KR900004101A - 텔레비젼 튜너 - Google Patents

텔레비젼 튜너 Download PDF

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Publication number
KR900004101A
KR900004101A KR1019890011070A KR890011070A KR900004101A KR 900004101 A KR900004101 A KR 900004101A KR 1019890011070 A KR1019890011070 A KR 1019890011070A KR 890011070 A KR890011070 A KR 890011070A KR 900004101 A KR900004101 A KR 900004101A
Authority
KR
South Korea
Prior art keywords
signal
television
frequency
converting
band filter
Prior art date
Application number
KR1019890011070A
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English (en)
Other versions
KR920010240B1 (ko
Inventor
히데키 오토
Original Assignee
아오이 죠이치
가부시기가이샤 도시바
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 아오이 죠이치, 가부시기가이샤 도시바 filed Critical 아오이 죠이치
Publication of KR900004101A publication Critical patent/KR900004101A/ko
Application granted granted Critical
Publication of KR920010240B1 publication Critical patent/KR920010240B1/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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/20—Adaptations for transmission via a GHz frequency band, e.g. via satellite
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J5/00—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner
    • H03J5/24—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner with a number of separate pretuned tuning circuits or separate tuning elements selectively brought into circuit, e.g. for waveband selection or for television channel selection
    • H03J5/242—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner with a number of separate pretuned tuning circuits or separate tuning elements selectively brought into circuit, e.g. for waveband selection or for television channel selection used exclusively for band selection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/10—Adaptations for transmission by electrical cable

Abstract

내용 없음.

Description

텔레비젼 튜너
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음
제1도는 본 발명에 따라 텔레비젼 튜너의 한 실시예를 예시하는 블록도.
제2도는 본 발명의 다른 실시예를 예시하는 블록도.
제3도는 종래의 공정 시스템에 있어서 각 집에 TV신호를 전송할 때의 케이블 배선도.
* 도면의 주요부분에 대한 부호의 설명
11 : 입력단자 12 : 고대역 필터
13 : 저대역 필터 14 : 광대역 증폭기
15 : 제1혼합기 16 : 국부 발진기
17, 20, 23 : 대역 필터 21 : 제2혼합기
22 : 국부 발진기

Claims (6)

  1. 각각의 안테나에 의해 수신되는 공통 케이블로 혼합해 전송되는 VHF신호, UHF신호 및 위성 방송 신호를 복조하는 텔레비젼 튜너에 있어서, 상기 케이블로부터 혼합된 신호를 받아들이는 입력수단(11, 12, 13, 14)과, 가변조 주파수를 갖는 제1발진 수단(16)과, 이 제1발진수단(16)의 출력 및 상기 혼합신호를 받아 상기 혼합 신호중의 VHF신호 및 UHF신호가 텔레비젼 수상기에서 사용될 때, 상기 혼합 신호를 제1중간 주파수 신호로 변환하고, 상기 혼합 신호중의 위성 방송신호가 텔레비젼 수상기에 사용될 때, 상기 혼합신호를 제2의 중간주파수 신호로 변환하는 제1주파수 변환수단(15)과, 제1의 주파수 변환수단(15)에 접속되는 상기 제1중간주파수 신호를 선택적으로 통과시키도록 구성된 제1대역 필터(20)와, 상기 제1주파수 변환수단(15)에 접속되어 상기 제2중간 주파수 신호를 선택적으로 통과시키도록 구성된 제2대역필터(17)와, 상기 제1(20) 및 제2(17)의 대역 필터를 통해 얻어진 VHF신호, UHF신호 및 위성방송 신호를 처리하고, 각각 표준 VHF텔레비젼 신호, 표준 UHF텔레비젼 신호 및 표준 위성 텔레비젼 방송 신호로 변환하는 수단(21, 22, 23, 24, 18, 19)을 구비하는 것을 특징으로 하는 텔레비젼 튜너.
  2. 제1항에 있어서, 상기 처리 수단(21, 22, 23, 24, 18, 19)이 고정 주파수를 갖는 제2발진수단(22)과, 이 제2발진수단(22)의 출력 및 상기 제1대역필터(20)의 출력을 받아 상기 제1대역 필터(20)의 출력을 제3중간 주파수 신호로 변환하는 제2의 주파수 변환수단(21)과, 상기 제3중간 주파수 신호를 선택적으로 통과시키도록 구성된 제3대역 필터(23)와, 이 제3대역필터(23)에 접속되어 상기 표준 VHF텔레비젼 신호 및 표준 UHF텔레비젼 신호를 출력하는 제1증폭수단(24)을 구비하는 것을 특징으로 하는 텔레비젼 튜너.
  3. 제1항에 있어서, 상기 처리 수단(21, 22, 23, 24, 18, 19)이 상기 표준 위성 텔레비젼 방송 신호를 출력하는 제2증폭수단(18)을 구비하는 것을 특징으로 하는 텔레비젼 튜너.
  4. 제1항에 있어서, 상기 입력수단(11, 12, 13, 14)이, 상기 혼합 신호의 일부로서 받아 들여진 상기 VHF신호, UHF신호 및 위성 방송 신호의 하나를 선택적으로 통과시키는 필터 수단(12, 13)을 구비하는 것을 특징으로 하는 텔레비젼 튜너.
  5. 제4항에 있어서, 상기 필터 수단이 각각 가변 차단 주파수를 갖는 고대역 필터(12, 13)를 갖는 것을 특징으로 하는 텔레비젼 튜너.
  6. 제4항에 있어서, 상기 필터 수단이 각각 고정 주파수 대역을 갖는 적어도 2개의 대역 필터(32, 33)에서 선택적으로 절환해 공급하는 스위치 수단(31)을 구비하는 것을 특징으로 하는 텔레비젼 튜너.
    ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
KR1019890011070A 1988-08-03 1989-08-03 텔레비젼 튜너 KR920010240B1 (ko)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP193998 1988-08-03
JP63193998A JPH0243822A (ja) 1988-08-03 1988-08-03 テレビジョンチューナ

Publications (2)

Publication Number Publication Date
KR900004101A true KR900004101A (ko) 1990-03-27
KR920010240B1 KR920010240B1 (ko) 1992-11-21

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Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019890011070A KR920010240B1 (ko) 1988-08-03 1989-08-03 텔레비젼 튜너

Country Status (3)

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US (1) US5010400A (ko)
JP (1) JPH0243822A (ko)
KR (1) KR920010240B1 (ko)

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Also Published As

Publication number Publication date
JPH0243822A (ja) 1990-02-14
KR920010240B1 (ko) 1992-11-21
US5010400A (en) 1991-04-23

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