JPS56100511A - Amplifying circuit - Google Patents

Amplifying circuit

Info

Publication number
JPS56100511A
JPS56100511A JP394980A JP394980A JPS56100511A JP S56100511 A JPS56100511 A JP S56100511A JP 394980 A JP394980 A JP 394980A JP 394980 A JP394980 A JP 394980A JP S56100511 A JPS56100511 A JP S56100511A
Authority
JP
Japan
Prior art keywords
output level
variable resistor
negative feedback
gain
adjusted
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
JP394980A
Other languages
Japanese (ja)
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 JP394980A priority Critical patent/JPS56100511A/en
Publication of JPS56100511A publication Critical patent/JPS56100511A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers
    • H03G3/02—Manually-operated control
    • H03G3/04—Manually-operated control in untuned amplifiers

Landscapes

  • Control Of Amplification And Gain Control (AREA)

Abstract

PURPOSE:To set the power source voltage to a low value while keeping the dynamic margin large, by reducing the gain of the negative feedback amplifier for a low output level and by increasing the gain of the negative feedback amplifier for a high output level. CONSTITUTION:The output of negative feedback amplifier 11 is given to the first and the second variable resistors 12 and 13 interlocked with each other. The feedback quantity is adjusted by the first variable resistor 12, and the output level is adjusted by the second vaiable resistor 13. If the output level is low, the feedback quantity is made maximum by the first variable resistor 12 to reduce the gain of negative feedback amplifier 11, and the output level is adjusted by the second variable resistor 13. Further, if the output level is high, the output level is made maximum by the second variable resistor 13, and the feedback quantity is adjusted by the first variable resistor 12 to increase the gain of negative feedback amplifier 11.
JP394980A 1980-01-17 1980-01-17 Amplifying circuit Pending JPS56100511A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP394980A JPS56100511A (en) 1980-01-17 1980-01-17 Amplifying circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP394980A JPS56100511A (en) 1980-01-17 1980-01-17 Amplifying circuit

Publications (1)

Publication Number Publication Date
JPS56100511A true JPS56100511A (en) 1981-08-12

Family

ID=11571358

Family Applications (1)

Application Number Title Priority Date Filing Date
JP394980A Pending JPS56100511A (en) 1980-01-17 1980-01-17 Amplifying circuit

Country Status (1)

Country Link
JP (1) JPS56100511A (en)

Similar Documents

Publication Publication Date Title
JPS5514725A (en) Error amplifier circuit
JPS5659321A (en) Constant-current regulated power circuit
ES478764A1 (en) Amplifier arrangement with variable gain factor
JPS5728410A (en) Voltage controlled type variable gain circuit
JPS6473168A (en) Ignition control circuit
JPS5287346A (en) Amplifying circuit
JPS55117971A (en) Level indication circuit
JPS5226145A (en) Automatic gain adjustment circuit
JPS574610A (en) Automatic gain controlling circuit
JPS5715511A (en) Variable attenuator
JPS5780816A (en) Voltage control variable gain circuit
JPS5753129A (en) Active filter
JPS5442964A (en) Automatic gain control circuit
JPS54154066A (en) Constant-voltage power supply circuit
JPS56143027A (en) Constant current circuit
JPS56168407A (en) Amplifier
JPS5535563A (en) Light reception circuit
JPS56157108A (en) Gain controlling device
JPS5690609A (en) Offset circuit
JPS5650604A (en) Feedback amplifier
ES344370A1 (en) Negative feedback amplifier having adjustable gain
JPS56104507A (en) Amplifier
JPS5253643A (en) Differential amplifier with source follower
JPS54154255A (en) Amplifier circuit
JPS55112009A (en) Bias circuit