JPS648566A - Tracking servo device for optical disk device - Google Patents

Tracking servo device for optical disk device

Info

Publication number
JPS648566A
JPS648566A JP16422987A JP16422987A JPS648566A JP S648566 A JPS648566 A JP S648566A JP 16422987 A JP16422987 A JP 16422987A JP 16422987 A JP16422987 A JP 16422987A JP S648566 A JPS648566 A JP S648566A
Authority
JP
Japan
Prior art keywords
error signal
mean value
tracking error
flaw
eccentricity
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
JP16422987A
Other languages
Japanese (ja)
Inventor
Yasuya Tomimitsu
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
Original Assignee
NEC Corp
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 NEC Corp filed Critical NEC Corp
Priority to JP16422987A priority Critical patent/JPS648566A/en
Publication of JPS648566A publication Critical patent/JPS648566A/en
Pending legal-status Critical Current

Links

Landscapes

  • Moving Of The Head To Find And Align With The Track (AREA)
  • Optical Recording Or Reproduction (AREA)

Abstract

PURPOSE:To allow the titled device to withstand a flaw or shock by using a mean value of eccentricity as a reference so as to apply tracking servo control thereby obtaining a consecutive tracking error signal. CONSTITUTION:A mean value calculation circuit 43 calculates a means value as to plural tracks at the location of an identical rotary angle from a reference axis with respect to the eccentricity gamma stored in a RAM 31. A pseudo tracking error signal e' obtained from a subtraction circuit 38 receiving the obtained mean value and a present relative position signal (y) is given to a driver 71 via a loop filter 39 and a digital/analog converter (D/A) 40. Thus, the titled device copes with track jump due to flaw or shock sufficiently and no discontinuous point takes place in the tracking error signal and stable servo control is attained.
JP16422987A 1987-06-30 1987-06-30 Tracking servo device for optical disk device Pending JPS648566A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16422987A JPS648566A (en) 1987-06-30 1987-06-30 Tracking servo device for optical disk device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16422987A JPS648566A (en) 1987-06-30 1987-06-30 Tracking servo device for optical disk device

Publications (1)

Publication Number Publication Date
JPS648566A true JPS648566A (en) 1989-01-12

Family

ID=15789125

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16422987A Pending JPS648566A (en) 1987-06-30 1987-06-30 Tracking servo device for optical disk device

Country Status (1)

Country Link
JP (1) JPS648566A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7367337B2 (en) 2000-03-03 2008-05-06 Resmed Limited Adjustment of ventilator pressure-time profile to balance comfort and effectiveness

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7367337B2 (en) 2000-03-03 2008-05-06 Resmed Limited Adjustment of ventilator pressure-time profile to balance comfort and effectiveness

Similar Documents

Publication Publication Date Title
CA2013058A1 (en) Transducer positioning servo mechanisms employing digital and analog circuits
EP0094828A3 (en) Apparatus for indicating the position of a member
JPS5441114A (en) Automatic tracking system
JPS56101621A (en) Tracking system of magnetic reproducing device
TW363182B (en) Positioning apparatus for optical disks
JPS5417804A (en) Tone arm controller of record players
JPS648566A (en) Tracking servo device for optical disk device
JPS5398802A (en) Optical reproducer
JPS5280007A (en) Video disc
ATE50660T1 (en) DEVICE FOR PLAYBACK FROM A DISC-FORM RECORD.
JPS57120269A (en) Disk recording and reproducing device
JPS57181432A (en) Optical type disc reproducer
EP0394062A3 (en) Position control device for positioning magnetic head on selected track
EP0254279A3 (en) Rotary head type recording and/or reproducing apparatus
JPS53118012A (en) Automatic tracking device
JPS6466829A (en) Tracking device for optical disk device
JPS641169A (en) Optical disk device
JPS5387203A (en) Stabilizing system for rotary mirror in optical information recorder/reproducer
JPS53110502A (en) Record player
JPS5397324A (en) Recorded information reproducer
JPS5750323A (en) Video signal recording and reproducing device
JPS6430030A (en) Optical disk device
KR930014345A (en) Track jumping control method of optical disk device and system therefor
JPS544101A (en) Signal pickupdevice for reproducing system using rotary information recording medium
JPS57179939A (en) Tracking control system