JPS5541012A - Gain control circuit - Google Patents

Gain control circuit

Info

Publication number
JPS5541012A
JPS5541012A JP11360778A JP11360778A JPS5541012A JP S5541012 A JPS5541012 A JP S5541012A JP 11360778 A JP11360778 A JP 11360778A JP 11360778 A JP11360778 A JP 11360778A JP S5541012 A JPS5541012 A JP S5541012A
Authority
JP
Japan
Prior art keywords
gain
control circuit
gain control
voltage
changed
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
JP11360778A
Other languages
Japanese (ja)
Inventor
Shigeki Inoue
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP11360778A priority Critical patent/JPS5541012A/en
Publication of JPS5541012A publication Critical patent/JPS5541012A/en
Pending 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
    • H03G1/0017—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal the device being at least one of the amplifying solid-state elements
    • H03G1/0023—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal the device being at least one of the amplifying solid-state elements in emitter-coupled or cascode amplifiers

Landscapes

  • Control Of Amplification And Gain Control (AREA)
  • Stereophonic System (AREA)

Abstract

PURPOSE:To change the gain with the control through the use of digital control signal weighted with a given rule. CONSTITUTION:The digital output weighted with a given rule from the digital control signal generator 13 is converted into analog voltage with the D/A converter 14. The gain can be changed by controlling the amplitude of the base voltage V1 of one transistor 6 at least among the first and second transistors 6 and 7, by means of this voltage. When this gain control circuit is applied to volume adjustment, very suitable audio volume change can be obtained with a wide variety. Further, when it is applied to a STEREO, the audio volume of left and right can equally be changed.
JP11360778A 1978-09-18 1978-09-18 Gain control circuit Pending JPS5541012A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11360778A JPS5541012A (en) 1978-09-18 1978-09-18 Gain control circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11360778A JPS5541012A (en) 1978-09-18 1978-09-18 Gain control circuit

Publications (1)

Publication Number Publication Date
JPS5541012A true JPS5541012A (en) 1980-03-22

Family

ID=14616496

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11360778A Pending JPS5541012A (en) 1978-09-18 1978-09-18 Gain control circuit

Country Status (1)

Country Link
JP (1) JPS5541012A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5922303A (en) * 1982-07-28 1984-02-04 Tdk Corp Laminated inductor
US4885547A (en) * 1988-07-07 1989-12-05 Tektronix, Inc. Gain cell with digital control
US4929908A (en) * 1988-05-02 1990-05-29 Kubushiki Kaisha Toshiba Gain controllable amplifier circuit
JPH02238791A (en) * 1989-03-10 1990-09-21 Nikon Corp Gain adjustment device for color sequential color camera
US6191916B1 (en) 1998-03-30 2001-02-20 Tdk Corporation Thin film magnetic head and method of manufacturing the same
US6678942B1 (en) 1998-03-30 2004-01-20 Tdk Corporation Thin film magnetic head and method of manufacturing the same

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5922303A (en) * 1982-07-28 1984-02-04 Tdk Corp Laminated inductor
US4929908A (en) * 1988-05-02 1990-05-29 Kubushiki Kaisha Toshiba Gain controllable amplifier circuit
US4885547A (en) * 1988-07-07 1989-12-05 Tektronix, Inc. Gain cell with digital control
JPH02238791A (en) * 1989-03-10 1990-09-21 Nikon Corp Gain adjustment device for color sequential color camera
US6191916B1 (en) 1998-03-30 2001-02-20 Tdk Corporation Thin film magnetic head and method of manufacturing the same
US6678942B1 (en) 1998-03-30 2004-01-20 Tdk Corporation Thin film magnetic head and method of manufacturing the same

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