KR930014346A - Focusing Circuit of Optical Disc Device - Google Patents

Focusing Circuit of Optical Disc Device Download PDF

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Publication number
KR930014346A
KR930014346A KR1019910025043A KR910025043A KR930014346A KR 930014346 A KR930014346 A KR 930014346A KR 1019910025043 A KR1019910025043 A KR 1019910025043A KR 910025043 A KR910025043 A KR 910025043A KR 930014346 A KR930014346 A KR 930014346A
Authority
KR
South Korea
Prior art keywords
focusing
focusing circuit
optical disc
circuit
focus
Prior art date
Application number
KR1019910025043A
Other languages
Korean (ko)
Inventor
고의석
Original Assignee
백중영
금성통신 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.)
Filing date
Publication date
Application filed by 백중영, 금성통신 주식회사 filed Critical 백중영
Priority to KR1019910025043A priority Critical patent/KR930014346A/en
Publication of KR930014346A publication Critical patent/KR930014346A/en

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

Abstract

본 발명은 광학디스크장치의 포커싱회로와 관련된 것으로서, 종래의 이러한 포커싱회로에서 포커스점을 탐색하여 포커싱시킴으로써 대물렌즈의 자유상태위치와 포커싱위치사이와의 차이에서 오는 복원력으로 포커스루프의 DC적이득부담을 주게되거나 또는 포커스루프구동이후 포커싱이 제대로 안되었을 경우 재차 동작을 반복하여야 하는 불편이 있었다.The present invention relates to a focusing circuit of an optical disc apparatus, wherein by focusing by searching for and focusing a focus point in the conventional focusing circuit, the DC gain burden of the focus loop with a restoring force resulting from the difference between the free state position and the focusing position of the objective lens is achieved. Or if focusing is not done properly after focus loop driving, it was inconvenient to repeat the operation again.

그러나, 본 발명은 상기와 같은 문제점을 개선할 수 있도록 포커싱회로에 사용되는 파형발생기 대신에 DA컨버터데이타가 가해지는 DA컨버터(1)를 구비시킨 구성의 포커싱회로를 제공하는데 있다.However, the present invention provides a focusing circuit having a DA converter 1 to which DA converter data is applied instead of a waveform generator used in the focusing circuit so as to improve the above problems.

Description

광디스크장치의 포커싱회로Focusing Circuit of Optical Disc Device

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음As this is a public information case, the full text was not included.

제2도는 제1도와 관련하여 포커싱전압의 합신호 및 차신호상태를 나타내는 참고도.2 is a reference diagram showing a sum signal and a difference signal state of a focusing voltage in relation to FIG.

제4도는 제3도에서 포커스 위치검출상태를 나타내는 참고도.4 is a reference diagram showing a focus position detection state in FIG.

제5도는 제3도의 각부 파형도.5 is a waveform diagram of each part of FIG.

Claims (1)

포커스탐색온신호(FSO)단이 이어진 아날로그스위치(SW2)와 증폭기를 갖는 포커스코일(22) 사이에는 가변되는 DA컨버터데이타(CD)가 입력되어 포커스용 코일(22)을 구동하는 DA컨버터(1)가 구비된 구성을 특징으로 하는 광학디스크 장치의 포커싱회로.Between the analog switch SW 2 connected to the focus search-on signal (FSO) stage and the focus coil 22 having the amplifier, a variable DA converter data CD is input to drive the focus coil 22. 1) A focusing circuit of an optical disc apparatus characterized by the configuration provided. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019910025043A 1991-12-30 1991-12-30 Focusing Circuit of Optical Disc Device KR930014346A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019910025043A KR930014346A (en) 1991-12-30 1991-12-30 Focusing Circuit of Optical Disc Device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019910025043A KR930014346A (en) 1991-12-30 1991-12-30 Focusing Circuit of Optical Disc Device

Publications (1)

Publication Number Publication Date
KR930014346A true KR930014346A (en) 1993-07-23

Family

ID=67346186

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019910025043A KR930014346A (en) 1991-12-30 1991-12-30 Focusing Circuit of Optical Disc Device

Country Status (1)

Country Link
KR (1) KR930014346A (en)

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