JPS5585115A - Gain control and amplifying circuit - Google Patents

Gain control and amplifying circuit

Info

Publication number
JPS5585115A
JPS5585115A JP15963478A JP15963478A JPS5585115A JP S5585115 A JPS5585115 A JP S5585115A JP 15963478 A JP15963478 A JP 15963478A JP 15963478 A JP15963478 A JP 15963478A JP S5585115 A JPS5585115 A JP S5585115A
Authority
JP
Japan
Prior art keywords
amplifier
gain control
amplifying circuit
terminal
feedback 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.)
Granted
Application number
JP15963478A
Other languages
Japanese (ja)
Other versions
JPS5829001B2 (en
Inventor
Kenji Yokoyama
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 Gakki Co Ltd
Original Assignee
Nippon Gakki 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 Nippon Gakki Co Ltd filed Critical Nippon Gakki Co Ltd
Priority to JP53159634A priority Critical patent/JPS5829001B2/en
Publication of JPS5585115A publication Critical patent/JPS5585115A/en
Publication of JPS5829001B2 publication Critical patent/JPS5829001B2/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G1/00—Details of arrangements for controlling amplification
    • H03G1/0005—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal

Landscapes

  • Tone Control, Compression And Expansion, Limiting Amplitude (AREA)
  • Control Of Amplification And Gain Control (AREA)

Abstract

PURPOSE:To establish the gain control amplifying circuit operated with high performance independently of the characteristics of amplifier, by inserting the second amplifier to the negative feedback circuit of the first amplifier. CONSTITUTION:The input signal E1 from the terminal 13 is fed to the first amplifier 15 via the resistor R5 and outputted as the output E2 at the terminal 16. The second amplifier 19 and the first transistor 21 for gain control are inserted to the feedback circuit of the amplifier 15 and the second transistor 18 for gain control is inserted to the feedback circuit of the amplifier 19. Further, the gain of this circuit is determined with the expotential function of the DC voltage Vc1 fed to the control input terminal 22.
JP53159634A 1978-12-22 1978-12-22 gain control amplifier circuit Expired JPS5829001B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP53159634A JPS5829001B2 (en) 1978-12-22 1978-12-22 gain control amplifier circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP53159634A JPS5829001B2 (en) 1978-12-22 1978-12-22 gain control amplifier circuit

Publications (2)

Publication Number Publication Date
JPS5585115A true JPS5585115A (en) 1980-06-26
JPS5829001B2 JPS5829001B2 (en) 1983-06-20

Family

ID=15697990

Family Applications (1)

Application Number Title Priority Date Filing Date
JP53159634A Expired JPS5829001B2 (en) 1978-12-22 1978-12-22 gain control amplifier circuit

Country Status (1)

Country Link
JP (1) JPS5829001B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4471324A (en) * 1982-01-19 1984-09-11 Dbx, Inc. All NPN variably controlled amplifier

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4471324A (en) * 1982-01-19 1984-09-11 Dbx, Inc. All NPN variably controlled amplifier

Also Published As

Publication number Publication date
JPS5829001B2 (en) 1983-06-20

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