrical cutoff between the stages 1 and 2. A trigger signal is produced to be applied to a control circuit 31 when an overcurrent detecting circuit 4 or an output offset detecting circuit 5 of the circuit 3 detects a fault. The circuit 31 works with the trigger signal, and as a result a short circuit is caused between a pair of outputs of the stage 1. Thus transistors Q1 and Q2 provided between the stages 1 and 2 are turned on to ensure the electrical separation between the stages 1 and 2. Thus the supply of electric power is cut off to the load RL.
COPYRIGHT: (C)1982,JPO&Japio
JP56070032A 1981-05-09 1981-05-09 Protecting circuit of amplifier Pending JPS57184309A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56070032A JPS57184309A (en) 1981-05-09 1981-05-09 Protecting circuit of amplifier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56070032A JPS57184309A (en) 1981-05-09 1981-05-09 Protecting circuit of amplifier

Publications (1)

Publication Number Publication Date
JPS57184309A true JPS57184309A (en) 1982-11-13

Family

ID=13419841

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56070032A Pending JPS57184309A (en) 1981-05-09 1981-05-09 Protecting circuit of amplifier

Country Status (1)

Country Link
JP (1) JPS57184309A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59144286A (en) * 1983-02-07 1984-08-18 Matsushita Electric Ind Co Ltd Sound muting circuit
JPS59187216U (en) * 1983-05-26 1984-12-12 横河電機株式会社 Current-limited feedback amplifier circuit

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59144286A (en) * 1983-02-07 1984-08-18 Matsushita Electric Ind Co Ltd Sound muting circuit
JPH0544233B2 (en) * 1983-02-07 1993-07-05 Matsushita Electric Ind Co Ltd
JPS59187216U (en) * 1983-05-26 1984-12-12 横河電機株式会社 Current-limited feedback amplifier circuit

Similar Documents

Publication Publication Date Title
EP0966086A3 (en) Integrated protection circuit, method of providing current-limiting and short-circuit protection and converter employing the same
JPS6455014A (en) Switching apparatus for avoiding leakage current
JPS57184309A (en) Protecting circuit of amplifier
JPS5485714A (en) Speaker protecting circuit
JPS553202A (en) Power amplifying device
JPS54161304A (en) Amplifying device
JPS5555605A (en) Protective circuit for power output circuit
JPS5780262A (en) Circuit for protecting short-circuting of output terminal of stabilized power circuit
JPS56144609A (en) Protective device for multiple-power-source power amplifying circuit
JPS5490523A (en) Transistorized protective circuit
JPS56122513A (en) Electric power supply system
JPS53131741A (en) Protective circuit for power amplifier
JPS5737912A (en) Electric power amplifying circuit
JPS5480052A (en) Protecting device for amplifier
JPS55143625A (en) Delay type current limiting circuit
JPS54161867A (en) Protective circuit
JPS5791679A (en) Protective circuit for power control element
JPS5775330A (en) Overload protecting device
JPS5455178A (en) Protecting device
JPS56108115A (en) Power supply unit
JPS5461403A (en) Power supply control circuit for booster
JPS5717033A (en) Voltage stabilizing circuit
JPS5778225A (en) Gate circuit for gate turn-off thyristor
JPS57194612A (en) Monitoring circuit for nonbreak amplifying circuit
JPS57201309A (en) Voice amplifying circuit