KR970002931A - Brake Device for Optical Disc Replay System - Google Patents

Brake Device for Optical Disc Replay System Download PDF

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Publication number
KR970002931A
KR970002931A KR1019950018733A KR19950018733A KR970002931A KR 970002931 A KR970002931 A KR 970002931A KR 1019950018733 A KR1019950018733 A KR 1019950018733A KR 19950018733 A KR19950018733 A KR 19950018733A KR 970002931 A KR970002931 A KR 970002931A
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KR
South Korea
Prior art keywords
signal
output
tzc
detecting
level
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Application number
KR1019950018733A
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Korean (ko)
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KR0161911B1 (en
Inventor
정성갑
Original Assignee
구자홍
Lg 전자 주식회사
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Application filed by 구자홍, Lg 전자 주식회사 filed Critical 구자홍
Priority to KR1019950018733A priority Critical patent/KR0161911B1/en
Publication of KR970002931A publication Critical patent/KR970002931A/en
Application granted granted Critical
Publication of KR0161911B1 publication Critical patent/KR0161911B1/en

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Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B21/00—Head arrangements not specific to the method of recording or reproducing
    • G11B21/02—Driving or moving of heads
    • G11B21/08—Track changing or selecting during transducing operation
    • G11B21/081—Access to indexed tracks or parts of continuous track
    • G11B21/083—Access to indexed tracks or parts of continuous track on discs
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B21/00—Head arrangements not specific to the method of recording or reproducing
    • G11B21/16—Supporting the heads; Supporting the sockets for plug-in heads
    • G11B21/22—Supporting the heads; Supporting the sockets for plug-in heads while the head is out of operative position

Landscapes

  • Moving Of The Head For Recording And Reproducing By Optical Means (AREA)

Abstract

본 발명은 트랙 점프 후에 발생하는 트래킹 액츄에이터의 미끄러짐을 방지하도록 한 광디스크 재생 시스템의 브레이크장치에 관한 것이다.The present invention relates to a brake apparatus of an optical disc reproducing system which prevents slipping of a tracking actuator occurring after a track jump.

본 발명은 종래 TZC(Track Zero Crossing)의 타임 딜레이나 브레이크 신호와 액츄에이터 구동신호 사이의 타임 딜레이가 보상되지 않아 브레이크 기능이 저하되던 점을 감안하여 입력되는 RF신호의 엔벨로프를 검출하는 엔벨로프 검출부, 상기 엔벨로프 검출부의 출력으로부터 미러신호를 만드는 파형 정형부, 입력되는 트래킹 에러신호를 비교레벨과 비교하여 펄스폭이 가변되는 TZC신호를 발생하는 레벨 검출부, 상기 레벨 검출부의 출력신호의 에지를 검출하는 에지 검출부, 상기 파형 정형부의 출력을 상기 에지 검출부의 출력으로 래치하여 브레이크 신호를 발생하는 D플립플롭, 상기 파형정형부 및 레벨 검출부로부터의 미러신호와 TZC신호를 이용하여 트랙점프방향을 검출하여 상기 레벨 검출부로부터 출력되는 TZC신호의 펄스폭이 제어되도록 하는 점프 방향 검출부를 구비하여 트랙 점프 방향을 감지하여 점프방향에 따라 TZC신호의 타임 딜레이 및 브레이크 신호와 액츄에이터 구동신호와의 타임 딜레이를 보상함으로써 액츄에이터 구동신호중 미끄러지게 하는 성분을 제거할 수 있게 되어 브레이크의 효율을 향상시킬 수 있도록 한 것이다.The present invention is an envelope detecting unit for detecting the envelope of the RF signal input in consideration of the fact that the time delay of the TZC (Track Zero Crossing) or the time delay between the brake signal and the actuator drive signal is not compensated, the brake function is reduced. Waveform shaping unit for making mirror signal from output of envelope detector, Level detection unit for generating TZC signal with variable pulse width by comparing input tracking error signal with comparison level, Edge detector for detecting edge of output signal of level detection unit And latching the output of the waveform shaping section to the output of the edge detecting section to generate a brake signal. The track jump direction is detected using a mirror signal and a TZC signal from the waveform shaping section and the level detecting section. To control the pulse width of the TZC signal output from By detecting the track jump direction with the direction detecting unit, compensation of the time delay of the TZC signal and the time delay of the brake signal and the actuator driving signal according to the jumping direction can be eliminated to remove the sliding component of the actuator driving signal. To improve it.

Description

광디스크 재생 시스템의 브레이크장치Brake Device for Optical Disc Replay System

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

제4도는 본 발명에 따른 브레이크장치의 블럭 구성도.4 is a block diagram of a brake device according to the present invention.

Claims (4)

입력되는 RF신호의 엔벨로프를 검출하는 엔벨로프 검출부와, 상기 엔벨로프 검출부의 출력으로부터 미러신호를 만드는 파형 정형부와, 입력되는 트래킹 에러신호를 비교레벨과 비교하여 펄스폭이 가변되는 TZC신호를 발생하는 레벨 검출부와, 상기 파형정형부 및 레벨 검출부로부터의 미러신호와 TZC신호를 이용하여 트랙 점프방향을 검출하여 상기 레벨 검출부로부터 출력되는 TZC신호의 펄스폭이 제어되도록 하는 점프 방향 검출부와, 상기 레벨 검출부의 출력신호의 에지를 검출하는 에지 검출부와, 상기 파형 정형부의 출력을 상기 에지 검출부의 출력으로 래치하여 상기 레벨 검출부의 TZC신호출력에 따라 펄스폭이 가변되는 브레이크 신호를 발생하는 D플립 플롭을 구비함을 특징으로 하는 광디스크 재생 시스템의 브레이크 장치.An envelope detecting unit for detecting the envelope of the input RF signal, a waveform shaping unit for making a mirror signal from the output of the envelope detecting unit, and a tracking error signal input to a comparison level with a comparison level to generate a TZC signal having a variable pulse width. A detector, a jump direction detector for detecting a track jump direction using a mirror signal and a TZC signal from the waveform shaping unit and the level detector to control the pulse width of the TZC signal output from the level detector, and the level detector An edge detector for detecting an edge of an output signal, and a D flip flop for latching an output of the waveform shaping portion to an output of the edge detector to generate a brake signal having a pulse width varying according to the TZC signal output of the level detector. Brake apparatus of the optical disc playback system, characterized in that. 제1항에 있어서, 상기 레벨 검출부는 상기 점프 방향 검출부의 방향신호에 따라 내주에서 외주로 트랙점프시와 외주에서 내주로 트랙점프시의 비교레벨을 선택하기 위한 멀티플렉서와, 상기 멀티플렉서에 의해 선택된 비교레벨과 입력되는 트래킹 에러신호를 비교하여 비교레벨에 따른 TZC신호를 발생하는 비교기로 구성됨을 특징으로 하는 광디스크 재생 시스템의 브레이크장치.The multiplexer according to claim 1, wherein the level detector is configured to select a comparison level between the track jump from the inner circumference to the outer track and the track jump from the outer circumference to the inner circumference according to the direction signal of the jump direction detection unit, and a comparison selected by the multiplexer. And a comparator for comparing a level and an input tracking error signal to generate a TZC signal according to a comparison level. 제1항에 있어서, 상기 레벨 검출부는 상기 점프 방향 검출부로부터의 방향신호에 따라 스위칭되는 스위치와, 상기 스위치의 스위칭에 따라 내주에서 외주로 트랙점프시와 외주에서 내주로 트랙점프시 TZC를 위한 비교전압을 발생하는 비교전압 발생부와, 입력되는 트래킹 에러신호로부터 상기 비교전압 발생부의 출력에 따른 TZC신호를 발생하는 비교기로 구성됨을 특징으로 하는 광디스크 재생 시스템의 브레이크 장치.The TZC of claim 1, wherein the level detector is switched according to a direction signal from the jump direction detector, and when the track is jumped from the inner circumference to the outer circumference and the track circumference from the outer circumference according to the switching of the switch. And a comparator for generating a voltage and a comparator for generating a TZC signal according to an output of the comparison voltage generator from an input tracking error signal. 제3항에 있어서, 상기 비교전압 발생부는 상기 비교기의 비반전 입력단에 애노드단이 접속되어 상기 스위치의 스위칭에 따라 내주에서 외주로 트랙점프시 비교전압을 발생하는 제1다이오드와, 상기 비교기의 비반전 입력단에 캐소드단이 접속되어 외주에서 내주로 트랙점프시 비교전압을 발생하는 제2다이오드를 구비함을 특징으로 하는 광디스크 재생 시스템의 브레이크 장치.4. The method of claim 3, wherein the comparison voltage generator comprises an anode terminal connected to a non-inverting input terminal of the comparator and generating a comparison voltage when the track jumps from the inner circumference to the outer circumference according to the switching of the switch, and the ratio of the comparator. And a second diode connected to the inverting input terminal, the second diode generating a comparison voltage during the track jump from the outer circumference to the inner circumference. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019950018733A 1995-06-30 1995-06-30 Brake device and method for recording medium reproducing system KR0161911B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019950018733A KR0161911B1 (en) 1995-06-30 1995-06-30 Brake device and method for recording medium reproducing system

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Application Number Priority Date Filing Date Title
KR1019950018733A KR0161911B1 (en) 1995-06-30 1995-06-30 Brake device and method for recording medium reproducing system

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Publication Number Publication Date
KR970002931A true KR970002931A (en) 1997-01-28
KR0161911B1 KR0161911B1 (en) 1998-12-15

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KR1019950018733A KR0161911B1 (en) 1995-06-30 1995-06-30 Brake device and method for recording medium reproducing system

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100382735B1 (en) * 2001-02-28 2003-05-09 삼성전자주식회사 Lens brake driving device for reducing access time
KR100425465B1 (en) * 2001-09-27 2004-03-30 삼성전자주식회사 Brake signal generating circuit for improving ability for lens brake in optical disk reproducing system and method thereof

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100475035B1 (en) * 1998-06-22 2005-05-27 삼성전자주식회사 Direction detection signal generator and track jump method
KR100617209B1 (en) * 1999-07-16 2006-08-31 엘지전자 주식회사 Optical record/player and track jump method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100382735B1 (en) * 2001-02-28 2003-05-09 삼성전자주식회사 Lens brake driving device for reducing access time
KR100425465B1 (en) * 2001-09-27 2004-03-30 삼성전자주식회사 Brake signal generating circuit for improving ability for lens brake in optical disk reproducing system and method thereof

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Publication number Publication date
KR0161911B1 (en) 1998-12-15

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