KR960005544A

KR960005544A - VCR audio signal playback device

Info

Publication number: KR960005544A
Application number: KR1019940017363A
Authority: KR
Inventors: 김규종
Original assignee: 배순훈; 대우전자 주식회사
Priority date: 1994-07-19
Filing date: 1994-07-19
Publication date: 1996-02-23

Abstract

본 발명은 액티브밴드패스필터를 이용하여 방송방식에 의한 스위칭기능을 간소화시킨 VCR의 오디오신호 재생장치에 관한 것으로, 이를 해결하기 위해 기록매체로부터 재생되는 오디오시호중 L채널신호를 방송방식에 따라 적응적으로 필터링하는 제1액티브 밴드패스필터; 기록매체로 부터 재생되는 오디오신호중 R채널 신호를 방송방식에 따라 적응적로 필터링하는 제2액티브 밴드패스필터; 현재 처리되는 방송방식에 따라 상기 제1액티브 밴드패스필터와 상기 제2액티브 밴드패스필토터가 동작되도록 제어신호를 인가하는 방송방식 선택제어부를 포함하도록 구성된다.The present invention relates to an audio signal reproducing apparatus of a VCR that uses an active band pass filter to simplify a switching function by a broadcasting method. A first active band pass filter for filtering selectively; A second active band pass filter for adaptively filtering an R channel signal among audio signals reproduced from a recording medium according to a broadcasting method; And a broadcast method selection control unit for applying a control signal to operate the first active band pass filter and the second active band pass filter toter according to the currently processed broadcast method.

Description

VCR audio signal playback device

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

제2도는 본 발명에 의한 VCR의 오디오신호 재생장치를 나타낸 블럭도,2 is a block diagram showing an audio signal reproducing apparatus of a VCR according to the present invention;

제3도는 프리앰프에서 출력되는 신호성분에 대한 대역분포도,3 is a band distribution diagram for signal components output from a preamplifier,

제4도는 제2도에 도시된 액티브밴드패스필터의 상세회로도.4 is a detailed circuit diagram of the active band pass filter shown in FIG.

Claims

An audio signal reproducing apparatus of a VCR that reproduces and amplifies an audio signal recorded on a recording medium by FM modulation, and filters and demodulates the amplified audio signal. A first active bandpass filter adaptively filtering according to the first filter; A second active band pass filter for adaptively filtering an R channel signal among audio signals reproduced from the recording medium according to a broadcasting method; And a broadcast method selection control unit for applying a control signal to operate the first active band pass filter and the second active band pass filter according to the currently processed broadcast method. Device.

2. The first and second active band pass filters of claim 1, wherein the first and second active band pass filters are provided by an operational amplifier having a multi-valued structure in which audio signals of the L and R channels are input signals, and a control signal provided from the broadcasting method selection controller. And a transistor for controlling the structure of the multiple negative loops so that the cutoff frequency of the operational amplifier is differently selected according to a broadcasting method.

※ Note: The disclosure is based on the initial application.