KR970014336A - Digital satellite tuner - Google Patents

Digital satellite tuner Download PDF

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Publication number
KR970014336A
KR970014336A KR1019950028347A KR19950028347A KR970014336A KR 970014336 A KR970014336 A KR 970014336A KR 1019950028347 A KR1019950028347 A KR 1019950028347A KR 19950028347 A KR19950028347 A KR 19950028347A KR 970014336 A KR970014336 A KR 970014336A
Authority
KR
South Korea
Prior art keywords
signal
output
frequency
outputting
local oscillator
Prior art date
Application number
KR1019950028347A
Other languages
Korean (ko)
Other versions
KR0171753B1 (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 KR1019950028347A priority Critical patent/KR0171753B1/en
Publication of KR970014336A publication Critical patent/KR970014336A/en
Application granted granted Critical
Publication of KR0171753B1 publication Critical patent/KR0171753B1/en

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H40/00—Arrangements specially adapted for receiving broadcast information
    • H04H40/18—Arrangements characterised by circuits or components specially adapted for receiving
    • H04H40/27—Arrangements characterised by circuits or components specially adapted for receiving specially adapted for broadcast systems covered by groups H04H20/53 - H04H20/95
    • H04H40/90—Arrangements characterised by circuits or components specially adapted for receiving specially adapted for broadcast systems covered by groups H04H20/53 - H04H20/95 specially adapted for satellite broadcast receiving
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/65—Arrangements characterised by transmission systems for broadcast
    • H04H20/71—Wireless systems
    • H04H20/74—Wireless systems of satellite networks
    • 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

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Astronomy & Astrophysics (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Multimedia (AREA)
  • Superheterodyne Receivers (AREA)

Abstract

본 발명은 디지탈 위성방송용 튜너에 관한 것으로, 자동이득제어신호에 따라 발진주파수를 출력하는 제3국부발진기(40)와; 상기 표면탄성파필터(24)를 통해 출력된 제2중간주파수신호와 상기 제3국부발진기(40)에서 출력된 발진주파수를 혼합하여 기저대역의Ⅰ신호를 출력하는 제3주파수혼합기(42)및; 상기 제3주파수혼합기(42)에서 출력된 기저대역의Ⅰ신호를 90도 만큼 위상을 변화시켜 Q 신호를 출력하는 위상시프터(44)를 포함하여 구성되어, 회로 구성이 간단하게 이루어지는 것이다.The present invention relates to a digital satellite broadcast tuner, comprising: a third local oscillator (40) for outputting an oscillation frequency in accordance with an automatic gain control signal; A third frequency mixer (42) for mixing a second intermediate frequency signal output through the surface acoustic wave filter (24) and an oscillation frequency output from the third local oscillator (40) to output baseband signal I; It comprises a phase shifter 44 which outputs a Q signal by shifting the phase of the baseband I signal output from the third frequency mixer 42 by 90 degrees, thereby simplifying the circuit configuration.

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)

제2주파수 혼합기(20)와 중간주파수증폭기(22) 및 표면탄성파필터(24)를 통해 출력된 제2중간주파수를 복조하여Ⅰ신호와 Q신호를 출력하는 디지탈 위성방송용 튜너에 있어서, 자동이득제어신호에 따라 발진주파수를 출력하는 제3국부발진기(40)와; 상기 표면탄성파필터(24)를 통해 출력된 제2중간주파수신호와 상기 제3국부발진기(40)에서 출력된 발진주파수를 혼합하여 기저대역의Ⅰ신호를 출력하는 제3주파수혼합기(42)및; 상기 제3주파수혼합기(42)에서 출력된 기저대역의Ⅰ신호를 90도 만큼 위상을 변화시켜 Q 신호를 출력하는 위상시프터(44)를 포함하여 구성된 것을 특징으로 하는 디지탈 위성방송용 튜너.In the digital satellite broadcasting tuner demodulating the second intermediate frequency output through the second frequency mixer 20, the intermediate frequency amplifier 22, and the surface acoustic wave filter 24, and outputting the I and Q signals, automatic gain control. A third local oscillator 40 outputting an oscillation frequency in accordance with the signal; A third frequency mixer (42) for mixing a second intermediate frequency signal output through the surface acoustic wave filter (24) and an oscillation frequency output from the third local oscillator (40) to output baseband signal I; And a phase shifter (44) for outputting a Q signal by shifting a phase of the baseband (I) signal output from the third frequency mixer (42) by 90 degrees. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019950028347A 1995-08-31 1995-08-31 Tuner for digital satellite broadcasting KR0171753B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019950028347A KR0171753B1 (en) 1995-08-31 1995-08-31 Tuner for digital satellite broadcasting

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019950028347A KR0171753B1 (en) 1995-08-31 1995-08-31 Tuner for digital satellite broadcasting

Publications (2)

Publication Number Publication Date
KR970014336A true KR970014336A (en) 1997-03-29
KR0171753B1 KR0171753B1 (en) 1999-03-20

Family

ID=19425706

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019950028347A KR0171753B1 (en) 1995-08-31 1995-08-31 Tuner for digital satellite broadcasting

Country Status (1)

Country Link
KR (1) KR0171753B1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100438541B1 (en) * 2001-09-11 2004-07-03 엘지전자 주식회사 Apparatus for receiving signal of mobile communication base station

Also Published As

Publication number Publication date
KR0171753B1 (en) 1999-03-20

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