KR980004801A

KR980004801A - Automatic Voltage Regulator in Optical Disc Player

Info

Publication number: KR980004801A
Application number: KR1019960025083A
Authority: KR
Inventors: 임한섭
Original assignee: 배순훈; 대우전자 주식회사
Priority date: 1996-06-28
Filing date: 1996-06-28
Publication date: 1998-03-30

Abstract

본 발명은 광 디스크 플레이어에서의 자동 전압 조절 장치에 관한 것으로, RF/서보 신호 처리부(30)로부터 제공되는 RF신호의 레벨을 제어하는 자동 게인 제어부(42)와, 자동 게인 제어부(42)의 출력 신호를 버퍼링하여 출력하는 버퍼(44)와, 상기 버퍼(44)로부터 제공되는 신호의 피크치를 검출하여 출력하는 피크 검출부(46)와, 피크 검출부(46)로부터 제공되는 피크치를 사전 설정된 피크치와 비교하여 이에따른 펄스폭 변조 신호를 출력하는 마이컴(48)과, 마이컴(48)으로부터 제공되는 상기 펄스폭 변조 신호를 DC 전압으로 변환하고 이를 상기 자동 게인 제어부(42)로 제공하여 상기 자동 게인 조절부의 증폭도를 제어하는 저역 통과 필터를 포함하고 구성된다.The present invention relates to an automatic voltage regulator in an optical disk player and includes an automatic gain control unit 42 for controlling the level of an RF signal provided from the RF / servo signal processing unit 30, an output of the automatic gain control unit 42 A peak detector 46 for detecting and outputting a peak value of a signal provided from the buffer 44 and a peak detector 46 for comparing the peak value provided from the peak detector 46 with a preset peak value The microcomputer 48 converts the pulse width modulation signal provided from the microcomputer 48 into a DC voltage and supplies the converted DC voltage to the automatic gain control unit 42, And a low-pass filter for controlling the amplification degree.

따라서 본 발명은, 디스크 제작과정에서의 특성열화 및 보관상의 미숙으로 인한 디스크의 손상이 발생하여 재생시 RF신호의 레벨이 재생 가능한 레벨이하로 낮아지는 경우에도 그 신호 레벨을 기준치 이상으로 일정하게 유지하여 재생이 원할이 이루어지도록 하는 장점이 있다.Therefore, even when the level of the RF signal is lowered to a reproducible level or less during reproduction due to the deterioration of characteristics and the damage to the disk due to insufficient storage in the disk manufacturing process, the present invention maintains the signal level constant So that the reproduction can be done easily.

Description

Automatic Voltage Regulator in Optical Disc Player

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is a trivial issue, I did not include the contents of the text.

제2도는 본 발명에 따른 자동 전압 조정장치가 채택된 광 티스크 플레이어의 개략적인 블럭도.FIG. 2 is a schematic block diagram of an optical disc player employing an automatic voltage regulator according to the present invention; FIG.

Claims

An optical pickup unit 20 for executing an optical pickup from the disc D and converting the picked up signal into an electrical signal and outputting the electrical signal; an optical pickup unit 20 for amplifying a signal provided from the optical pickup unit 20 to a predetermined level, And an RF / servo signal processing unit (30) for outputting an RF signal to the optical disc player (20), wherein when the voltage level of the RF signal is lower than a predetermined reference level, An automatic gain control unit (42) for controlling a level of an RF signal provided from the RF / servo signal processing unit (30); A buffer 44 for buffering and outputting an output signal of the automatic gain control unit; A peak detector 46 for detecting and outputting a peak value of a signal provided from the buffer 44; A microcomputer 48 for comparing the peak value provided from the peak detector 46 with a predetermined reference peak value and outputting a corresponding pulse width modulation signal; And a low pass filter (50) for converting the pulse width modulation signal provided from the microcomputer (48) to a DC voltage and providing the DC voltage to the automatic gain control unit (42) to control the amplification degree of the automatic gain control unit Automatic voltage regulator in player.

※ Note: It is disclosed by the contents of the first application.