JPS5726911A - Amplifier - Google Patents

Amplifier

Info

Publication number
JPS5726911A
JPS5726911A JP10228280A JP10228280A JPS5726911A JP S5726911 A JPS5726911 A JP S5726911A JP 10228280 A JP10228280 A JP 10228280A JP 10228280 A JP10228280 A JP 10228280A JP S5726911 A JPS5726911 A JP S5726911A
Authority
JP
Japan
Prior art keywords
relay contact
turned
protection circuit
circuit
output terminal
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.)
Granted
Application number
JP10228280A
Other languages
Japanese (ja)
Other versions
JPS6115614B2 (en
Inventor
Hideki Sakano
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co Ltd
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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP10228280A priority Critical patent/JPS5726911A/en
Publication of JPS5726911A publication Critical patent/JPS5726911A/en
Publication of JPS6115614B2 publication Critical patent/JPS6115614B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/52—Circuit arrangements for protecting such amplifiers

Abstract

PURPOSE:To increase the sound quality characteristics, by inserting a relay contact controlled with a protection circuit, in series with a low resistance between a common emitter circuit and an output terminal of a differential pair transistors of a driving section. CONSTITUTION:When a power switch is applied, a relay contact RL2 is in make state with a protection circuit 14', and transistors (TR)Q2-Q5 of a driving stage 12 and TRsQ6-Q9 of an output stage 13 are conductive. The relay contact RL3 is turned on, the relay contact RL2 is turned off and the muting function is achieved. On the other hand, if a power amplifier is in failure, the relay contact RL2 is turned off with the protection circuit 14', and the TRsQ2-Q9 are nonconductive, the relay contact RL3 is turned on to by-pass the failure current. It is prevented to make unstable the base potential of the TRs Q6, Q7 of the output stage 13, by providing a resistor RX between an output terminal P and the bias circuit.
JP10228280A 1980-07-25 1980-07-25 Amplifier Granted JPS5726911A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10228280A JPS5726911A (en) 1980-07-25 1980-07-25 Amplifier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10228280A JPS5726911A (en) 1980-07-25 1980-07-25 Amplifier

Publications (2)

Publication Number Publication Date
JPS5726911A true JPS5726911A (en) 1982-02-13
JPS6115614B2 JPS6115614B2 (en) 1986-04-25

Family

ID=14323244

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10228280A Granted JPS5726911A (en) 1980-07-25 1980-07-25 Amplifier

Country Status (1)

Country Link
JP (1) JPS5726911A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6061823U (en) * 1983-10-04 1985-04-30 三洋電機株式会社 amplifier
JPS6257419U (en) * 1985-09-26 1987-04-09
JPH0633683U (en) * 1992-10-09 1994-05-06 ヤマヨ測定機株式会社 Ink pot
JPH081395U (en) * 1996-04-30 1996-09-17 シンワ測定株式会社 Ink bottle

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0516448U (en) * 1991-08-19 1993-03-02 三菱農機株式会社 All-wheel drive for tractor
JP6965646B2 (en) 2017-09-06 2021-11-10 株式会社ダイフク Transport vehicle and transport equipment

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6061823U (en) * 1983-10-04 1985-04-30 三洋電機株式会社 amplifier
JPH0314813Y2 (en) * 1983-10-04 1991-04-02
JPS6257419U (en) * 1985-09-26 1987-04-09
JPH0411378Y2 (en) * 1985-09-26 1992-03-23
JPH0633683U (en) * 1992-10-09 1994-05-06 ヤマヨ測定機株式会社 Ink pot
JPH081395U (en) * 1996-04-30 1996-09-17 シンワ測定株式会社 Ink bottle

Also Published As

Publication number Publication date
JPS6115614B2 (en) 1986-04-25

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