JPS5480052A - Protecting device for amplifier - Google Patents

Protecting device for amplifier

Info

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
Application number
JP14763377A
Other languages
Japanese (ja)
Inventor
Kunio Seki
Reisuke Sato
Hiroo Adachi
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
Pioneer Corp
Original Assignee
Hitachi Ltd
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 Hitachi Ltd, Pioneer Electronic Corp filed Critical Hitachi Ltd
Priority to JP14763377A priority Critical patent/JPS5480052A/en
Publication of JPS5480052A publication Critical patent/JPS5480052A/en
Pending legal-status Critical Current

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
JP14763377A 1977-12-08 1977-12-08 Protecting device for amplifier Pending JPS5480052A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (1)

* Cited by examiner, † Cited by third party
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

Similar Documents

Publication Publication Date Title
JPS5446451A (en) Detector for overload of amplifier
JPS6438812A (en) Voltage adjusting circuit
JPS5518118A (en) Transistor power amplifier circuit
JPS5480052A (en) Protecting device for amplifier
JPS5425145A (en) Detection circuit for unbalanced dc voltage of output amplifier on two-power- supply system
JPS5597619A (en) Reference signal generating circuit
JPS5794819A (en) Current control system of constant voltage circuit
JPS53147943A (en) Ground fault detector
US3484708A (en) Current driver with overload protection
JPS5555605A (en) Protective circuit for power output circuit
JPS56144609A (en) Protective device for multiple-power-source power amplifying circuit
JPS5490523A (en) Transistorized protective circuit
JPS5775330A (en) Overload protecting device
JPS5529735A (en) Temperature detection unit
JPS5780812A (en) Amplifier with protection function for output short- circuit
JPS5490549A (en) Dc stabilized power source device
JPS5780262A (en) Circuit for protecting short-circuting of output terminal of stabilized power circuit
JPS55132113A (en) Power amplifying circuit
JPS5721106A (en) Overcurrent protection circuit
JPS5666911A (en) Protection circuit for amplifier
JPS57184309A (en) Protecting circuit of amplifier
JPS5717033A (en) Voltage stabilizing circuit
JPS5616311A (en) Transistor circuit
JPS5483353A (en) Protective circuit of amplifier
JPS5490550A (en) Power source stabilization circuit