JPS54161304A - Amplifying device - Google Patents

Amplifying device

Info

Publication number
JPS54161304A
JPS54161304A JP7008478A JP7008478A JPS54161304A JP S54161304 A JPS54161304 A JP S54161304A JP 7008478 A JP7008478 A JP 7008478A JP 7008478 A JP7008478 A JP 7008478A JP S54161304 A JPS54161304 A JP S54161304A
Authority
JP
Japan
Prior art keywords
output terminal
main voltage
main
potential
circuit
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
JP7008478A
Other languages
Japanese (ja)
Inventor
Ryuichi Kioka
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP7008478A priority Critical patent/JPS54161304A/en
Publication of JPS54161304A publication Critical patent/JPS54161304A/en
Pending legal-status Critical Current

Links

Landscapes

  • Amplifiers (AREA)

Abstract

PURPOSE: To prevent the DC potential at an output terminal from fluctuating by cutting off the bias current of an amplifier through a switching circuit when the main voltage is lower than a preset level.
CONSTITUTION: The input signals from the input terminal 1 of an amplifier 26, which as its positive and negative main terminals 22 and 25 supplied with an electric power, are amplified and fed from its output terminal 23 to a load 24. A main voltage detecting circuit 29 detects the main voltage and drives a switching circuit 28, when the main voltage is low, to cut off a bias circuit 29. On the other hand, when the main voltage is raised to such a level that the DC potential at the output terminal 23 grounded to the earth through the load 24 does not fluctuate, the circuit 29 is likewise rendered conductive so that the potential at the output terminal, which is instantly generated upon the closing and clocking operations of the main power, can be prevented from fluctuating.
COPYRIGHT: (C)1979,JPO&Japio
JP7008478A 1978-06-09 1978-06-09 Amplifying device Pending JPS54161304A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7008478A JPS54161304A (en) 1978-06-09 1978-06-09 Amplifying device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7008478A JPS54161304A (en) 1978-06-09 1978-06-09 Amplifying device

Publications (1)

Publication Number Publication Date
JPS54161304A true JPS54161304A (en) 1979-12-20

Family

ID=13421311

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7008478A Pending JPS54161304A (en) 1978-06-09 1978-06-09 Amplifying device

Country Status (1)

Country Link
JP (1) JPS54161304A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56123111A (en) * 1980-03-05 1981-09-28 Hitachi Ltd Muting circuit
JPS57117818U (en) * 1981-01-14 1982-07-21

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56123111A (en) * 1980-03-05 1981-09-28 Hitachi Ltd Muting circuit
JPS57117818U (en) * 1981-01-14 1982-07-21

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