KR930005340A - Automatic Gain Control Circuit - Google Patents

Automatic Gain Control Circuit Download PDF

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Publication number
KR930005340A
KR930005340A KR1019910015245A KR910015245A KR930005340A KR 930005340 A KR930005340 A KR 930005340A KR 1019910015245 A KR1019910015245 A KR 1019910015245A KR 910015245 A KR910015245 A KR 910015245A KR 930005340 A KR930005340 A KR 930005340A
Authority
KR
South Korea
Prior art keywords
gain
signal
gain control
amplifier
automatic gain
Prior art date
Application number
KR1019910015245A
Other languages
Korean (ko)
Other versions
KR950003712B1 (en
Inventor
임수빈
Original Assignee
정용문
삼성전자 주식회사
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 정용문, 삼성전자 주식회사 filed Critical 정용문
Priority to KR1019910015245A priority Critical patent/KR950003712B1/en
Publication of KR930005340A publication Critical patent/KR930005340A/en
Application granted granted Critical
Publication of KR950003712B1 publication Critical patent/KR950003712B1/en

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Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers
    • H03G3/20—Automatic control

Landscapes

  • Control Of Amplification And Gain Control (AREA)
  • Circuits Of Receivers In General (AREA)

Abstract

내용 없음.No content.

Description

자동이득조절회로Automatic Gain Control Circuit

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제2도는 본 발명에 따른 자동이득조절회로의 실시예를 나타내는 회로도이다.2 is a circuit diagram showing an embodiment of an automatic gain control circuit according to the present invention.

Claims (2)

공중선에서 유입된 고주파수신신호를 증폭하기 위한 고주파증폭기(100)와, 증폭된 고주파수신신호를 중간주파수대역으로 천이시키기 위한 주파수변환기(200)와, 주파수변환기(200)의 출력신호를 이득제어하기 위한 자동이득조절기(300)와, 자동이득조절기(300)에서 이득조절된 신호를 복조하는 복조기(400)를 구비한 통신시스템의 수신장치에 있어서; 상기 자동이득조절기(300)는 상기 주파수변환기의 출력신호를 이득조정전압에 의해 증폭하는 자동이득증폭기(10)와, 상기 자동이득증폭기(10)의 출력신호의 크기에 따라 시간적으로 일정량씩 증가 또는 감소되는 이득제어신호를 발생하는 이득제어부(301)와, 상기 자동이득증폭기(10)에 입력되는 신호의 크기에 따라 상기 이득제어신호를 가변증폭하여 증폭된 이득제어신호를 상기 자등이독증폭기(l0)의 제어단자에 공급하기 위한 제2이득제어부(302)를 포함함을 특징으로 하는 자동이득조절회로.Gain control of the output signal of the high frequency amplifier 100 for amplifying the high frequency reception signal introduced from the aerial, the frequency converter 200 for transitioning the amplified high frequency reception signal to the intermediate frequency band, and the frequency converter 200 A receiving apparatus of a communication system having an automatic gain controller (300) and a demodulator (400) for demodulating a signal whose gain is adjusted by the automatic gain controller (300); The automatic gain controller 300 increases or decreases by a predetermined amount in time according to the automatic gain amplifier 10 which amplifies the output signal of the frequency converter by a gain adjustment voltage and the output signal of the automatic gain amplifier 10. The gain control unit 301 for generating a reduced gain control signal and the gain control signal amplified by variably amplifying the gain control signal according to the magnitude of the signal input to the automatic gain amplifier 10 may include the self-reading amplifier ( and a second gain controller (302) for supplying to the control terminal of l0). 제1항에 있어서; 제2이득제어부(302)는 상기 주파수변환기(200)에서 인가된 신호에서 직류전압값을 변환하기 위한 AC/DC변환수단(60)과, 상기 AC/DC변환수단(60)의 출력을 자체내의 기준값과 비교하여 k비트의 양자화된 신호를 출력하는 레벨검출수단(70)과, 상기 레벨검출수단(70)의 출력신호의 크기에 따라 상기 이득제어신호를 가변증폭하여 증폭된 이득제어신호를 상기 자동이독증폭기(10)의 제어단자에 공급하는 조정전압발생수단(80)을 포함함을 특징으로 하는 자동이득 조절회로.The method of claim 1; The second gain control unit 302 converts the AC / DC converting means 60 for converting the DC voltage value from the signal applied by the frequency converter 200 and the output of the AC / DC converting means 60 into its own. A level detection means 70 for outputting a k-bit quantized signal compared to a reference value, and a gain amplified by amplifying the gain control signal according to the magnitude of the output signal of the level detection means 70; Automatic gain control circuit, characterized in that it comprises an adjustment voltage generating means (80) for supplying to the control terminal of the automatic read amplifier (10). ※ 참고사항 : 최초출원 내용에 의하여 공개되는 것임.※ Note: This is to be disclosed by the original application.
KR1019910015245A 1991-08-31 1991-08-31 Automatic gain control circuit KR950003712B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019910015245A KR950003712B1 (en) 1991-08-31 1991-08-31 Automatic gain control circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019910015245A KR950003712B1 (en) 1991-08-31 1991-08-31 Automatic gain control circuit

Publications (2)

Publication Number Publication Date
KR930005340A true KR930005340A (en) 1993-03-23
KR950003712B1 KR950003712B1 (en) 1995-04-17

Family

ID=19319449

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019910015245A KR950003712B1 (en) 1991-08-31 1991-08-31 Automatic gain control circuit

Country Status (1)

Country Link
KR (1) KR950003712B1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20040003122A (en) * 2002-06-29 2004-01-13 삼성전자주식회사 A receiver in a telephone-line modem comprising dual automatic gain control circuit and a receiving method comprising dual automatic gain control steps

Also Published As

Publication number Publication date
KR950003712B1 (en) 1995-04-17

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