KR970017404A - Track Error Reduction Device in Optical Disc System - Google Patents

Track Error Reduction Device in Optical Disc System Download PDF

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Publication number
KR970017404A
KR970017404A KR1019950031505A KR19950031505A KR970017404A KR 970017404 A KR970017404 A KR 970017404A KR 1019950031505 A KR1019950031505 A KR 1019950031505A KR 19950031505 A KR19950031505 A KR 19950031505A KR 970017404 A KR970017404 A KR 970017404A
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KR
South Korea
Prior art keywords
output
gain
eccentricity
signal
amplifier
Prior art date
Application number
KR1019950031505A
Other languages
Korean (ko)
Other versions
KR100230248B1 (en
Inventor
류재춘
정수열
Original Assignee
김광호
삼성전자 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by 김광호, 삼성전자 주식회사 filed Critical 김광호
Priority to KR1019950031505A priority Critical patent/KR100230248B1/en
Publication of KR970017404A publication Critical patent/KR970017404A/en
Application granted granted Critical
Publication of KR100230248B1 publication Critical patent/KR100230248B1/en

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    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B20/10009—Improvement or modification of read or write signals
    • G11B20/10018—Improvement or modification of read or write signals analog processing for digital recording or reproduction
    • G11B20/10027—Improvement or modification of read or write signals analog processing for digital recording or reproduction adjusting the signal strength during recording or reproduction, e.g. variable gain amplifiers
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B20/10009—Improvement or modification of read or write signals
    • G11B20/10046—Improvement or modification of read or write signals filtering or equalising, e.g. setting the tap weights of an FIR filter

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Optical Recording Or Reproduction (AREA)

Abstract

본 발명은 광디스크 시스템에서의 트랙 에러 저감 장치에 관한 것으로, 특히 광디스크 시스템에서 편심에 의해 생기는 저주파 성분의 트랙 에러 신호를 줄이는 장치에 관한 것이다. 본 발명의 목적을 위하여 수광기 및 전류-전압 증폭기로부터 출력되는 편심에 의한 에러의 특정 대역을 추출하는 밴드 패스 필터기, 밴드 패스 필터기에서 출력되는 특정대역의 이득을 증폭시키는 제2이득 증폭기, 제2이득 증폭기에서 출력되는 신호와 상기 보상기에서의 출력 신호를 합하는 가산기를 포함하는 것을 특징으로 한다. 본 발명에 의하면 디스크 편심량이 영향을 미치는 주파수 대역만 선택하여 별도로 적절한 이득을 선정하여 가산 해 중으로서 편심랑이 큰 경우에도 저주파 에러를 방지할 수 있고 이로 인해 고주파(RF)신호의 지터 현상을 개선하여 높은 C/N비를 얻을 수 있고 보다 선명한 아이 패턴을 얻을 수 있는 잇점이 있다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a track error reduction apparatus in an optical disc system, and more particularly, to an apparatus for reducing a track error signal of low frequency components caused by eccentricity in an optical disc system. A band pass filter for extracting a specific band of error due to eccentricity output from the light receiver and the current-voltage amplifier for the purpose of the present invention, a second gain amplifier for amplifying the gain of the specific band output from the band pass filter, And an adder for adding the signal output from the second gain amplifier and the output signal from the compensator. According to the present invention, it is possible to prevent low frequency error even when the eccentricity is large by selecting an appropriate gain separately by selecting only a frequency band in which the disk eccentricity affects, thereby improving jitter of a high frequency (RF) signal. There is an advantage in that a high C / N ratio can be obtained and a clearer eye pattern can be obtained.

Description

광디스크 시스템에서의 트랙 에러 저감 장치Track Error Reduction Device in Optical Disc System

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

제3도는 본 발명의 광디스크 시스템에서의 트랙 에러 저감 장치를 적용한 트랙킹 제어 장치의 블럭도,3 is a block diagram of a tracking control device to which a track error reduction device in the optical disk system of the present invention is applied;

제4도는 제3도의 상세 회로도,4 is a detailed circuit diagram of FIG.

제6도는 본 발명을 적용했을 때의 트랙킹시 트랙 에러 신호 파형도(a)와 구동기 출력 신호 파형도(b).6 is a track error signal waveform diagram (a) and a driver output signal waveform diagram (b) during tracking when the present invention is applied.

Claims (1)

외부 충격이나 편심등에 의한 디스크 변위와 액츄에이터의 위치 차이에 의한 에러 량을 전류 신호로 변환시키고 이를 전압의 형태로 변환시키는 수광기 및 전류-전압 증폭기와, 상기 수광기 및 전류-전압 증폭기에 의해 출력된 전압 이득을 증폭시키는 제1이득 증폭기와, 상기 이득 증폭기에서의 출력에 위상 마진을 주는 보상기와 상기 보상기에서 출력되는 출력 신호에 의해 픽업을 구동시키는 구동기 및 액츄에이터를 구비한 광디스크 시스템에서의 트랙 에러 저감 장치에 있어서, 상기 수광기 및 전류-전압 증폭기로부터 출력되는 편심에 의한 에러의 특정 주파수 대역을 추출하는 밴드 패스 필터기; 상기 밴드 패스 필터기에서 출력되는 특정 주파수 대역의 이득을 증폭시키는 제2이득 증폭기, 상기 제2이득 증폭기에서 출력된 신호와 상기 보상기에서의 출력신호를 합하는 가산기를 포함하는 것을 특징으로 하는 광디스크 시스템에서의 트랙 에러 저감 장치.A light receiver and a current-voltage amplifier which converts an error amount due to a disc displacement and an actuator position difference due to an external shock or an eccentricity into a current signal and converts it into a voltage form, and is output by the light receiver and the current-voltage amplifier Track error in an optical disc system having a first gain amplifier for amplifying the gained voltage gain, a compensator for giving a phase margin to the output from the gain amplifier, and a driver and actuator for driving the pickup by an output signal output from the compensator An abatement apparatus, comprising: a band pass filter for extracting a specific frequency band of an error due to an eccentricity output from the light receiver and a current-voltage amplifier; And a second gain amplifier for amplifying a gain of a specific frequency band output from the band pass filter, and an adder for adding the signal output from the second gain amplifier and the output signal from the compensator. Track error reduction device. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019950031505A 1995-09-21 1995-09-21 Track error device in optical disk system KR100230248B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019950031505A KR100230248B1 (en) 1995-09-21 1995-09-21 Track error device in optical disk system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019950031505A KR100230248B1 (en) 1995-09-21 1995-09-21 Track error device in optical disk system

Publications (2)

Publication Number Publication Date
KR970017404A true KR970017404A (en) 1997-04-30
KR100230248B1 KR100230248B1 (en) 1999-11-15

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ID=19427646

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019950031505A KR100230248B1 (en) 1995-09-21 1995-09-21 Track error device in optical disk system

Country Status (1)

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KR (1) KR100230248B1 (en)

Also Published As

Publication number Publication date
KR100230248B1 (en) 1999-11-15

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