JPS5480052A - Protecting device for amplifier - Google Patents
Protecting device for amplifierInfo
- Publication number
- JPS5480052A JPS5480052A JP14763377A JP14763377A JPS5480052A JP S5480052 A JPS5480052 A JP S5480052A JP 14763377 A JP14763377 A JP 14763377A JP 14763377 A JP14763377 A JP 14763377A JP S5480052 A JPS5480052 A JP S5480052A
- Authority
- JP
- Japan
- Prior art keywords
- amplifier
- circuit
- output terminal
- output
- protective
- 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
Landscapes
- Amplifiers (AREA)
Abstract
PURPOSE: To ensure a quick protective action to the amplifier in an extremely accurate way by controlling the protective circuit of the detector circuit which detects the fault occurring at the output circuit of the direct-coupled amplifier.
CONSTITUTION: The emitter is connected to output terminal O1 and O2 of balanced direct-coupled amplifier PA as well as to the load of serial resistor R13 and R14 inserted between load L, and the fixed bias voltage is applied to the base. At the same time, transistors Q11∼Q13 are provided to produce the detection output from the collector. Diode D11 and D12 connected so as to be in the forward direction to the base current are connected between the transistor base and the output terminal side of R13 and R14. Detector circuit DT of such constitution is provided every output terminal of amplifier PA. Then protective circuit PT is controlled by the detection output of circuit DT, thus ensuring the protective action to amplifier PA in a quick and extremely assured way.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14763377A JPS5480052A (en) | 1977-12-08 | 1977-12-08 | Protecting device for amplifier |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14763377A JPS5480052A (en) | 1977-12-08 | 1977-12-08 | Protecting device for amplifier |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5480052A true JPS5480052A (en) | 1979-06-26 |
Family
ID=15434735
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP14763377A Pending JPS5480052A (en) | 1977-12-08 | 1977-12-08 | Protecting device for amplifier |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5480052A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS566508A (en) * | 1979-06-29 | 1981-01-23 | Hitachi Ltd | Ground-fault detecting circuit for btl amplifier |
-
1977
- 1977-12-08 JP JP14763377A patent/JPS5480052A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS566508A (en) * | 1979-06-29 | 1981-01-23 | Hitachi Ltd | Ground-fault detecting circuit for btl amplifier |
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