JPS5665513A - Agc circuit - Google Patents

Agc circuit

Info

Publication number
JPS5665513A
JPS5665513A JP14105279A JP14105279A JPS5665513A JP S5665513 A JPS5665513 A JP S5665513A JP 14105279 A JP14105279 A JP 14105279A JP 14105279 A JP14105279 A JP 14105279A JP S5665513 A JPS5665513 A JP S5665513A
Authority
JP
Japan
Prior art keywords
signal
input
voltage
output
reference voltage
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
JP14105279A
Other languages
Japanese (ja)
Inventor
Ryota Akiyama
Hiroshi Kurihara
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP14105279A priority Critical patent/JPS5665513A/en
Publication of JPS5665513A publication Critical patent/JPS5665513A/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
    • H03G3/20—Automatic control
    • H03G3/30—Automatic control in amplifiers having semiconductor devices
    • H03G3/3005—Automatic control in amplifiers having semiconductor devices in amplifiers suitable for low-frequencies, e.g. audio amplifiers

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Control Of Amplification And Gain Control (AREA)

Abstract

PURPOSE:To reduce the noise due to interruption of an input signal, by controlling the gain of an AGC amplifier with the pulse signal adding other reference voltage to the signal obtained through the integration of a pulse signal, when an input signal exceed the reference voltage. CONSTITUTION:A signal Sin inputted is distributed into the input side of an AGC amplifier 1 and the input side of a comparator 2, and the signal given to the input of the comparator 2 is compared with the reference V1 to output the pulse waveform equal to the width of a large amplitude signal in excess to the voltage V1 across the voltage V1. Next, this output is input to a low pass filter 3. Further, the output of the low pass filter 3 is inverted to obtain an AGC control voltage waveform by adding the reference voltage V2.
JP14105279A 1979-10-31 1979-10-31 Agc circuit Pending JPS5665513A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14105279A JPS5665513A (en) 1979-10-31 1979-10-31 Agc circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14105279A JPS5665513A (en) 1979-10-31 1979-10-31 Agc circuit

Publications (1)

Publication Number Publication Date
JPS5665513A true JPS5665513A (en) 1981-06-03

Family

ID=15283126

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14105279A Pending JPS5665513A (en) 1979-10-31 1979-10-31 Agc circuit

Country Status (1)

Country Link
JP (1) JPS5665513A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58221510A (en) * 1982-06-18 1983-12-23 Sony Corp Digital audio signal processor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58221510A (en) * 1982-06-18 1983-12-23 Sony Corp Digital audio signal processor
JPH0542178B2 (en) * 1982-06-18 1993-06-25 Sony Corp

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