KR960012705A - Conversion synchronizer - Google Patents

Conversion synchronizer Download PDF

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Publication number
KR960012705A
KR960012705A KR1019940025069A KR19940025069A KR960012705A KR 960012705 A KR960012705 A KR 960012705A KR 1019940025069 A KR1019940025069 A KR 1019940025069A KR 19940025069 A KR19940025069 A KR 19940025069A KR 960012705 A KR960012705 A KR 960012705A
Authority
KR
South Korea
Prior art keywords
frequency
output
amplifier
band
oscillator
Prior art date
Application number
KR1019940025069A
Other languages
Korean (ko)
Other versions
KR970007883B1 (en
Inventor
백승규
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 KR1019940025069A priority Critical patent/KR970007883B1/en
Publication of KR960012705A publication Critical patent/KR960012705A/en
Application granted granted Critical
Publication of KR970007883B1 publication Critical patent/KR970007883B1/en

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Classifications

    • 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
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J2200/00—Indexing scheme relating to tuning resonant circuits and selecting resonant circuits
    • H03J2200/08—Calibration of receivers, in particular of a band pass filter

Abstract

본 발명은 변환 동조장치(Conuersion Tuner)에 관한 것으로 특히 1차발진기의 주파수를 다수의 밴드(Band)로 분리하여 특정 주파수대역의 주파수 가변특성을 개선하고자 한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a conversion tuner, and in particular, to divide frequency of a primary oscillator into a plurality of bands to improve frequency variable characteristics of a specific frequency band.

종래 변환 동조장치는 1차중간주파수를 얻는데 있어서. UHF, VHF 전대역을 하나의 1차발진기를 이용하므로서, 특정 주파수대역의 주파수특성을 변화시키려면 대역전체가 영향을 받게되며. 또한 위성방송(BS) 동조기의 수신주파수대역과 근접해 있거나 중복될 경우에는 방해 배제능력이 부족한 문제점이 있었다.Conventional conversion tuning devices are used to obtain a primary intermediate frequency. By using one primary oscillator for all UHF and VHF bands, the whole band is affected to change the frequency characteristics of a specific frequency band. In addition, there is a problem that the interference rejection ability is insufficient in the proximity or overlap with the reception frequency band of the satellite broadcasting (BS) tuner.

본 발명은 이와같은 종래의 문제점을 해결하기 위하여 1차발진기의 발진주파수를 다수의 대역으로 분리하여 사용하도록 하므로서, 특정 주파수대역의 주파수 특성가변을 용이하게, 1차발진주파수가 865~119MHz이므로 위성방송 수신주파수대역에 영향을 받지 않도록 할수 있는 것이다.In order to solve the conventional problems, the present invention allows the oscillation frequency of the primary oscillator to be separated into a plurality of bands so that the frequency characteristics of a specific frequency band can be easily changed. It is possible to avoid being influenced by the broadcast reception frequency band.

Description

변환 동조장치Conversion synchronizer

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

제2도는 본 발명 변화 동조장치의 구성블럭도.2 is a block diagram of a change tuning device of the present invention.

Claims (2)

신호주파수를 수신하는 안테나(1)와, 상기 안테나(1)에서 수신된 주파수의 일정한 대역만을 통과시키는 대역통과필터(2)와, 상기 대역통과필터(2)에 출력된 주파수를 증폭하는 제1증폭기(3)와, 상기 제1증폭기(3)에서 증폭출력된 주파수대역에 알맞는 발진주파수를 선택하여 출력하는 발진부(11)와, 상기 제1증폭기(3)에서 증폭출력된 주파수와 발진부(11)에서 출력된 주파수를 혼합하여 1차중간주파수를 출력하는 제1혼합기(5)와, 상기 제1혼합기(5)에서 출력된 1차중간주파수를 필터링하여 제2증폭기(7)로 출력하는 제1중간주파필터부(6)와, 상기 제1중간주파필터부(6)에서 출력된 주파수를 증폭하는 제2증폭기(7)와, 일정한 발진주파수를 출력하는 2차발진기(8)와, 제2증폭기(7)에서 증폭출력된 주파수를 혼합하여 2차중간주파수를 출력하는 제2혼합기(9)와, 상기 제2혼합기(9)에서 혼합출력된 주파수를 2차필터링하여 최종 중간주파수를 출력하는 제2중간주파필터부(10)로 구성된것을 특징으로 하는 변환 동조장치.An antenna 1 for receiving a signal frequency, a band pass filter 2 for passing only a predetermined band of the frequency received by the antenna 1, and a first amplifying a frequency output to the band pass filter 2; An oscillator 11 for selecting and outputting an oscillation frequency suitable for the amplifier 3, the frequency band amplified and output from the first amplifier 3, and the frequency and oscillator amplified and output from the first amplifier 3 ( 11) the first mixer 5 for mixing the frequencies output from the output to the first intermediate frequency, and the first intermediate frequency output from the first mixer (5) to filter and output to the second amplifier (7) A first intermediate frequency filter unit 6, a second amplifier 7 for amplifying the frequency output from the first intermediate frequency filter unit 6, a secondary oscillator 8 for outputting a constant oscillation frequency, A second mixer 9 for mixing a frequency amplified and output from the second amplifier 7 and outputting a secondary intermediate frequency; Second mixer 9 converts the tuning device according to claim 2 consisting of the intermediate frequency filter unit (10) for outputting a final intermediate-frequency by mixing the output frequency from the second filter. 제1항에 있어서, 상기 발진부(11)는 각기 다른 발진주파수를 출력하는 N개의 1차 발진기(D1~Dn)와, 상기 제1증폭기(3)에서 증폭출력된 주파수대역에 알맞는 1차발진기(D1~Dn)를 선택하는 대역선택기(11A)로 구성된것을 특징으로 하는 변환 동조장치.The oscillator (11) according to claim 1, wherein the oscillator (11) includes N primary oscillators (D1 to Dn) for outputting different oscillation frequencies, and primary oscillators suitable for the frequency band amplified and output from the first amplifier (3). And a band selector (11A) for selecting (D1 to Dn). ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019940025069A 1994-09-30 1994-09-30 Tuner device KR970007883B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019940025069A KR970007883B1 (en) 1994-09-30 1994-09-30 Tuner device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019940025069A KR970007883B1 (en) 1994-09-30 1994-09-30 Tuner device

Publications (2)

Publication Number Publication Date
KR960012705A true KR960012705A (en) 1996-04-20
KR970007883B1 KR970007883B1 (en) 1997-05-17

Family

ID=19394167

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019940025069A KR970007883B1 (en) 1994-09-30 1994-09-30 Tuner device

Country Status (1)

Country Link
KR (1) KR970007883B1 (en)

Also Published As

Publication number Publication date
KR970007883B1 (en) 1997-05-17

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