KR970013687A - Satellite and air broadcasting integrated tuner - Google Patents

Satellite and air broadcasting integrated tuner Download PDF

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Publication number
KR970013687A
KR970013687A KR1019950026172A KR19950026172A KR970013687A KR 970013687 A KR970013687 A KR 970013687A KR 1019950026172 A KR1019950026172 A KR 1019950026172A KR 19950026172 A KR19950026172 A KR 19950026172A KR 970013687 A KR970013687 A KR 970013687A
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KR
South Korea
Prior art keywords
primary
output
amplifier
band pass
outputting
Prior art date
Application number
KR1019950026172A
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Korean (ko)
Inventor
최규환
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 KR1019950026172A priority Critical patent/KR970013687A/en
Publication of KR970013687A publication Critical patent/KR970013687A/en

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  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)

Abstract

본 발명은 위성방송(BS:Satellite Broadcasting) 및 에어방송 일체형 튜너(Tunner)에 관한 것으로, 특히 위성방송튜너와 에어방송튜너를 일체화함으로써, 회로가 간략화됨과 동시에 튜너가 소형화되고, 또한 생산 및 설치상에서 생산비 절감과 설치공간 절약등을 제공하는 위성방송 및 에어방송 일체형 튜너에 관한 것이다. 본 발명은 종래에 각각 분리되어 설치되는 위성방송튜너와 에어방송용튜너를 일체화하고, 또한 중간주파 대역통과필터로 선택도가 우수한 쏘필터를 공유하게 함으로써, 회로가 간략화됨과 동시에 튜너가 소형화되고, 또한 생산 및 설치상에서 생산비 절감 및 설치공간 절약등을 제공하는 발명이다.The present invention relates to satellite broadcasting (BS) and air broadcasting integrated tuner, and in particular, by integrating the satellite broadcasting tuner and the air broadcasting tuner, the circuit is simplified and the tuner is miniaturized, and also in production and installation. The present invention relates to a satellite and air broadcast all-in-one tuner that provides reduced production costs and installation space. The present invention integrates the satellite broadcasting tuner and the air broadcasting tuner, which are separately installed in the related art, and also allows the medium frequency bandpass filter to share the saw filter with excellent selectivity, thereby simplifying the circuit and miniaturizing the tuner. In the production and installation, the invention provides reduction of production cost and installation space.

Description

위성방송 및 에어방송 일체형 튜너Satellite and air broadcasting integrated tuner

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

제3도는 본 발명에 따른 위성방송 및 에어방송 일체형 튜너의 내부블록도.3 is an internal block diagram of a satellite and air broadcast integrated tuner according to the present invention.

Claims (1)

세개의 대역통과필터(41,42,43)를 선택적으로 동작시키도록 스위칭하는 방송선택스위치(40); 상기 방송선택스위치(40)에 의해 안테나(ANT-A, ANT-B)로부터 입력되는 신호중에 설정된 방송대역을 선택하여 통과시키는 대역통과필터(41,42,43) ; 상기 대역통과필터(41,42)를 통한 신호를 소정레벨로 감쇄 및 증폭하여 출력하는 감쇄기(44) 및 증폭기(45) ; 상기 대역통과필터(43)를 통한 신호를 AGC검출부(53)의 제어에 따라 증폭출력하는 증폭기(46) ; PLL(47)에 의한 전압에 따른 발진주파수를 출력하는 1차 VCO(48) ; 상기 VCO(48)의 발전주파수를 증폭하여 출력하는 버퍼증폭기(49) ; 상기 증폭기(45,46)의 출력신호와 버퍼증폭기(55)의 출력신호를 믹싱하여 1차 1F룰 출력하는 1차믹서(50) ; 상기 1차믹서(50)로부터 출력되는 1차IF를 선택하는 1차 IF용 SAW 대역통과필터(51) ; 상기 1차 IF용 SAW 대역통과필터(51)의 출력신호를 소정레벨로 증폭하여 에어방송신호와 위성방송신호를 분리하여 에어방송신호는 1차 IF용 대역통과필터(54)으로 출력하고, 위성방송신호는 위성방송신호를 위한 복조단으로 출력하는 1차 IF증폭기(52) ; 상기 1차 IF증폭기 (52)의 출력신호의 레벨을 검출하여 상기 증폭기(46)의 증폭비를 조절하는 AGC검출부(53) ; 상기 1차 IF증폭기(52)로부터 출력되는 1차 IF를 선택하여 출력하는 1차 IF용 대역통과필터(54) ; 설정된 발진주파수를 출력하는 2차 OSC(55) ; 상기 1차 IF용 대역통과필터(54)의 출력신호와 OSC(55)의 출력신호를 믹싱하여 2차 IF를 출력하는 2차믹서(56) ; 상기 2차믹서(56)로부터 출력되는 2차 IF를 증폭하는 2차IF증폭기(57) ; 상기 2차 IF증폭기(57)로부터 출력되는 2차 IF를 선택하여 에어방송신호를 위한 복조단으로 출력하는 2차 IF용 대역통과필터(58)를 구비함을 특징으로 하는 위성방송 및 에어방송 일체형 튜너.A broadcast selection switch 40 for switching the three band pass filters 41, 42, 43 to be selectively operated; A band pass filter (41, 42, 43) for selecting and passing a broadcast band set among signals input from the antennas (ANT-A, ANT-B) by the broadcast selection switch 40; An attenuator 44 and an amplifier 45 for attenuating and amplifying and outputting the signals through the band pass filters 41 and 42 to a predetermined level; An amplifier (46) for amplifying and outputting the signal through the band pass filter (43) under the control of the AGC detector (53); A primary VCO 48 for outputting an oscillation frequency according to the voltage by the PLL 47; A buffer amplifier 49 for amplifying and outputting a power generation frequency of the VCO 48; A primary mixer 50 for mixing the output signals of the amplifiers 45 and 46 and the output signals of the buffer amplifiers 55 and outputting the primary 1F rule; A SAW bandpass filter for primary IF selecting the primary IF output from the primary mixer 50; By amplifying the output signal of the first IF SAW band pass filter 51 to a predetermined level, the air broadcast signal and the satellite broadcast signal are separated, and the air broadcast signal is output to the first IF band pass filter 54, The broadcast signal is a primary IF amplifier 52 for outputting to the demodulation stage for the satellite broadcast signal; An AGC detector 53 for detecting the level of the output signal of the primary IF amplifier 52 to adjust the amplification ratio of the amplifier 46; A band pass filter 54 for the primary IF for selecting and outputting a primary IF output from the primary IF amplifier 52; A secondary OSC 55 for outputting a set oscillation frequency; A secondary mixer 56 for mixing the output signal of the first IF band pass filter 54 and the output signal of the OSC 55 to output a second IF; A secondary IF amplifier 57 for amplifying the secondary IF output from the secondary mixer 56; Integrated satellite broadcasting and air broadcasting integrated, characterized in that the secondary IF band pass filter 58 for selecting the second IF output from the IF amplifier 57 and outputs to the demodulation stage for the air broadcasting signal Tuner. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019950026172A 1995-08-23 1995-08-23 Satellite and air broadcasting integrated tuner KR970013687A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019950026172A KR970013687A (en) 1995-08-23 1995-08-23 Satellite and air broadcasting integrated tuner

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019950026172A KR970013687A (en) 1995-08-23 1995-08-23 Satellite and air broadcasting integrated tuner

Publications (1)

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KR970013687A true KR970013687A (en) 1997-03-29

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100412972B1 (en) * 1997-12-16 2003-12-31 노스포인트 테크놀로지 리미티드 Apparatus and method for reusing satellite broadcast spectrum for terrestrially broadcast signals
US7853197B2 (en) 1996-10-11 2010-12-14 Carmen Tawil Apparatus and method for reusing satellite broadcast spectrum for terrestrially broadcast signals

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7853197B2 (en) 1996-10-11 2010-12-14 Carmen Tawil Apparatus and method for reusing satellite broadcast spectrum for terrestrially broadcast signals
KR100412972B1 (en) * 1997-12-16 2003-12-31 노스포인트 테크놀로지 리미티드 Apparatus and method for reusing satellite broadcast spectrum for terrestrially broadcast signals

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