KR860002923A - 동기형 영상신호 검파회로 - Google Patents

동기형 영상신호 검파회로 Download PDF

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Publication number
KR860002923A
KR860002923A KR1019850004347A KR850004347A KR860002923A KR 860002923 A KR860002923 A KR 860002923A KR 1019850004347 A KR1019850004347 A KR 1019850004347A KR 850004347 A KR850004347 A KR 850004347A KR 860002923 A KR860002923 A KR 860002923A
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KR
South Korea
Prior art keywords
signal
image
phase
intermediate frequency
carrier component
Prior art date
Application number
KR1019850004347A
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English (en)
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KR890004218B1 (ko
Inventor
데쯔로 이타구라 (외 3)
Original Assignee
사바 쇼오이찌
가부시끼가이샤 도오시바
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 사바 쇼오이찌, 가부시끼가이샤 도오시바 filed Critical 사바 쇼오이찌
Publication of KR860002923A publication Critical patent/KR860002923A/ko
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Publication of KR890004218B1 publication Critical patent/KR890004218B1/ko

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/04—Synchronising
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
    • H04N5/4446—IF amplifier circuits specially adapted for B&W TV
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J7/00—Automatic frequency control; Automatic scanning over a band of frequencies
    • H03J7/02—Automatic frequency control
    • H03J7/04—Automatic frequency control where the frequency control is accomplished by varying the electrical characteristics of a non-mechanically adjustable element or where the nature of the frequency controlling element is not significant
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
    • H04N5/50—Tuning indicators; Automatic tuning control

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Television Receiver Circuits (AREA)
  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)

Abstract

내용 없음

Description

동기형 영상신호 검파회로
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음
제 1 도는 본 발명의 일실시예를 나타내는 회로도.
제 2 도는 제 1 도의 AFT 회로를 구체적으로 나타내는 회로도.
제 3 도는 본 발명이 다른 실시예를 나타내는 회로도.
* 도면의 주요 부분에 대한 부호의 설명
11, 31 : 중간주파증폭기 12, 32 : 영상검파기
13, 34 : 자동주파수 조정회로(AFT 회로) 14, 33 : 리미터
15, 35 : 위상비교기
16, 16', 24, 36 : 저역통과필터
42, 46, 48, 55 : 저역통과필터
17, 37 : 전압제어발진기
18, 21, 38, 44 : 90°위상이동회로 19 : 스위치
20 : 위상동기 잠김상태 판정회로 22 : 대역통과필터
23, 41, 43, 45, 54 : 곱셈회로 39 : 위상보상회로
47 : 미분회로 50 : 가산기
51 : 국부발진기 52 : 안테나
53 : 고주파증폭기

Claims (2)

  1. 영상중간주파신호원과, 영상중간주파신호원에서 뽑아낸 영상중간주파신호의 반송파성분을 추출해내는 리미터, 상기 리미터에 의하여 추출된 반송파성분을 FM검퍼하여 AFT 신호를 생성해내는 자동주파수 조정회로, 전압제어발진기, 상기 영상중간주파신호원에서 출력된 영상중간주파신호를 상기 전압제어 발진기(37)에서 출력된 영상검파용신호를 이용해서 검파하여 영상신호를 복조하는 영상검파회로, 상기 영상검파용신호를 90°위상이동시켜 위상비교용신호를 출력하는 위상이동회로, 위상비교용신호와 상기 영상중간주파신호의 반송파성분을 입력으로 하여 양입력의 위상오차신호를 출력하는 위상비교기, 상기 위상오차신호의 저역성분을 추출하여 상기 전압제어발진기에 인가하는 저역통과필터등으로 구성되는 동기형 영상신호검파회로에 있어서, 상기 전압제어발진기에서 출력된 상기 영상검파용신호와 상기 위상이동회로에서 출력된 상기 위상비교용신호를 상기 리미터에 의하여 추출된 상기 반송파성분의 신호와 함께 상기 자동주파수조정회로로 입력시키므로서 상기 반송파성분의 신호와 상기 영상검파용신호 및 상기 위상비교용신호와의 주파수차를 전압 또는 전류의 형태로 변환시켜 자동주파수조정을 위한 신호로 사용하도록 된 것을 특징으로 하는 동기형 영상신호검파회로.
  2. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
KR1019850004347A 1984-09-29 1985-06-19 동기형 영상신호 검파회로 KR890004218B1 (ko)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP59204846A JPS6182586A (ja) 1984-09-29 1984-09-29 同期検波回路
JP59-204846 1984-09-29

Publications (2)

Publication Number Publication Date
KR860002923A true KR860002923A (ko) 1986-04-30
KR890004218B1 KR890004218B1 (ko) 1989-10-27

Family

ID=16497360

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019850004347A KR890004218B1 (ko) 1984-09-29 1985-06-19 동기형 영상신호 검파회로

Country Status (5)

Country Link
US (1) US4709408A (ko)
EP (1) EP0176703B1 (ko)
JP (1) JPS6182586A (ko)
KR (1) KR890004218B1 (ko)
DE (1) DE3574097D1 (ko)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4823399A (en) * 1987-07-30 1989-04-18 General Instrument Corporation Refined tuning of RF receiver with frequency-locked loop
US4766391A (en) * 1987-08-03 1988-08-23 Motorola, Inc. Video demodulator system
DE4009729A1 (de) * 1990-03-27 1991-10-02 Thomson Brandt Gmbh Konverter fuer ein digitales empfangssystem
DE4332161A1 (de) * 1993-09-22 1995-03-23 Thomson Brandt Gmbh Hochfrequenzempfänger
US5596606A (en) * 1994-04-05 1997-01-21 Scientific-Atlanta, Inc. Synchronous detector and methods for synchronous detection
US5650749A (en) * 1996-06-10 1997-07-22 Motorola, Inc. FM demodulator using injection locked oscillator having tuning feedback and linearizing feedback
US6834086B2 (en) * 2000-12-21 2004-12-21 Freescale Semiconductor, Inc. Demodulator and method for second harmonic cancellation

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4091410A (en) * 1976-11-08 1978-05-23 Zenith Radio Corporation Frequency and phase lock loop synchronous detecting system having a pair of phase lock conditions
JPS6013567B2 (ja) * 1978-03-30 1985-04-08 ソニー株式会社 テレビジヨン受像機
JPS54150027A (en) * 1978-05-18 1979-11-24 Sony Corp Television picture receiver
JPS5564477A (en) * 1978-11-10 1980-05-15 Sony Corp Television receiver
DE3272758D1 (en) * 1981-11-09 1986-09-25 Matsushita Electric Ind Co Ltd A synchronous video detector circuit using phase-locked loop
US4470145A (en) * 1982-07-26 1984-09-04 Hughes Aircraft Company Single sideband quadricorrelator
JPH11246A (ja) * 1997-06-09 1999-01-06 Efuiile:Kk 宝飾物品のための陳列方法及び陳列構造
JPH11247A (ja) * 1997-06-09 1999-01-06 Koremori Kawai メッセージ付き写真ケース

Also Published As

Publication number Publication date
EP0176703A1 (en) 1986-04-09
JPH0221194B2 (ko) 1990-05-14
KR890004218B1 (ko) 1989-10-27
EP0176703B1 (en) 1989-11-02
DE3574097D1 (en) 1989-12-07
JPS6182586A (ja) 1986-04-26
US4709408A (en) 1987-11-24

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