JPS51147906A - Pre-amplifier - Google Patents

Pre-amplifier

Info

Publication number
JPS51147906A
JPS51147906A JP7253975A JP7253975A JPS51147906A JP S51147906 A JPS51147906 A JP S51147906A JP 7253975 A JP7253975 A JP 7253975A JP 7253975 A JP7253975 A JP 7253975A JP S51147906 A JPS51147906 A JP S51147906A
Authority
JP
Japan
Prior art keywords
amplifier
inputed
microphone
preset level
automatically stop
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
JP7253975A
Other languages
Japanese (ja)
Inventor
Sumio Komatsu
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.)
NIPPON DENON KK
Original Assignee
NIPPON DENON KK
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 NIPPON DENON KK filed Critical NIPPON DENON KK
Priority to JP7253975A priority Critical patent/JPS51147906A/en
Publication of JPS51147906A publication Critical patent/JPS51147906A/en
Pending legal-status Critical Current

Links

Landscapes

  • Control Of Amplification And Gain Control (AREA)
  • Amplifiers (AREA)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)

Abstract

PURPOSE: A pre-amplifier adapted to automatically stop its amplifier function when a signal lower than a preset level is inputed to a microphone.
COPYRIGHT: (C)1976,JPO&Japio
JP7253975A 1975-06-13 1975-06-13 Pre-amplifier Pending JPS51147906A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7253975A JPS51147906A (en) 1975-06-13 1975-06-13 Pre-amplifier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7253975A JPS51147906A (en) 1975-06-13 1975-06-13 Pre-amplifier

Publications (1)

Publication Number Publication Date
JPS51147906A true JPS51147906A (en) 1976-12-18

Family

ID=13492247

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7253975A Pending JPS51147906A (en) 1975-06-13 1975-06-13 Pre-amplifier

Country Status (1)

Country Link
JP (1) JPS51147906A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5934729A (en) * 1982-08-20 1984-02-25 Mitsubishi Electric Corp Power saving type communication equipment
JPH0272707A (en) * 1988-09-08 1990-03-13 Matsushita Electric Ind Co Ltd Automatic amplitude setting circuit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5934729A (en) * 1982-08-20 1984-02-25 Mitsubishi Electric Corp Power saving type communication equipment
JPH0272707A (en) * 1988-09-08 1990-03-13 Matsushita Electric Ind Co Ltd Automatic amplitude setting circuit

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