JPS5741009A - Sound signal amplifying circuit - Google Patents

Sound signal amplifying circuit

Info

Publication number
JPS5741009A
JPS5741009A JP11733480A JP11733480A JPS5741009A JP S5741009 A JPS5741009 A JP S5741009A JP 11733480 A JP11733480 A JP 11733480A JP 11733480 A JP11733480 A JP 11733480A JP S5741009 A JPS5741009 A JP S5741009A
Authority
JP
Japan
Prior art keywords
reproduction
amplifier
microphone
case
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
JP11733480A
Other languages
Japanese (ja)
Other versions
JPS6134685B2 (en
Inventor
Yuzuru Inoue
Hiroyuki Hattori
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.)
Victor Company of Japan Ltd
Nippon Victor KK
Original Assignee
Victor Company of Japan Ltd
Nippon Victor 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 Victor Company of Japan Ltd, Nippon Victor KK filed Critical Victor Company of Japan Ltd
Priority to JP11733480A priority Critical patent/JPS5741009A/en
Publication of JPS5741009A publication Critical patent/JPS5741009A/en
Publication of JPS6134685B2 publication Critical patent/JPS6134685B2/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
    • H03F1/34—Negative-feedback-circuit arrangements with or without positive feedback

Landscapes

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

Abstract

PURPOSE:To obtain a satisfactory sound output in case of both monitoring and reproduction of a microphone, by applying voltage to a microphone amplifier nearest to the terminal from which a reproduction signal is outputted, at the time of reproduction, and applying no voltage to its prestage. CONSTITUTION:At the time of recording, when switches 101, 102 are connected to a contact (a), a sound signal from a microphone 2 is amplified by amplifiers 3a, 3b, and after that, is provided to a magnetic head 12, a part of which is monitored by an earphone 5 through a resistance R. At the time of reproduction, when the switches 101, 102 are connected to a contact (b), a switching circuit 4 is operated by a control signal from a switching control signal generating circuit 9, and the electric power supply to the amplifier 3a is cut off. In this case, the amplifier 3b is made an operating state. As a result, since the impedance at the output side of the amplifier 3b is increased, generation of distortion in case of reproduction and monitoring is prevented.
JP11733480A 1980-08-26 1980-08-26 Sound signal amplifying circuit Granted JPS5741009A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11733480A JPS5741009A (en) 1980-08-26 1980-08-26 Sound signal amplifying circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11733480A JPS5741009A (en) 1980-08-26 1980-08-26 Sound signal amplifying circuit

Publications (2)

Publication Number Publication Date
JPS5741009A true JPS5741009A (en) 1982-03-06
JPS6134685B2 JPS6134685B2 (en) 1986-08-08

Family

ID=14709144

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11733480A Granted JPS5741009A (en) 1980-08-26 1980-08-26 Sound signal amplifying circuit

Country Status (1)

Country Link
JP (1) JPS5741009A (en)

Also Published As

Publication number Publication date
JPS6134685B2 (en) 1986-08-08

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