KR960019975A - Satellite tuner - Google Patents

Satellite tuner Download PDF

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Publication number
KR960019975A
KR960019975A KR1019940031502A KR19940031502A KR960019975A KR 960019975 A KR960019975 A KR 960019975A KR 1019940031502 A KR1019940031502 A KR 1019940031502A KR 19940031502 A KR19940031502 A KR 19940031502A KR 960019975 A KR960019975 A KR 960019975A
Authority
KR
South Korea
Prior art keywords
demodulators
switching circuit
tuner
diodes
satellite broadcasting
Prior art date
Application number
KR1019940031502A
Other languages
Korean (ko)
Other versions
KR970007886B1 (en
Inventor
임화현
Original Assignee
이종수
엘지전자부품 주식회사
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 이종수, 엘지전자부품 주식회사 filed Critical 이종수
Priority to KR1019940031502A priority Critical patent/KR970007886B1/en
Publication of KR960019975A publication Critical patent/KR960019975A/en
Application granted granted Critical
Publication of KR970007886B1 publication Critical patent/KR970007886B1/en

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Classifications

    • 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
    • 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

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Astronomy & Astrophysics (AREA)
  • General Physics & Mathematics (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
  • Circuits Of Receivers In General (AREA)

Abstract

본 발명은 혼합기에서 출력되어 증폭기와 대역통과필터를 통과한 중간주파를 외부선택신호에 의해서 스위칭하여 복수개의 복조기에 선택적으로 공급하도록 상기 복수개의 복조기 전단에 스위칭회로를 연결하여 이루어져 1개의 튜너를 이용하여 서로다른 복조방식을 가진 위성방송신호를 선택적으로 수신할 수 있어서 수신기의 제작단가를 저렴하게 할 수 있는 위성방송 수신용 튜너에 관한 것이다.The present invention uses a single tuner by connecting a switching circuit in front of the plurality of demodulators so as to switch the intermediate frequencies output from the mixer and the band pass filter through an external selection signal and selectively supply them to the plurality of demodulators. The present invention relates to a tuner for satellite broadcast reception capable of selectively receiving satellite broadcast signals having different demodulation methods, thereby reducing the manufacturing cost of the receiver.

Description

위성방송 수신용 튜너Satellite tuner

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음As this is a public information case, the full text was not included.

제2도는 본 발명에 따른 위성방송 수신용 튜너의 회로도.2 is a circuit diagram of a tuner for satellite broadcast reception according to the present invention.

Claims (2)

혼합기에서 출력되어 증폭기와 대역통과필터를 통과한 중간주파를 외부선택신호에 의해서 스위칭하여 복수개의 복조기에 선택적으로 공급하도록 상기 복수개의 복조기 전단에 스위칭회로를 연결한 것을 특징으로 하는 위성방송 수신용 튜너.A tuner for satellite broadcasting reception, characterized in that a switching circuit is connected to the front end of the plurality of demodulators to switch the intermediate frequency output from the mixer and the band pass filter through an external selection signal to selectively supply the plurality of demodulators. . 제1항에 있어서, 상기 스위칭회로는 복수개의 복조기 입력단에 서로 역방향으로 접속된 복수개의 다이오드와, 상기 복수개의 다이오드와 스위칭회로의 입력단이 연결된 분기점의 전위를 외부에 공급되는 선택신호(SW)에 의해서 제어하여 복수개의 복조기에 위성방송신호를 선택공급하도록 전압전압(Vcc)을 스위칭하는 복수개의 트랜지스터와, 증폭단의 출력단에 저항 및 콘덴서와 다이오드로 된 필터부로 구성된 것을 특징으로 하는 위성방송 수신용 튜너.The switching circuit of claim 1, wherein the switching circuit comprises a plurality of diodes connected to the plurality of demodulator input terminals in a reverse direction to each other and a potential of a branch point to which the plurality of diodes and the input terminal of the switching circuit are connected to the selection signal SW. Tuner for receiving satellite broadcasting comprising a plurality of transistors for switching the voltage voltage (Vcc) to control and selectively supply the satellite broadcasting signals to the plurality of demodulators, and a filter unit comprising resistors, capacitors and diodes at the output terminals of the amplifier stages. . ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019940031502A 1994-11-28 1994-11-28 Receiving tuner KR970007886B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019940031502A KR970007886B1 (en) 1994-11-28 1994-11-28 Receiving tuner

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019940031502A KR970007886B1 (en) 1994-11-28 1994-11-28 Receiving tuner

Publications (2)

Publication Number Publication Date
KR960019975A true KR960019975A (en) 1996-06-17
KR970007886B1 KR970007886B1 (en) 1997-05-17

Family

ID=19399242

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019940031502A KR970007886B1 (en) 1994-11-28 1994-11-28 Receiving tuner

Country Status (1)

Country Link
KR (1) KR970007886B1 (en)

Also Published As

Publication number Publication date
KR970007886B1 (en) 1997-05-17

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GRNT Written decision to grant
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