KR970060719A - 수신기의 포화방지회로 - Google Patents

수신기의 포화방지회로 Download PDF

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Publication number
KR970060719A
KR970060719A KR1019970002276A KR19970002276A KR970060719A KR 970060719 A KR970060719 A KR 970060719A KR 1019970002276 A KR1019970002276 A KR 1019970002276A KR 19970002276 A KR19970002276 A KR 19970002276A KR 970060719 A KR970060719 A KR 970060719A
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KR
South Korea
Prior art keywords
signal
gain
received
gain adjustment
forming
Prior art date
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KR1019970002276A
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English (en)
Inventor
히텡 왕
Original Assignee
사와무라 시코우
오끼뎅끼 고오교오 가부시끼가이샤
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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Application filed by 사와무라 시코우, 오끼뎅끼 고오교오 가부시끼가이샤 filed Critical 사와무라 시코우
Publication of KR970060719A publication Critical patent/KR970060719A/ko

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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
    • H04B1/109—Means associated with receiver for limiting or suppressing noise or interference by improving strong signal performance of the receiver when strong unwanted signals are present at the receiver input
    • 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
    • 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
    • H04B1/1027—Means associated with receiver for limiting or suppressing noise or interference assessing signal quality or detecting noise/interference for the received signal

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Circuits Of Receivers In General (AREA)
  • Control Of Amplification And Gain Control (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Noise Elimination (AREA)

Abstract

종래보다 한층 더 IM 개선을 달성할 수 있는 수신기의 포화방지회로를 제공한다. 수신주파수 대역에서의 수신신호를 설정이득에 따라서 증폭시킴으로써, 다음단계에서의 포화영역에서의 동작을 금지하는 가변이득수단을 가지는 수신기의 포화방지회로에 관계된다. 그리고 희망신호의 수신상도를 나타내는 신호를 얻는 순신강도 형성수단과, 얻어진 수신강도신호에 따라서 가변이득수단에의 이득조정신호를 형성하는 것으로써, 수신강도신호가 소정범위내에 있을 때에는, 연속적 또는 단계적으로 단조변화하는 입출력특성에 따라서, 이득조정신호를 형성하는 이득조정신호 형성수단을 가지는 것을 특징으로 한다.

Description

수신기의 포화방지회로
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음
제1도는 실시형태의 포화방지용 이득조정신호의 형성회로를 나타내는 블록도.

Claims (4)

  1. 수신주파수 대역에서의 수신신호를 설정이득에 따라서 증폭시킴으로써, 다음 단계에서의 포화영역에서의 동작을 금지하는 가변이득수단을 수신기의 포화방지회로에 있어서, 희망신호의 수신강도를 나타내는 신호를 얻는 수신강도 형성수단과, 얻어진 수신강도신호에 따라서 상기 가변이득수단에의 제1의 이득조정신호를 형성하는 것으로써, 상기 수신강도신호가 소정범위내에 있을 때에는, 연속적 또는 단계적으로 단조변화하는 입출력특성에 따라서, 상기 제1의 이득조정신호를 형성하는 제1의 이득조정신호 형성수단을 가지는 것을 특징으로 하는 수신기의 포화방지회로.
  2. 제1항에 있어서, 수신주파수대역보다 낮은 주파수대역으로 다운변화된 수신신호 또는 수신주파수대역의 수신신호에 대하여 자동이득제어동작을 행하는 자동이득제어수단과, 상기 수신강도신호에 따라서 상기 자동이득제어수단에 대한 제2의 이득조정신호를 형성하는 것으로써, 상기 수신강도신호가 상기 소정범위내에 있을 떼에는, 상기 가변이득수단에 의한 동작이 자동이득 제어동작으로서 기능하는 것을 고려한 고정이득, 또는 연속적혹은 단계적으로 단조변화하고 이득을 지시하는, 상기 제2의 이득조정신호를 형성하는 제2의 이득조정신호 형성수단을 가지는 것을 특징으로 하는 수신의 포화방지회로.
  3. 제1항 또는 제2항에 있어서, 상기 제1의 이득조정신호가 지시하는 이득을 변화시키는 상기 수신강도신호의 범위와, 상기 제2의 이득조정신호 형성수단이 상기 제2의 이득조정신호가 지시하는 이득을 변화시키는 상기수신강도신호의 범위가 다른 것을 특징으로 하는 수신기의 포화방지회로.
  4. 제1~3항중 어느 1항에 있어서, 상기 제1 및 제2의 이득조정신호 형성수단이, 상기 수신강도신호에 따라서 출력하는 제1 및 제2의 이득조정신호를 변화시킨 경우라도, 상기 수신강도 형성수단으로부터 출력되는 상기수신강도신호의 레벨이 동일하도록, 상기 제1 및 상기 제2의 이득조정신호 형성수단이 제1 및 제2의 이득조정신호를 형성하는 것을 특징으로 하는 수신기의 포화방지회로.
KR1019970002276A 1996-01-29 1997-01-27 수신기의 포화방지회로 KR970060719A (ko)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP1244796A JP3274055B2 (ja) 1996-01-29 1996-01-29 スペクトル拡散方式に従う受信機の飽和防止回路
JP012447 1996-01-29

Publications (1)

Publication Number Publication Date
KR970060719A true KR970060719A (ko) 1997-08-12

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KR1019970002276A KR970060719A (ko) 1996-01-29 1997-01-27 수신기의 포화방지회로

Country Status (5)

Country Link
US (1) US5862465A (ko)
JP (1) JP3274055B2 (ko)
KR (1) KR970060719A (ko)
CN (1) CN1092874C (ko)
CA (1) CA2194535A1 (ko)

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Publication number Publication date
CA2194535A1 (en) 1997-07-30
US5862465A (en) 1999-01-19
CN1092874C (zh) 2002-10-16
JPH09205332A (ja) 1997-08-05
JP3274055B2 (ja) 2002-04-15
CN1160953A (zh) 1997-10-01

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