KR970013689A - Digital satellite tuner - Google Patents

Digital satellite tuner Download PDF

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Publication number
KR970013689A
KR970013689A KR1019950028346A KR19950028346A KR970013689A KR 970013689 A KR970013689 A KR 970013689A KR 1019950028346 A KR1019950028346 A KR 1019950028346A KR 19950028346 A KR19950028346 A KR 19950028346A KR 970013689 A KR970013689 A KR 970013689A
Authority
KR
South Korea
Prior art keywords
frequency
signal
output
pass filter
band pass
Prior art date
Application number
KR1019950028346A
Other languages
Korean (ko)
Other versions
KR0166261B1 (en
Inventor
장재선
Original Assignee
배순훈
대우전자 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 배순훈, 대우전자 주식회사 filed Critical 배순훈
Priority to KR1019950028346A priority Critical patent/KR0166261B1/en
Publication of KR970013689A publication Critical patent/KR970013689A/en
Application granted granted Critical
Publication of KR0166261B1 publication Critical patent/KR0166261B1/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
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J3/00—Continuous tuning
    • H03J3/02—Details
    • H03J3/10—Circuit arrangements for fine tuning, e.g. bandspreading
    • 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)
  • Superheterodyne Receivers (AREA)

Abstract

본 발명은 디지탈 위성방송용 튜너에 관한 것으로, 한개의 국부발진기(10)에서 출력된 발진주파수를 제1주파수 혼합기(12)와 제2주파수혼합기(22)에 공통으로 입력하여, 하드웨어 구성이 단순할 뿐만 아니라 안정된 발진주파수를 제공할 수 있는 것이다.The present invention relates to a tuner for digital satellite broadcasting, and inputs the oscillation frequency output from one local oscillator 10 to the first frequency mixer 12 and the second frequency mixer 22 in common, so that the hardware configuration is simple. In addition, it can provide a stable oscillation frequency.

Description

디지탈 위성방송용 튜너Digital satellite tuner

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제2도는 본 발명에 따른 디지탈 위성방송용 튜너의 개략적인 구성도이다.2 is a schematic configuration diagram of a digital satellite tuner according to the present invention.

Claims (2)

주파수합성기(4)에서 출력된 채널선택신호에 따라 수신된 위성방송신호 중에서 원하는 채널신호를 선택하여 출력하는 제1대역 통과필터(6)와; 상기 채널신호와 발진주파수를 혼합하여 상기 채널신호의 주파수를 다운시켜 제1중간주파수신호를 출력하는 제1주파수혼합기(12); 상기 제1중간주파수신호를 필터링하여 출력하는 제2대역통과필터(16) 및 ; 상기 제2대역통과필터(16)에서 출력된 제1중간주파수신호와 발진주파수를 혼합하여 상기 제1중간주파수신호의 주파수를 다운시켜 제2중간주파수신호를 출력하는 제2주파수혼합기(20)를 포함하여 구성된 디지탈 위성방송용 튜너에 있어서, 상기 제1주파수혼합기(12)와 제2주파수혼합기(20)는, 제1국부발진기(10)에서 출력되는 발진주파수를 공통으로 입력받는 것을 특징으로 하는 디지탈 위성방송용 튜너.A first band pass filter 6 for selecting and outputting a desired channel signal from the satellite broadcast signals received according to the channel selection signal output from the frequency synthesizer 4; A first frequency mixer 12 for mixing the channel signal and the oscillation frequency to lower the frequency of the channel signal to output a first intermediate frequency signal; A second band pass filter 16 for filtering and outputting the first intermediate frequency signal; The second frequency mixer 20 which mixes the first intermediate frequency signal and the oscillation frequency output from the second band pass filter 16, lowers the frequency of the first intermediate frequency signal, and outputs a second intermediate frequency signal. In the digital satellite broadcast tuner, the first frequency mixer 12 and the second frequency mixer 20, the oscillation frequency output from the first local oscillator 10 in common, characterized in that the digital input; Satellite tuner. 제1항에 있어서, 상기 제2대역통과필터(16)는 상기 채널선택 신호에 따라 그 통과 대역을 가변할 수 있도록 구성된 것을 특징으로 하는 디지탈 위성방송용 튜너.The digital satellite broadcasting tuner of claim 1, wherein the second band pass filter (16) is configured to vary its pass band according to the channel selection signal. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019950028346A 1995-08-31 1995-08-31 Digital satellite broadcasting tuner KR0166261B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019950028346A KR0166261B1 (en) 1995-08-31 1995-08-31 Digital satellite broadcasting tuner

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019950028346A KR0166261B1 (en) 1995-08-31 1995-08-31 Digital satellite broadcasting tuner

Publications (2)

Publication Number Publication Date
KR970013689A true KR970013689A (en) 1997-03-29
KR0166261B1 KR0166261B1 (en) 1999-03-20

Family

ID=19425704

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019950028346A KR0166261B1 (en) 1995-08-31 1995-08-31 Digital satellite broadcasting tuner

Country Status (1)

Country Link
KR (1) KR0166261B1 (en)

Also Published As

Publication number Publication date
KR0166261B1 (en) 1999-03-20

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