KR880003487A - Trunk Line Sensitivity Automatic Gain Compensation Circuit for Private Exchange - Google Patents

Trunk Line Sensitivity Automatic Gain Compensation Circuit for Private Exchange Download PDF

Info

Publication number
KR880003487A
KR880003487A KR1019860006991A KR860006991A KR880003487A KR 880003487 A KR880003487 A KR 880003487A KR 1019860006991 A KR1019860006991 A KR 1019860006991A KR 860006991 A KR860006991 A KR 860006991A KR 880003487 A KR880003487 A KR 880003487A
Authority
KR
South Korea
Prior art keywords
circuit
output
automatic gain
impedance
private exchange
Prior art date
Application number
KR1019860006991A
Other languages
Korean (ko)
Other versions
KR890003759B1 (en
Inventor
조원상
Original Assignee
강진구
삼성반도체통신 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 강진구, 삼성반도체통신 주식회사 filed Critical 강진구
Priority to KR1019860006991A priority Critical patent/KR890003759B1/en
Publication of KR880003487A publication Critical patent/KR880003487A/en
Application granted granted Critical
Publication of KR890003759B1 publication Critical patent/KR890003759B1/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06—Receivers
    • H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
    • H04B1/12—Neutralising, balancing, or compensation arrangements
    • 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
    • H03G3/3036—Automatic control in amplifiers having semiconductor devices in high-frequency amplifiers or in frequency-changers
    • 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
    • H03G3/3052—Automatic control in amplifiers having semiconductor devices in bandpass amplifiers (H.F. or I.F.) or in frequency-changers used in a (super)heterodyne receiver
    • H03G3/3068—Circuits generating control signals for both R.F. and I.F. stages
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G2201/00—Indexing scheme relating to subclass H03G
    • H03G2201/10—Gain control characterised by the type of controlled element
    • H03G2201/106—Gain control characterised by the type of controlled element being attenuating element

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Interface Circuits In Exchanges (AREA)

Abstract

내용 없음No content

Description

사설교환기용 국선감도 자동 이득 보상회로CO line automatic gain compensation circuit for private exchange

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

제1도는 본 발명에 따른 회로를 사설교환기에 적용한 시스템도.1 is a system diagram applying a circuit according to the present invention to a private exchange.

Claims (1)

사설교환기의 자동 이득 보상회로에 있어서, 입력신호를 증폭하는 증폭회로(300)와, 상기 증폭회로(300)와 접속되고 이회로의 출력신호를 직류전압레벨로 변환하는 정류회로(240)와, 상기 정류회로(240)의 출력과 자동 이득제어 조절신호를 각각 입력 비교하여 소정의 직류전압레벨을 출력하는 제1 및 제2차동증폭기(400)(500)와, 상기 차동증폭기(400)(500)의 출력단과 각각 접속되고 상기 각 차동증폭기(400)(500)의 출력에 따라 출력 임피던스가 가변되고 출력단이 상기 증폭회로의 입력단과 접속되는 제1 및 제2임피던스 조절회로(600)(700)를 구비하여 큰신호 입력시 제2임피던스 조절회로(700)의 임피던스를 감소시켜 증폭회로(300)의 이득을 낮추고 작은신호 입력시 상기 임피던스를 증가시켜 상기 이득을 증가시킴과 동시에 제1임피던스 조절회로의 임피던스를 조절하여 잡음을 감쇄시킴을 특징으로 하는 회로.An automatic gain compensation circuit of a private exchange, comprising: an amplifying circuit (300) for amplifying an input signal, a rectifying circuit (240) connected to the amplifying circuit (300) and converting an output signal of the circuit to a DC voltage level; First and second differential amplifiers 400 and 500 for outputting a predetermined DC voltage level by comparing the output of the rectifier circuit 240 and the automatic gain control adjustment signal, respectively, and the differential amplifiers 400 and 500 First and second impedance control circuits 600 and 700 connected respectively to the output stages of the amplifier and the output impedances are varied according to the outputs of the respective differential amplifiers 400 and 500 and the output terminals are connected to the input terminals of the amplifier circuit. It is provided to reduce the impedance of the second impedance control circuit 700 when a large signal input lowers the gain of the amplification circuit 300, and when the small signal input increases the gain and at the same time the first impedance control circuit To adjust the impedance of The circuit characterized by Sikkim attenuate the noise. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019860006991A 1986-08-23 1986-08-23 Loop voltage sensitivity automatic complementing circuit KR890003759B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019860006991A KR890003759B1 (en) 1986-08-23 1986-08-23 Loop voltage sensitivity automatic complementing circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019860006991A KR890003759B1 (en) 1986-08-23 1986-08-23 Loop voltage sensitivity automatic complementing circuit

Publications (2)

Publication Number Publication Date
KR880003487A true KR880003487A (en) 1988-05-17
KR890003759B1 KR890003759B1 (en) 1989-10-04

Family

ID=19251875

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019860006991A KR890003759B1 (en) 1986-08-23 1986-08-23 Loop voltage sensitivity automatic complementing circuit

Country Status (1)

Country Link
KR (1) KR890003759B1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100442355B1 (en) * 2000-09-19 2004-07-30 엘지전자 주식회사 Automatic controlling apparatus for reception gain

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100442355B1 (en) * 2000-09-19 2004-07-30 엘지전자 주식회사 Automatic controlling apparatus for reception gain

Also Published As

Publication number Publication date
KR890003759B1 (en) 1989-10-04

Similar Documents

Publication Publication Date Title
DE69934566D1 (en) Active compensation of a capacitive multiplier
KR900008763A (en) Amplifier circuit using feedback load
KR870009543A (en) Differential amplifier circuit
KR910017736A (en) Variable gain amplifier
KR920009060A (en) Compensation Circuit and Method for Stabilizing Operational Amplifiers
KR830005761A (en) Variable Load Impedance Gain Control Amplifier
KR860002102A (en) Sample and Hold Circuit
KR870002694A (en) Amplification circuit
KR830006989A (en) Output amplifier circuit
DE3875681D1 (en) CIRCUIT ARRANGEMENT FOR THE SUPPRESSION OF INTERFERENCE NOISE.
KR830009689A (en) Signal level control circuit
KR880003487A (en) Trunk Line Sensitivity Automatic Gain Compensation Circuit for Private Exchange
KR880005741A (en) amplifier
CA2067581A1 (en) Equivalent inductance circuit
KR910003918A (en) Amplifier
KR840001014A (en) Amplification furnace
KR880010425A (en) Sample hold circuit
SE9101459D0 (en) LIMITING AMPLIFIER
KR900702698A (en) Telephone circuit
KR930003582A (en) receiving set
KR920013892A (en) Signal amplification circuit
SU1681379A1 (en) Shf amplfier
KR920018744A (en) Signal level control circuit
KR880004159Y1 (en) Double signal amplifier using bridge amplifer
KR890003116A (en) Variable phase compensation device.

Legal Events

Date Code Title Description
A201 Request for examination
N231 Notification of change of applicant
G160 Decision to publish patent application
E701 Decision to grant or registration of patent right
GRNT Written decision to grant
FPAY Annual fee payment

Payment date: 20050921

Year of fee payment: 17

EXPY Expiration of term