JPS54129957A - Load protective circuit of amplifier - Google Patents

Load protective circuit of amplifier

Info

Publication number
JPS54129957A
JPS54129957A JP3777078A JP3777078A JPS54129957A JP S54129957 A JPS54129957 A JP S54129957A JP 3777078 A JP3777078 A JP 3777078A JP 3777078 A JP3777078 A JP 3777078A JP S54129957 A JPS54129957 A JP S54129957A
Authority
JP
Japan
Prior art keywords
circuit
delay
amplifier
memory unit
time
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
JP3777078A
Other languages
Japanese (ja)
Other versions
JPS592403B2 (en
Inventor
Hiroyasu Yamaguchi
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 JP53037770A priority Critical patent/JPS592403B2/en
Publication of JPS54129957A publication Critical patent/JPS54129957A/en
Publication of JPS592403B2 publication Critical patent/JPS592403B2/en
Expired 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
    • H03F1/30—Modifications of amplifiers to reduce influence of variations of temperature or supply voltage or other physical parameters
    • H03F1/305—Modifications of amplifiers to reduce influence of variations of temperature or supply voltage or other physical parameters in case of switching on or off of a power supply

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Amplifiers (AREA)

Abstract

PURPOSE:To prevent malfunction due to a pop noise at the time when the power supply is put to work, by providing a memory unit stored with cut-off operation on the basis of the abnormality detection signal of an amplifier and a method of inhibiting the memory unit from operating for a certain time by a delay method. CONSTITUTION:Once the abnormal DC potential of amplifier 11 or abnormality of power loss, heat load impendance, etc., is detected by DC detector 14 or PC detector 15, FF16 is set by the detection signal. By the set signal of FF16, relay driver circuit 19 is stopped and contact 12 is closed, thereby protecting speaker SP. Supplying a reset signal from reset circuit 17 to FF16 allows circuit 19 to operate after delay by delay circuit 20 for a certain time, and contact 12 is made, so that the circuit will become stationary. With the power switch opened, the same operation is performed. While delay circuit 20 is operating at the time of power feeding, inhibit circuit 18 inhibits the setting of FF16 of the memory unit, so that the malfunction of FF16 will be prevented which is caused by a pop noise.
JP53037770A 1978-03-31 1978-03-31 Amplifier load protection circuit Expired JPS592403B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP53037770A JPS592403B2 (en) 1978-03-31 1978-03-31 Amplifier load protection circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP53037770A JPS592403B2 (en) 1978-03-31 1978-03-31 Amplifier load protection circuit

Publications (2)

Publication Number Publication Date
JPS54129957A true JPS54129957A (en) 1979-10-08
JPS592403B2 JPS592403B2 (en) 1984-01-18

Family

ID=12506693

Family Applications (1)

Application Number Title Priority Date Filing Date
JP53037770A Expired JPS592403B2 (en) 1978-03-31 1978-03-31 Amplifier load protection circuit

Country Status (1)

Country Link
JP (1) JPS592403B2 (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4953751A (en) * 1972-09-28 1974-05-24

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4953751A (en) * 1972-09-28 1974-05-24

Also Published As

Publication number Publication date
JPS592403B2 (en) 1984-01-18

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