KR830007005A - 선국장치 - Google Patents

선국장치 Download PDF

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Publication number
KR830007005A
KR830007005A KR1019810002861A KR810002861A KR830007005A KR 830007005 A KR830007005 A KR 830007005A KR 1019810002861 A KR1019810002861 A KR 1019810002861A KR 810002861 A KR810002861 A KR 810002861A KR 830007005 A KR830007005 A KR 830007005A
Authority
KR
South Korea
Prior art keywords
frequency
broadcast
local oscillation
reception channel
discrimination
Prior art date
Application number
KR1019810002861A
Other languages
English (en)
Other versions
KR870001403B1 (ko
Inventor
카즈히로 카메모또
Original Assignee
사바쇼오이찌
도오쿄오 시바우라 덴기 가부시기가이샤
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 사바쇼오이찌, 도오쿄오 시바우라 덴기 가부시기가이샤 filed Critical 사바쇼오이찌
Publication of KR830007005A publication Critical patent/KR830007005A/ko
Application granted granted Critical
Publication of KR870001403B1 publication Critical patent/KR870001403B1/ko

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Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J7/00—Automatic frequency control; Automatic scanning over a band of frequencies
    • H03J7/18—Automatic scanning over a band of frequencies
    • H03J7/20—Automatic scanning over a band of frequencies where the scanning is accomplished by varying the electrical characteristics of a non-mechanically adjustable element
    • H03J7/28—Automatic scanning over a band of frequencies where the scanning is accomplished by varying the electrical characteristics of a non-mechanically adjustable element using counters or frequency dividers
    • H03J7/285—Automatic scanning over a band of frequencies where the scanning is accomplished by varying the electrical characteristics of a non-mechanically adjustable element using counters or frequency dividers the counter or frequency divider being used in a phase locked loop

Abstract

내용 없음

Description

선국장치
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음
제1도는 PLL를 사용한 디지탈 주파수 신시사이저 방식의 텔레비젼 수상기의 선국장치의 1실시예를 도시한 블록도.
제2도는 제1도의 장치의 일부에 마이크로컴퓨터를 사용하는 경우의 마이크로컴퓨터의 1예를 도시하는 블록도.
제3도는 제2도의 마이크로컴퓨터의 선국장치의 일부분의 종래예를 나타내는 순서도.
제5도는 본 발명에 관한 선국장치를 제1도 및 제2도에 표시하는 바와 같은 구성으로 실시한 경우의 본 발명의 특징으로 하는 부분의 기능을 표시하는 순서도.
제6(a)도, 제6(b)도는 제5도의 실시예에 있어서의 효과를 설명하기 위한 영상 중간 주파증폭회로의 대역통과 특성을 도시하는 특성도이다.

Claims (1)

  1. 페즈 록 루우프(phased lock loop)를 사용한 주파수 신시사이저 방식의 선국장치에 있어서, 수신 채널에 방송의 유무를 자동적으로 판별하는 방송유무판별수단과, 이 방송유무판별 수단의 판별 동작시에는 튜우너의 국부발진 주파수를 상기 수신 채널의 표준 주파수보다 낮게 설정하여 판별 동작에 의하여 방송이 있다는 판별결과가 얻어지면 상기 국부발진 주파수를 상기 표준 주파수로 설정하는 국부발진 주파수 절환수단을 최소한 구비하는 것을 특징으로 하는 선국장치.
    ※참고사항:최초출원 내용에 의하여 공개하는 것임.
KR1019810002861A 1980-08-05 1981-08-05 선국장치 KR870001403B1 (ko)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP107,284 1980-08-05
JP107284 1980-08-05
JP10728480A JPS5732123A (en) 1980-08-05 1980-08-05 Channel selector

Publications (2)

Publication Number Publication Date
KR830007005A true KR830007005A (ko) 1983-10-12
KR870001403B1 KR870001403B1 (ko) 1987-07-25

Family

ID=14455175

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019810002861A KR870001403B1 (ko) 1980-08-05 1981-08-05 선국장치

Country Status (8)

Country Link
US (1) US4451850A (ko)
JP (1) JPS5732123A (ko)
KR (1) KR870001403B1 (ko)
AT (1) AT394287B (ko)
DE (1) DE3130865C2 (ko)
FR (1) FR2488472B1 (ko)
GB (1) GB2081996B (ko)
NL (1) NL188318C (ko)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4542533A (en) * 1984-04-27 1985-09-17 General Electric Company Tuning system with automatic frequency control
US4653074A (en) * 1985-01-24 1987-03-24 Sperry Corporation Bit sync generator
JPS635669A (ja) * 1986-06-25 1988-01-11 Mitsubishi Electric Corp 選局装置
KR920009681B1 (ko) * 1989-05-26 1992-10-22 삼성전자 주식회사 자동 프로그램시 채널의 스캐닝 시간 단축 방법
US4901036A (en) * 1989-06-29 1990-02-13 Motorola, Inc. Frequency synthesizer with an interface controller and buffer memory
JPH03159308A (ja) * 1989-11-16 1991-07-09 Mitsubishi Electric Corp チャンネルスキャン装置
JPH03198244A (ja) * 1989-12-26 1991-08-29 Mitsubishi Electric Corp チャンネルスキャン装置
KR920009877B1 (ko) * 1990-04-28 1992-11-02 삼성전자 주식회사 고속 자동 주파수 동조방법
GB2280321B (en) * 1993-06-30 1998-06-10 Funai Electric Co Channel Selection Apparatus
JPH0897684A (ja) * 1994-09-28 1996-04-12 Uniden Corp 無線受信機の選局方法およびそれを用いた無線受信機
JP3319491B2 (ja) * 1995-01-19 2002-09-03 船井電機株式会社 放送波チャンネル同調方法
US6297858B1 (en) * 1997-09-23 2001-10-02 Ati Technologies, Inc. Method and apparatus for detecting video transmissions
GB2336731A (en) * 1998-04-22 1999-10-27 Thomson Multimedia Sa A video tuner in which data representing a PLL division is used to control other circuit parameters
KR20000051456A (ko) * 1999-01-22 2000-08-16 윤종용 채널번호 자동 메모리장치

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2613514C3 (de) * 1976-03-30 1979-12-20 Philips Patentverwaltung Gmbh, 2000 Hamburg Schaltungsanordnung für Fernsehoder Rundfunkempfänger für einen automatischen Sendersuchlauf
US4121162A (en) * 1976-06-14 1978-10-17 Motorola, Inc. Digital phase locked loop tuning system
US4041535A (en) * 1976-07-22 1977-08-09 Matsushita Electric Corporation Of America Frequency synthesizer tuning system with signal seek control
US4084127A (en) * 1976-07-29 1978-04-11 Rca Corporation Digital frequency deviation detector useful in a television tuning system
JPS5410621A (en) * 1977-06-27 1979-01-26 Hitachi Ltd Detection circuit for normal tuning frequency
US4271434A (en) * 1978-05-17 1981-06-02 Matsushita Electric Industrial Co., Ltd. Channel selector
US4214274A (en) * 1978-06-19 1980-07-22 Matsushita Electric Corporation Frequency synthesizer tuning system with variable dwell signal seek
JPS593891B2 (ja) * 1979-01-17 1984-01-26 ソニー株式会社 受信検出回路

Also Published As

Publication number Publication date
AT394287B (de) 1992-02-25
NL188318B (nl) 1991-12-16
FR2488472A1 (fr) 1982-02-12
ATA345381A (de) 1991-08-15
NL188318C (nl) 1992-05-18
GB2081996A (en) 1982-02-24
FR2488472B1 (fr) 1986-09-26
DE3130865C2 (de) 1985-03-14
KR870001403B1 (ko) 1987-07-25
US4451850A (en) 1984-05-29
GB2081996B (en) 1984-05-23
DE3130865A1 (de) 1982-04-15
JPS5732123A (en) 1982-02-20
NL8103643A (nl) 1982-03-01

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