KR970076683A - A linear velocity control device of an optical disc player system - Google Patents

A linear velocity control device of an optical disc player system Download PDF

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Publication number
KR970076683A
KR970076683A KR1019960014683A KR19960014683A KR970076683A KR 970076683 A KR970076683 A KR 970076683A KR 1019960014683 A KR1019960014683 A KR 1019960014683A KR 19960014683 A KR19960014683 A KR 19960014683A KR 970076683 A KR970076683 A KR 970076683A
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KR
South Korea
Prior art keywords
reproduced
pwm
optical disc
signal
generating
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KR1019960014683A
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Korean (ko)
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KR100195013B1 (en
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정병국
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김광호
삼성전자 주식회사
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Priority to KR1019960014683A priority Critical patent/KR100195013B1/en
Publication of KR970076683A publication Critical patent/KR970076683A/en
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Abstract

본 발명은 광 디스크 플레이어 시스템이 정선속도(Constant Line Velocity : 이하 CLV라 칭함) 제어 방법에 관한 것으로, 특히 광 디스크플레이어의 스핀들 모터의 회전 속도를 디지탈 제어 방식에 의해 정선속도로 제어하는 광 디스크 플레이어 시스템의 정선속도 제어 장치에 관한 것이다. 상기의 제어장치는 광 디스크로부터 재생된 EFM신호로부터 검출된 재생클럭 WCLK를 소정분주하여 재생분주된 재생분주클럭 WCLK-4를 발생하는 클럭추출수단과, 상기 추출된 재생 분주클럭 WCLK-4의 주기를 미리설정된 제어클럭 clkf으로서 카운팅하여 출력하는 카운터와, 상기 카운터로부터 출력되는 출력값을 미리 설정된 최소, 최대값과 비교하여 CLV를 위한 PWM제어신호를 발생하는 제어기와, 상기 제어기로부터 출력도는 PWM제어신호에 대응하는 PWM신호를 발생하는 PWM발생기를 포함하여 구성된다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of controlling a constant velocity (hereinafter referred to as " CLV ") in an optical disc player system, and more particularly to a method and apparatus for controlling the rotation speed of a spindle motor of an optical disc player, To a constant speed control device of a system. The control device includes clock extracting means for generating a reproduced and divided reproduced and frequency-divided clock WCLK-4 by dividing the reproduced clock WCLK detected from the EFM signal reproduced from the optical disc by a predetermined ratio, And a controller for generating a PWM control signal for CLV by comparing an output value output from the counter with a preset minimum and maximum value, and a controller for outputting a PWM control signal And a PWM generator for generating a PWM signal corresponding to the signal.

Description

광 디스크 플레이어 시스템의 정선속도 제어 장치A linear velocity control device of an optical disc player system

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

제6도는 본 발명에 따른 광 디스크 프러레이어 시스템의 CLV 제어회로의 블록도를 도시한 도면.FIG. 6 is a block diagram of a CLV control circuit of an optical disc player system according to the present invention; FIG.

Claims (3)

광 디스크 플레이어 시스템의 정선속도 제어장치에 있어서, 광 디스크로부터 재생된 EFM신호로부터 검출된 재생클럭 WCLK를 소정분주하여 재생분주된 재생분주클럭 WCLK-4를 발생하는 클럭추출수단과, 상기 추출된 재생분주클럭 WCLK-4의 주기를 미리설정된 제어클럭 clkf으로서 카운팅하여 출력하는 카운터와, 상기 카운터로부터 출력되는 출력값을 미리 설정된 최소, 최대값과 비교하여 CLV를 위한 PWM제어신호를 발생하는 제어기와, 상기 제어기로부터 출력되는 PWM제어신호에 대응하는 PWM신호를 발생하는 PWM발생기를 포함하여 구성함을 특징으로 하는 광디스크 플레이어 시스템의 정선속도 제어장치.CLAIMS 1. An apparatus for controlling a constant speed of an optical disc player system, comprising: clock extracting means for generating reproduced and divided reproduced and divided clocks WCLK-4 by dividing a reproduced clock WCLK detected from an EFM signal reproduced from an optical disc, A counter for counting and outputting the cycle of the divided clock WCLK-4 as a preset control clock clkf, and a controller for generating a PWM control signal for CLV by comparing the output value output from the counter with a preset minimum and maximum value, And a PWM generator for generating a PWM signal corresponding to a PWM control signal output from the controller. 제1항에 있어서, 상기 제어기는 외부로부터 제공되는 이득모드제어신호에 응답하여 상기 PWM신호의 듀티를 가변하는 PWM이득제어기를 더 포함함은 특징으로 하는 광 디스크 플레이어 시스템의 정선속도 제어장치.The apparatus of claim 1, wherein the controller further comprises a PWM gain controller that varies a duty of the PWM signal in response to an externally provided gain mode control signal. 제1항에 있어서, 상기 제어클럭 clkf는 음성신호의 표본화 주파수fs(fs=44.1kHz)을 하기 식과 같이 변경 하여된 주파수를 가짐을 특징으로 하는 광 디스크 플레이어 시스템의 정선속도 제어장치. clkf=((96.fs)·n 단, n은 정수임.The apparatus according to claim 1, wherein the control clock (clkf) has a frequency that is obtained by changing a sampling frequency fs (fs = 44.1 kHz) of a voice signal as follows: clkf = ((96.fs) .n where n is an integer. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: It is disclosed by the contents of the first application.
KR1019960014683A 1996-05-06 1996-05-06 Fixed speed control device of optical disc player system KR100195013B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019960014683A KR100195013B1 (en) 1996-05-06 1996-05-06 Fixed speed control device of optical disc player system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019960014683A KR100195013B1 (en) 1996-05-06 1996-05-06 Fixed speed control device of optical disc player system

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KR970076683A true KR970076683A (en) 1997-12-12
KR100195013B1 KR100195013B1 (en) 1999-06-15

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KR1019960014683A KR100195013B1 (en) 1996-05-06 1996-05-06 Fixed speed control device of optical disc player system

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KR100195013B1 (en) 1999-06-15

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