KR880008524A - 선국장치 - Google Patents

선국장치 Download PDF

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Publication number
KR880008524A
KR880008524A KR1019870014842A KR870014842A KR880008524A KR 880008524 A KR880008524 A KR 880008524A KR 1019870014842 A KR1019870014842 A KR 1019870014842A KR 870014842 A KR870014842 A KR 870014842A KR 880008524 A KR880008524 A KR 880008524A
Authority
KR
South Korea
Prior art keywords
afc
local oscillator
circuit
state
voltage
Prior art date
Application number
KR1019870014842A
Other languages
English (en)
Other versions
KR910001375B1 (ko
Inventor
카즈히꼬 쿠보
아끼라 우스이
미노루 미야다
히데유끼 이꾸하라
히로유끼 나가이
타다시 야마다
Original Assignee
다니이 아끼오
마쯔시다덴기산교 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 다니이 아끼오, 마쯔시다덴기산교 가부시기가이샤 filed Critical 다니이 아끼오
Publication of KR880008524A publication Critical patent/KR880008524A/ko
Application granted granted Critical
Publication of KR910001375B1 publication Critical patent/KR910001375B1/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
    • H03J7/02—Automatic frequency control
    • 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
    • H03J7/06—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 using counters or frequency dividers
    • H03J7/065—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 using counters or frequency dividers the counter or frequency divider being used in a phase locked loop

Landscapes

  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)
  • Television Receiver Circuits (AREA)
  • Superheterodyne Receivers (AREA)

Abstract

내용 없음.

Description

선국장치
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음
제3도는 본 발명의 일실시예에서의 선국장치의 블록도.
제4도는 제3도에서의 PLL회로의 구체 블록도
제5도는 제3도에서의 마이크로 컴퓨터의 기능 블록도.

Claims (4)

  1. 발진주파수가 가변의 제1의 국부발진기와 발진주파수가 일정한 제2의 국부발진기를 가진 튜우너부와, 이 튜우너부로부터 출력되는 영상중간주파신호의 레벨에 따른 AFC전압을 출력하는 자동주파수 제어회로와, 상기 제1의 국부발진기의 발진주파수를 제어하는 PLL회로와, AFC스위치와, 상기 AFC스위치가 제1의 상태에 있어서, 상기 제2의 국부발진기에 상기 AFC회로도부터 출력되는 AFC전압을 공급하고, 상기 AFC스위치가 제2의 상태에 있어서 제2의 국부발진기에는 고정전압을 공급하고, 상기 제1의 국부발진기 및 PLL회로에 대하여 상기 AFC회로의 AFC전압을 공급하도록 절환제어하는 수단을 구비한 선국장치.
  2. 제1항에 있어서, 제1의 국부발진기에 대한 AFC회로의 AFC동작이 완료된 시점에서, AFC회로로부터 출력되는 AFC전압이 다시 제2의 국부발진기에 공급되도록 자동적으로 절환제어를 행하는 수단을 포함한 선국장치.
  3. 제1항에 있어서, AFC스위치는, 채널절환시에 제2의 상태로 되고, 그 이외의 기간은 제1의 상태를 있도록 구성된 선국장치.
  4. 제1항에 있어서, AFC회로의 AFC전압을 PLL회로를 포함한 제1의 국부발진기에 공급하는 상태에 있어서, AFC특성의 감도를 내리는 분할저항을 AFC회로의 AFC전압출력단에 접속하도록한 선국장치.
    ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
KR1019870014842A 1986-12-24 1987-12-23 선국장치 KR910001375B1 (ko)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP313954 1986-12-24
JP61313954A JPS63161718A (ja) 1986-12-24 1986-12-24 選局装置
JP61-3139954 1986-12-24

Publications (2)

Publication Number Publication Date
KR880008524A true KR880008524A (ko) 1988-08-31
KR910001375B1 KR910001375B1 (ko) 1991-03-04

Family

ID=18047491

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019870014842A KR910001375B1 (ko) 1986-12-24 1987-12-23 선국장치

Country Status (5)

Country Link
US (1) US4817195A (ko)
EP (1) EP0273389B1 (ko)
JP (1) JPS63161718A (ko)
KR (1) KR910001375B1 (ko)
DE (1) DE3781655T2 (ko)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100401242B1 (ko) * 1996-07-26 2003-12-24 엘지이노텍 주식회사 위성방송수신용 튜너

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NL8801874A (nl) * 1988-07-26 1990-02-16 Philips Nv Televisie-ontvanger met een afstemschakeling die een frequentiesyntheseschakeling bevat.
FI85636C (fi) * 1988-08-19 1992-05-11 Nokia Mobira Oy Foerfarande och koppling foer automatisk, pao en raeknare baserad reglering av frekvensen i en radiotelefon.
US5245437A (en) * 1988-12-29 1993-09-14 Samsung Electronics Co., Ltd. Method for selecting channels in a video system using a national television system committee (NTSC) system
DE58909454D1 (de) * 1989-07-06 1995-11-02 Itt Ind Gmbh Deutsche Digitale Steuerschaltung für Abstimmsysteme.
JPH0648778B2 (ja) * 1989-09-29 1994-06-22 三洋電機株式会社 衛星放送受信装置のａｆｃ方法
JPH04111540A (ja) * 1990-08-30 1992-04-13 Matsushita Electric Ind Co Ltd ダブルスーパチューナ
JPH05152903A (ja) * 1991-06-29 1993-06-18 Nec Corp 移動無線機
US5311318A (en) * 1992-08-17 1994-05-10 Zenith Electronics Corporation Double conversion digital tuning system using separate digital numbers for controlling the local oscillators
JPH0746150A (ja) * 1993-07-31 1995-02-14 Nec Corp 無線選択呼出受信機
DE4332161A1 (de) * 1993-09-22 1995-03-23 Thomson Brandt Gmbh Hochfrequenzempfänger
US5663989A (en) * 1993-10-28 1997-09-02 Plessey Semiconductors Limited Control arrangements for digital radio receivers
US5552838A (en) * 1993-12-24 1996-09-03 Kabushiki Kaisha Toshiba Apparatus for tuning offset signals by controlling a tuner based on a difference in frequency of signals tuned by that tuner
US5486866A (en) * 1994-06-21 1996-01-23 Thomson Consumer Electronics, Inc. Oscillator free run frequency setting by data bus control
US5774195A (en) * 1995-01-24 1998-06-30 Kabushiki Kaisha Toshiba Broadcasting system discriminating television receiver for differentiating between analog and digital telecast signals
JP3360004B2 (ja) * 1997-03-20 2002-12-24 松下電器産業株式会社 無線受信装置
US6163687A (en) * 1997-07-22 2000-12-19 Intel Corporation Tuning module for a dual frequency PLL synthesized tuner
US6567654B1 (en) * 1999-10-28 2003-05-20 Matsushita Electronic Components De Baja California, S.A. De C.V. Elimination of spurious signals in double conversion tuner using a dynamic intermediate frequency and a preselected crystal reference frequency
US6704555B2 (en) * 2001-01-09 2004-03-09 Qualcomm, Incorporated Apparatus and method for calibrating local oscillation frequency in wireless communications
US7543393B2 (en) * 2003-12-16 2009-06-09 Renishaw Plc Method of calibrating a scanning system
FR2867926B1 (fr) * 2004-03-16 2006-07-07 St Microelectronics Sa Procede et systeme de reception satellitaire

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US4365349A (en) * 1980-02-01 1982-12-21 Nippon Gakki Seizo Kabushiki Kaisha Radio receiver having phase locked loop and automatic frequency control loop for stably maintaining local oscillator frequency of voltage-controlled local oscillator
JPS57119512A (en) * 1981-01-19 1982-07-26 Toshiba Corp Frequency control system
JPS5957534A (ja) * 1982-09-27 1984-04-03 Alps Electric Co Ltd 衛星放送用受信器の屋内ユニツト
US4575761A (en) * 1983-04-28 1986-03-11 Rca Corporation AFT arrangement for a double conversion tuner
WO1984004637A1 (en) * 1983-05-16 1984-11-22 Motorola Inc A receiver system for eliminating self-quieting spurious responses
US4581643A (en) * 1983-07-25 1986-04-08 Rca Corporation Double conversion television tuner with frequency response control provisions
JPS6016718A (ja) * 1984-06-04 1985-01-28 Sanyo Electric Co Ltd デジタル式電子同調方式
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100401242B1 (ko) * 1996-07-26 2003-12-24 엘지이노텍 주식회사 위성방송수신용 튜너

Also Published As

Publication number Publication date
JPS63161718A (ja) 1988-07-05
EP0273389A3 (en) 1989-01-25
KR910001375B1 (ko) 1991-03-04
DE3781655T2 (de) 1993-01-28
US4817195A (en) 1989-03-28
DE3781655D1 (de) 1992-10-15
EP0273389B1 (en) 1992-09-09
EP0273389A2 (en) 1988-07-06

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