JPS57184309A - Protecting circuit of amplifier - Google Patents
Protecting circuit of amplifierInfo
- 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
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
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)
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 |
-
1981
- 1981-05-09 JP JP56070032A patent/JPS57184309A/en active Pending
Cited By (3)
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 |
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