KR950022150A - Automatic Gain Control with Variable Attenuator - Google Patents

Automatic Gain Control with Variable Attenuator Download PDF

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Publication number
KR950022150A
KR950022150A KR1019930029736A KR930029736A KR950022150A KR 950022150 A KR950022150 A KR 950022150A KR 1019930029736 A KR1019930029736 A KR 1019930029736A KR 930029736 A KR930029736 A KR 930029736A KR 950022150 A KR950022150 A KR 950022150A
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KR
South Korea
Prior art keywords
signal
variable attenuator
input
automatic gain
outputting
Prior art date
Application number
KR1019930029736A
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Korean (ko)
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KR960006941B1 (en
Inventor
김남구
Original Assignee
김주용
현대전자산업 주식회사
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Application filed by 김주용, 현대전자산업 주식회사 filed Critical 김주용
Priority to KR1019930029736A priority Critical patent/KR960006941B1/en
Publication of KR950022150A publication Critical patent/KR950022150A/en
Application granted granted Critical
Publication of KR960006941B1 publication Critical patent/KR960006941B1/en

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Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION, OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
    • H03L5/00—Automatic control of voltage, current, or power

Abstract

본 발명은 1.5〔GHZ〕대역의 고주파 신호에 대한 자동 이득 조절 장치에 있어서, 외부에서 신호 레벨이 조정가능한 기준 저주파 신호를 이용하여 그값에 대응하는 출력 신호 레벨을 자동으로 조절할 수 있도록 한 가변 감쇠기를 이용한 자동 이득 조절 장치에 관한 것으로, 종래의 자동 이득 조절 장치는 자동 이득 조절 장치의 출력신호 제벨을 외부에서 원하는 값으로 조정하기 어려운 문제점이 있고, 또한 가변 증폭기를 사용 함으로써 시스템의 구현이 복잡해지며, 이로인해 경제성 및 신뢰성이 저하되는 문제점이 있었다.The present invention provides an automatic gain adjusting device for a high frequency signal of 1.5 [GH Z ] band, wherein the variable attenuator is configured to automatically adjust the output signal level corresponding to the value by using a reference low frequency signal whose signal level is externally adjustable. The present invention relates to an automatic gain adjusting device using a conventional automatic gain adjusting device, which is difficult to adjust the output signal level of the automatic gain adjusting device to a desired value from the outside, and the implementation of the system is complicated by using a variable amplifier. As a result, there was a problem in that economic efficiency and reliability are deteriorated.

본 발명은 이와같은 종래의 문제점을 감안하여, 외부에서 신호 레벨이 조절 가능한 기준 저주파 신호를 이용하여 그 가변적인 기준 신호에 대응하는 출력 신호 레벨을 가변 증폭기 대신 가변 감쇠기를 사용하여 이득을 자동적으로 조절할 수 있도록 한 것이다.In view of such a conventional problem, the present invention uses a reference low frequency signal whose signal level is adjustable from the outside to automatically adjust the gain using a variable attenuator instead of a variable amplifier to adjust the output signal level corresponding to the variable reference signal. I would have to.

Description

가변 감쇠기를 이용한 자동 이득 조절 장치Automatic Gain Control with Variable Attenuator

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

제2도는 본 발명 가변 감쇠기를 이용한 자동 이득 조절 장치의 구성도.2 is a block diagram of an automatic gain control device using the variable attenuator of the present invention.

제4도는 제2도의 차동 적분 회로부에 대한 상세 회로도이다.4 is a detailed circuit diagram of the differential integrating circuit portion of FIG.

Claims (1)

입력된 고주파 신호를 제어 신호에 의해 감쇠시켜 출력하는 가변 감쇠기(10)와; 이 가변 감쇠기(10)에서 감쇠되어 출력된 입력 신호를 증폭시켜 출력하는 증폭 회로부(20)와; 이 증폭 회로부(20)에서 증폭되어 출력된 신호를 제어 신호에 의해 감쇠시켜 출력하는 가변 감소기(30)와; 이 가변 감쇠기(30)에서 감쇠되어 출력된 신호를 증폭시켜 출력하는 증폭회로부(40)와; 이 증폭 회로부(40)에서 증폭되어 출력된 신호를 양방향으로 분배 시키는 분배 회로부(50)와; 이 분배 회로부(50)에서 분배된 신호 중 입력되는 고주파 신호의 레벨을 탐지하여 직류 값으로 변환하는 고주파 신호 검출부(60)와; 입력되는 기준 저주파 신호의 레벨을 탐지하여 직류 값으로 변환하는 기준 신호 검출부(70)와; 상기 고주파 신호 검출부(60)에서 변환되어 입력된 직류 값 및 상기 기준 신호 검출부(70)에서 변환되어 입력된 기준 신호를 비교한 후,그 차에 해당하는 값을 계속 적분하여 상기 가변 감쇠기(10,30)를 조정하는 제어 신호를 출력하는 차동 적분 회로부(80)와; 상기 차동 적분 회로부(80)에서 적분되어 출력된 제어 신호를 일정한 레벨로 고정시켜 상기 가변 감쇠기(10,30)의 오동작을 방지하기 위한 클램핑 회로부(90)를 포함하여 구성함을 특징으로 하는 가변 감쇠기를 이용한 자동 이득 조절 장치.A variable attenuator 10 for attenuating and outputting the input high frequency signal by a control signal; An amplifying circuit unit 20 for amplifying and outputting an input signal attenuated by the variable attenuator 10; A variable reducer 30 for attenuating and outputting the signal amplified and output by the amplifying circuit unit 20 by a control signal; An amplifying circuit section 40 for amplifying and outputting a signal attenuated by the variable attenuator 30; A distribution circuit section 50 for distributing the signal amplified and output by the amplifying circuit section in both directions; A high frequency signal detection unit 60 for detecting a level of a high frequency signal input among the signals distributed by the distribution circuit unit 50 and converting the signal into a DC value; A reference signal detector 70 for detecting a level of an input reference low frequency signal and converting the level into a DC value; After comparing the DC value converted and input by the high frequency signal detector 60 and the reference signal converted and input by the reference signal detector 70, the value corresponding to the difference is continuously integrated and the variable attenuator 10, A differential integrating circuit portion 80 for outputting a control signal for adjusting 30; Variable attenuator, characterized in that it comprises a clamping circuit 90 for preventing the malfunction of the variable attenuator (10,30) by fixing the control signal integrated and output from the differential integrating circuit unit 80 at a constant level Automatic gain control device using. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019930029736A 1993-12-27 1993-12-27 Automatic gain control circuit using a variable attenuator KR960006941B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019930029736A KR960006941B1 (en) 1993-12-27 1993-12-27 Automatic gain control circuit using a variable attenuator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019930029736A KR960006941B1 (en) 1993-12-27 1993-12-27 Automatic gain control circuit using a variable attenuator

Publications (2)

Publication Number Publication Date
KR950022150A true KR950022150A (en) 1995-07-28
KR960006941B1 KR960006941B1 (en) 1996-05-25

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Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019930029736A KR960006941B1 (en) 1993-12-27 1993-12-27 Automatic gain control circuit using a variable attenuator

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KR (1) KR960006941B1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20010066460A (en) * 1999-12-31 2001-07-11 윤종용 Apparatus for controlling inter modulation distortion in cdma rf terminal equipment
KR100921351B1 (en) * 2007-05-25 2009-10-15 광운대학교 산학협력단 Control Device of Amplitude Level for Radio Frequency Signal

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