KR970055332A - Digital Satellite Tuner - Google Patents

Digital Satellite Tuner Download PDF

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Publication number
KR970055332A
KR970055332A KR1019950050745A KR19950050745A KR970055332A KR 970055332 A KR970055332 A KR 970055332A KR 1019950050745 A KR1019950050745 A KR 1019950050745A KR 19950050745 A KR19950050745 A KR 19950050745A KR 970055332 A KR970055332 A KR 970055332A
Authority
KR
South Korea
Prior art keywords
signal
digital
output
unit
amplifier
Prior art date
Application number
KR1019950050745A
Other languages
Korean (ko)
Other versions
KR0158595B1 (en
Inventor
정대영
Original Assignee
이형도
삼성전기 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 이형도, 삼성전기 주식회사 filed Critical 이형도
Priority to KR1019950050745A priority Critical patent/KR0158595B1/en
Publication of KR970055332A publication Critical patent/KR970055332A/en
Application granted granted Critical
Publication of KR0158595B1 publication Critical patent/KR0158595B1/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
    • H03J3/06—Arrangements for obtaining constant bandwidth or gain throughout tuning range or ranges
    • H03J3/08—Arrangements for obtaining constant bandwidth or gain throughout tuning range or ranges by varying a second parameter simultaneously with the tuning, e.g. coupling bandpass filter
    • 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
    • H04N5/4446—IF amplifier circuits specially adapted for B&W TV

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Circuits Of Receivers In General (AREA)

Abstract

본 발명은 안테나로부터 고주파신호를 입력받아 베이스밴드의 오디오신호와 비디오신호를 출력하는 디지탈 위성방송튜너에 관한 것으로, 선택된 채널신호를 입력받아 중간주파신호로 변환하는 아날로그부와, 상기 아날로그부로부터 출력되는 중간주파신호를 복조하고, 디지탈신호로 변환하며, 디코딩 및 디스크램블하는 디지탈부를 일체로 구성하므로써, 회로설계가 간단하고, 생산적 측면 및 EMI측면에서 효율적인 효과가 있다.The present invention relates to a digital satellite broadcasting tuner that receives a high frequency signal from an antenna and outputs an audio signal and a video signal of a baseband. The present invention relates to an analog unit for receiving a selected channel signal and converting the signal into an intermediate frequency signal. By demodulating the intermediate frequency signal, converting the digital signal into a digital signal, and decoding and descramble the integrated digital part, the circuit design is simple and the productive side and the EMI side are effective.

Description

디지탈 위성방송 튜너Digital Satellite Tuner

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

제2도는 본 발명에 의한 위성방송튜너의 구성을 보여주는 블럭도이다.2 is a block diagram showing the configuration of a satellite broadcast tuner according to the present invention.

Claims (1)

디지탈 위성방송튜너에 있어서, 안테나로부터 입력되는 신호를 증폭하는 전치증폭부와, 설정된 채널에 따라서 통과대역이 가변하여 상기 전치증폭부로부터 출력되는 방송 신호를 통과시키는 가변대역통과필터와, 상기 가변대역통과필터로부터 입력되는 고주파신호를 중간주파신호로 변환하는 주파수변환부와, 상기 주파수변환부로부터 입력되는 중간주파대역신호를 증폭하는 IF증폭부와, 상기 IF증폭부로부터 출력신호중 IF대역을 선택하는 쏘필터부와, 상기 쏘필터부로부터 출력된 IF신호를 증폭하는 후치증폭부와, 상기 후치증폭부로부터 출력되는 IF신호의 전압레벨을 검출하여 상술한 전치증폭부와, IF증폭부의 증폭도를 조절하는 자동이득제어부와, 상기 후치증폭부로부터 출력되는 IF신호를 복조하여 I신호와 Q신호로 분리하는 I/Q복조부와, 상기 I/Q복조부로부터 입력되는 신호를 디지탈신호로 변환하는 아날로그/디지탈컨버터와, 상기 아날로그/디지탈컨버터로부터 입력되는 디지탈신호에서 전송도중 삽입된 에러를 검출하고 수정하는 디코딩부와, 상기 디코딩부로부터 입력되는 디지탈신호를 복원하는 디스크램블러와, 상기 디스크램블러와 출력단사이에 구비되는 정합회로인 출력부를 구비함을 특징으로 하는 디지탈 위성방송튜너.A digital satellite broadcasting tuner comprising: a preamplifier for amplifying a signal input from an antenna, a variable band pass filter for passing a broadcast signal output from the preamplifier by varying a pass band according to a set channel, and the variable band A frequency converter for converting the high frequency signal inputted from the pass filter into an intermediate frequency signal, an IF amplifier for amplifying the intermediate frequency band signal inputted from the frequency converter, and an IF band selected from the output signal from the IF amplifier. The amplification degree of the preamplifier and the IF amplification unit is adjusted by detecting the saw filter unit, a post amplifier for amplifying the IF signal output from the saw filter unit, and a voltage level of the IF signal output from the post amplifier unit. An automatic gain control section, an I / Q demodulation section that demodulates the IF signal output from the post-amplification amplifier into an I signal and a Q signal, An analog / digital converter for converting a signal input from an I / Q demodulator into a digital signal, a decoding unit for detecting and correcting an error inserted during transmission in a digital signal input from the analog / digital converter, and from the decoding unit And a descrambler for restoring an input digital signal, and an output unit which is a matching circuit provided between the descrambler and an output terminal. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019950050745A 1995-12-15 1995-12-15 Digital satellite broadcast tuner KR0158595B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019950050745A KR0158595B1 (en) 1995-12-15 1995-12-15 Digital satellite broadcast tuner

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019950050745A KR0158595B1 (en) 1995-12-15 1995-12-15 Digital satellite broadcast tuner

Publications (2)

Publication Number Publication Date
KR970055332A true KR970055332A (en) 1997-07-31
KR0158595B1 KR0158595B1 (en) 1999-03-20

Family

ID=19440639

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019950050745A KR0158595B1 (en) 1995-12-15 1995-12-15 Digital satellite broadcast tuner

Country Status (1)

Country Link
KR (1) KR0158595B1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100353861B1 (en) * 1999-11-11 2002-09-26 한국전자통신연구원 DTV Tuner Apparatus And Method For Broadband Auto Frequency Channel Selection Using Approximated Frequency Mapping Function
KR100539507B1 (en) * 1998-09-25 2006-02-28 엘지전자 주식회사 apparatus for selecting instance of audio/video control tuner in bus system

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100380723B1 (en) * 2001-05-25 2003-04-18 삼성전기주식회사 Digital satellite receiver with capability of improving receiving sensitivity in low field area
KR100895795B1 (en) * 2007-11-23 2009-05-07 광운대학교 산학협력단 Multicast both-way radio communications system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100539507B1 (en) * 1998-09-25 2006-02-28 엘지전자 주식회사 apparatus for selecting instance of audio/video control tuner in bus system
KR100353861B1 (en) * 1999-11-11 2002-09-26 한국전자통신연구원 DTV Tuner Apparatus And Method For Broadband Auto Frequency Channel Selection Using Approximated Frequency Mapping Function

Also Published As

Publication number Publication date
KR0158595B1 (en) 1999-03-20

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