JPS57113604A - Protecting device for power amplifier - Google Patents
Protecting device for power amplifierInfo
- Publication number
- JPS57113604A JPS57113604A JP56000279A JP27981A JPS57113604A JP S57113604 A JPS57113604 A JP S57113604A JP 56000279 A JP56000279 A JP 56000279A JP 27981 A JP27981 A JP 27981A JP S57113604 A JPS57113604 A JP S57113604A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- power supply
- amplifier
- switching control
- control signal
- 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 prevent the secondary and ternary failures through the interruption of power, by detecting a failure signal of an amplifier and interrupting a switching control signal controlling the power supply, in an audio power amplifier having the power supply of a switching control system.
CONSTITUTION: An amplifier 2 receives power from a variable power supply circuit 3 controlled with a switching control circuit 4 to drive a speaker 5. If a failure takes place in the amplifier 2, a detection circuit 6 picks up a DC component of an output DC voltage and turns on a transistor (TR) 32 or 33 in accordance with the polarity (positive or negative). The detected output is inputted to a switching control signal interrupting circuit 9 via a driving circuit 7 to turn on a TR36 or 37. Thus, the control signal at the circuit 4 is interrupted, a TR12 or 13 in the circuit 3 turns off and the operation of the positive or negative variable power supply is stopped. The circuit 6 is constituted to detect an excessive current, and the stop state of the power supply circuit can be kept by latching the output through the provision of an FF.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56000279A JPS57113604A (en) | 1981-01-07 | 1981-01-07 | Protecting device for power amplifier |
US06/335,545 US4427951A (en) | 1981-01-07 | 1981-12-29 | Protective device for power amplifier |
DE3200112A DE3200112C2 (en) | 1981-01-07 | 1982-01-05 | Protective device for power amplifiers |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56000279A JPS57113604A (en) | 1981-01-07 | 1981-01-07 | Protecting device for power amplifier |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS57113604A true JPS57113604A (en) | 1982-07-15 |
Family
ID=11469459
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP56000279A Pending JPS57113604A (en) | 1981-01-07 | 1981-01-07 | Protecting device for power amplifier |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57113604A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5914865A (en) * | 1982-07-14 | 1984-01-25 | ヤマハ株式会社 | Production of wood club head for golf |
JP2011229099A (en) * | 2010-04-23 | 2011-11-10 | Onkyo Corp | Power supply control device |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS48102551A (en) * | 1972-04-04 | 1973-12-22 | ||
JPS5016582U (en) * | 1973-06-12 | 1975-02-21 | ||
JPS50147265A (en) * | 1974-05-15 | 1975-11-26 | ||
JPS52119149A (en) * | 1976-03-31 | 1977-10-06 | Sansui Electric Co | Amplifying device |
JPS5573112A (en) * | 1978-11-25 | 1980-06-02 | Mitsubishi Electric Corp | Power amplifying system |
-
1981
- 1981-01-07 JP JP56000279A patent/JPS57113604A/en active Pending
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS48102551A (en) * | 1972-04-04 | 1973-12-22 | ||
JPS5016582U (en) * | 1973-06-12 | 1975-02-21 | ||
JPS50147265A (en) * | 1974-05-15 | 1975-11-26 | ||
JPS52119149A (en) * | 1976-03-31 | 1977-10-06 | Sansui Electric Co | Amplifying device |
JPS5573112A (en) * | 1978-11-25 | 1980-06-02 | Mitsubishi Electric Corp | Power amplifying system |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5914865A (en) * | 1982-07-14 | 1984-01-25 | ヤマハ株式会社 | Production of wood club head for golf |
JPH0331475B2 (en) * | 1982-07-14 | 1991-05-07 | Yamaha Corp | |
JP2011229099A (en) * | 2010-04-23 | 2011-11-10 | Onkyo Corp | Power supply control device |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
GB1427065A (en) | Excess voltage protective circuits | |
JPS57124946A (en) | Pulse detection circuit | |
DE68923369D1 (en) | VOLTAGE CONTROL AND DISPLAY ARRANGEMENT. | |
TW353243B (en) | Charging apparatus | |
JPS56117409A (en) | Amplifying device | |
JPS57113604A (en) | Protecting device for power amplifier | |
JPS641480A (en) | Controller for system coupling inverter | |
JPS5597875A (en) | Transistor direct current power supply for welding | |
TW342473B (en) | Redundant-type stabilizing power supply device | |
JPS57176401A (en) | Malfunction preventing system for alarm circuit at input power supply application | |
JPS5762629A (en) | Detecting device for fault of thyristor circuit | |
JPS5647814A (en) | Temperature excessive rise preventing device of electric carpet | |
JPS5734217A (en) | Constant voltage apparatus | |
JPS5716579A (en) | Inverter device | |
JPS6460224A (en) | Excess current detection circuit for inverter device | |
JPS55157175A (en) | Acoustic device | |
JPS5746305A (en) | Controller of tape recorder | |
JPS57167063A (en) | Copying paper peeling device | |
JPS54102547A (en) | Control circuit for auxiliary power source | |
JPS57127214A (en) | Temperature controlling device | |
JPS5775330A (en) | Overload protecting device | |
JPS56124141A (en) | System controlling system for magnetic recording and reproducing device | |
JPS648837A (en) | Ac no-break power unit | |
JPS5467796A (en) | Change detection circuit | |
JPS57138294A (en) | Speaker driver |