KR960009390A - Automatic Gain Control Circuit Using Photocoupler - Google Patents

Automatic Gain Control Circuit Using Photocoupler Download PDF

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Publication number
KR960009390A
KR960009390A KR1019940021368A KR19940021368A KR960009390A KR 960009390 A KR960009390 A KR 960009390A KR 1019940021368 A KR1019940021368 A KR 1019940021368A KR 19940021368 A KR19940021368 A KR 19940021368A KR 960009390 A KR960009390 A KR 960009390A
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KR
South Korea
Prior art keywords
circuit
signal
amplifying
photocoupler
gain control
Prior art date
Application number
KR1019940021368A
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Korean (ko)
Inventor
장기욱
Original Assignee
정장호
금성정보통신 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.)
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Publication date
Application filed by 정장호, 금성정보통신 주식회사 filed Critical 정장호
Priority to KR1019940021368A priority Critical patent/KR960009390A/en
Publication of KR960009390A publication Critical patent/KR960009390A/en

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Abstract

본 발명은 포토커플러를 이용한 자동이득 제어회로(AGC)에 관한 것으로, 특히 아날로그 주파수 전송선로의 손실을 고속으로 보상해 줄 수 있는 포토커플러를 이용한 자동이득조절회로에 관한 것이다.The present invention relates to an automatic gain control circuit (AGC) using a photocoupler, and more particularly, to an automatic gain control circuit using a photocoupler capable of compensating for the loss of an analog frequency transmission line at high speed.

본 발명의 포토커플러를 이용한 자동이득 제어회로는 전송로로부터 입력신호를 받아들이기 위한 변환 트랜스포머(210)와, 상기 변환 트랜스포머(210)를 통해 입력된 입력신호를 일정향 만큼 증폭시켜 출력하기 위한 메인 증폭회로(220)와, 상기 메인 증폭회로(220)의 저항 하이브리드를 통해 분기된 증폭출력으로부터 파일럿 주파수 성분을 검출하여 출력하는 파일럿 주파수 검출필터(230)와, 상기 파일럿 주파수 성분신호를 증폭하기 위한 증폭회로(240)와, 상기 증폭된 신호로부터 이에 비례한 직류 신호를 검출하는 직류검출회로(250)와, 상기 직류 검출회로(250)의 직류신호가 인가되는 히터(24A)와 상기 히터(25A)의 발명에 반비례하는 저항특성을 갖고 상기 메인증폭회로(220)의 부궤환 회로에 삽입되는 비이드(28B)를 구비한 포토커플러(260)로 구성된다.The automatic gain control circuit using the photocoupler of the present invention is a main transformer for amplifying and outputting a conversion transformer 210 for receiving an input signal from a transmission path and an input signal input through the conversion transformer 210 by a predetermined direction. An amplification circuit 220, a pilot frequency detection filter 230 for detecting and outputting a pilot frequency component from the amplified output branched through the resistance hybrid of the main amplifying circuit 220, and for amplifying the pilot frequency component signal. An amplification circuit 240, a DC detection circuit 250 for detecting a DC signal proportional to the amplified signal, a heater 24A to which a DC signal of the DC detection circuit 250 is applied, and the heater 25A. And a photocoupler 260 having a resistance characteristic inversely proportional to the invention and having a bead 28B inserted into the negative feedback circuit of the main amplifier circuit 220.

Description

포토커플러를 이용한 자동이득 제어회로Automatic Gain Control Circuit Using Photocoupler

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

제3도는 본 발명에 따른 포토커플러를 이용한 자동이득 제어회로의 블럭도.3 is a block diagram of an automatic gain control circuit using a photocoupler according to the present invention.

제4도는 제3도의 DC검출회로에 대한 상세회로도이다.4 is a detailed circuit diagram of the DC detection circuit of FIG.

Claims (2)

전송로로부터 입력신호를 받아들이기 위한 변환 트랜스포머(210)와, 상기 변환 트랜스포머(210)를 통해 입력된 입력신호를 일정향 만큼 증폭시켜 출력하기 위한 메인 증폭회로(220)와, 상기 메인 증폭회로(220)의 저항 하이브리드를 통해 분기된 증폭출력으로부터 파일럿 주파수 성분을 검출하여 출력하는 파일럿 주파수 검출필터(230)와, 상기 파일럿 주파수 성분신호를 증폭하기 위한 증폭회로(240)와, 상기 증폭된 신호로부터 이에 비례한 직류 신호를 검출하는 직류검출회로(250)와, 상기 직류 검출회로(250)의 직류신호가 인가되는 히터(24A)와 상기 히터(25A)의 발명에 반비례하는 저항특성을 갖고 상기 메인증폭회로(220)의 부궤환 회로에 삽입되는 비이드(28B)를 구비한 포토커플러(260)로 구성되는 것을 특징으로 하는 포토커플러를 이용한 자동이득 제어회로.A conversion transformer 210 for receiving an input signal from a transmission path, a main amplifying circuit 220 for amplifying and outputting an input signal input through the conversion transformer 210 by a predetermined direction, and the main amplifying circuit ( A pilot frequency detection filter 230 for detecting and outputting a pilot frequency component from the amplified output branched through the resistance hybrid of 220, an amplifying circuit 240 for amplifying the pilot frequency component signal, and the amplified signal. The main circuit has a resistance characteristic inversely proportional to the invention of the heater 24A and the heater 25A to which the DC signal of the DC detection circuit 250 is applied, and the DC signal of the DC detection circuit 250 is applied. An automatic gain control circuit using a photocoupler, comprising a photocoupler 260 having a bead 28B inserted into a negative feedback circuit of the amplification circuit 220. 제1항에 있어서, 상기 직류검출회로(250)는 증폭회로(240)의 출력신호를 2단 증폭하기 위한 제1및 제2증폭기(251,253)와, 상기 제2증폭기(253)출력을 기준전압과 비교하기 위한 비교기(255)와, 상기 비교기(255)의 출력에 비례하는 직류전류를 발생하기 위한 직류변환수단(257)으로 구성되는 것을 특징으로 하는 포토커플러를 이용한 자동이득 제어회로.2. The DC circuit of claim 1, wherein the DC detection circuit 250 includes first and second amplifiers 251 and 253 for amplifying two stages of the output signal of the amplifier circuit 240, and the output of the second amplifier 253. And a direct current comparator (255) for generating a DC current proportional to the output of the comparator (255) and a comparator (255) for comparison. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019940021368A 1994-08-29 1994-08-29 Automatic Gain Control Circuit Using Photocoupler KR960009390A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019940021368A KR960009390A (en) 1994-08-29 1994-08-29 Automatic Gain Control Circuit Using Photocoupler

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019940021368A KR960009390A (en) 1994-08-29 1994-08-29 Automatic Gain Control Circuit Using Photocoupler

Publications (1)

Publication Number Publication Date
KR960009390A true KR960009390A (en) 1996-03-22

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ID=66686904

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019940021368A KR960009390A (en) 1994-08-29 1994-08-29 Automatic Gain Control Circuit Using Photocoupler

Country Status (1)

Country Link
KR (1) KR960009390A (en)

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