KR960025511A

KR960025511A - Spindle Motor Control Circuit for Optical Disc and Magneto-Optical Disc System

Info

Publication number: KR960025511A
Application number: KR1019940040656A
Authority: KR
Inventors: 김태진
Original assignee: 김광호; 삼성전자 주식회사
Priority date: 1994-12-31
Filing date: 1994-12-31
Publication date: 1996-07-20

Abstract

본 발명은 광디스크 및 광자기 디스크 시스템에 있어서 스핀들 모터 제어회로에 관한 것으로서, 광헤드에 의해 광디스크 및 광자기 디스크로 부터 재생된 디지탈 데이타로부터 추출된 동기신호의 한 주기를 카운트하고, 동기신호의 한 주기의 카운트값으로부터 스핀들 모터의 속도에러를 검출하기 위한 속도 검출기와, 동기신호와 기준신호와의 위상차를 카운트하고, 카운트값으로부터 스핀들 모터의 위상에러를 검출하기 위한 위상비교기와, 속도검출기에서 출력되는 속도에러와 위상비교기에서 출력되는 위상에러로부터 스핀들 모터의 구동이득을 자동으로 조정하기 위한 이득조정기로 구성된다. 따라서, 주파수 제어 뿐만 아니라 위상제어를 PWM방법을 사용하여 스핀들 모터를 구동하며, 이와 더불어 구동부에서의 서보 루프 이득을 속도 에러에 따라 3단계로 나누어 이득을 자동으로 변환하여 줌으로서 디스크의 크기 및 질량에 무관하게 스핀들 모터를 구동할 수 있다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spindle motor control circuit in an optical disc and a magneto-optical disc system, wherein a period of a synchronization signal extracted from digital data reproduced from the optical disc and the magneto-optical disc by the optical head is counted, A speed detector for detecting the speed error of the spindle motor from the count value of the period, a phase comparator for counting the phase difference between the synchronization signal and the reference signal, and a phase comparator for detecting the phase error of the spindle motor from the count value, and output from the speed detector It consists of a gain adjuster for automatically adjusting the drive gain of the spindle motor from the speed error and the phase error output from the phase comparator. Therefore, not only the frequency control but also the phase control drives the spindle motor by using the PWM method, and the servo loop gain in the drive unit is divided into three stages according to the speed error to automatically convert the gain to give the size and mass of the disk. The spindle motor can be driven regardless.

Description

Spindle Motor Control Circuit for Optical Disc and Magneto-Optical Disc System

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

제1도는 광디스크 및 광자기 디스크 시스템에 있어서 본 발명에 의한 스핀들 모터 제어회로의 구성도, 제2도는 제1도에 도시된 이득 조정기의 상세블럭도.1 is a configuration diagram of a spindle motor control circuit according to the present invention in an optical disk and a magneto-optical disk system, and FIG. 2 is a detailed block diagram of the gain adjuster shown in FIG.

Claims

In an optical disc and a magneto-optical disc system, one period of a synchronization signal extracted from digital data reproduced from the optical disc and the magneto-optical disc by the optical head is counted, and the speed error of the spindle motor is counted from the count value of one period of the synchronization signal. A speed detector for detecting; A phase comparator for counting a phase difference between the synchronization signal and a reference signal and detecting a phase error of the spindle motor from a count value; And a gain adjuster for automatically adjusting the drive gain of the spindle motor from the speed error output from the speed detector and the phase error output from the phase comparator.

The spindle motor control of claim 1, wherein the speed detector adjusts the driving gain of the spindle motor when the count value of one period of the synchronization signal is a reference value, less than a reference value, or more than a reference value. Circuit.

The phase comparator of claim 1, wherein the phase comparator adjusts the driving gain of the spindle motor when the count value of the phase difference between the synchronization signal and the reference signal is a reference value, less than a reference value, or more than a reference value. Spindle motor control circuit.

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