JPH01220229A - Gain controller for focusing servo - Google Patents

Gain controller for focusing servo

Info

Publication number
JPH01220229A
JPH01220229A JP4622088A JP4622088A JPH01220229A JP H01220229 A JPH01220229 A JP H01220229A JP 4622088 A JP4622088 A JP 4622088A JP 4622088 A JP4622088 A JP 4622088A JP H01220229 A JPH01220229 A JP H01220229A
Authority
JP
Japan
Prior art keywords
focusing servo
level
error signal
impressed
disturbance
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.)
Granted
Application number
JP4622088A
Other languages
Japanese (ja)
Other versions
JP2718053B2 (en
Inventor
Kenichi Koyama
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP63046220A priority Critical patent/JP2718053B2/en
Publication of JPH01220229A publication Critical patent/JPH01220229A/en
Application granted granted Critical
Publication of JP2718053B2 publication Critical patent/JP2718053B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Abstract

PURPOSE: To stably adjust the gain of focusing servo by providing a means to detect the level of a focusing servo error signal, and a means to control the level of disturbance to be impressed by the level of the focusing servo error signal.
CONSTITUTION: The title device is provided with the means 30 to detect the focus error signal in the open state of a focusing servo loop, and the means 20 to control the level of the disturbance to be impressed by the level of the focus error signal. And by setting the level of the disturbance to be impressed on the focusing servo loop at an appropriate level, correct gain control can be performed not depending on the optical dispersion of a disk or an optical pickup. In such a way, it is possible to obtain a gain controller for the focusing servo for an optical disk player in which gain control can be performed stably not depending on the optical dispersion of the disk or the optical pickup.
COPYRIGHT: (C)1989,JPO&Japio
JP63046220A 1988-02-29 1988-02-29 Focus servo gain adjustment device Expired - Lifetime JP2718053B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP63046220A JP2718053B2 (en) 1988-02-29 1988-02-29 Focus servo gain adjustment device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP63046220A JP2718053B2 (en) 1988-02-29 1988-02-29 Focus servo gain adjustment device

Publications (2)

Publication Number Publication Date
JPH01220229A true JPH01220229A (en) 1989-09-01
JP2718053B2 JP2718053B2 (en) 1998-02-25

Family

ID=12741026

Family Applications (1)

Application Number Title Priority Date Filing Date
JP63046220A Expired - Lifetime JP2718053B2 (en) 1988-02-29 1988-02-29 Focus servo gain adjustment device

Country Status (1)

Country Link
JP (1) JP2718053B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05151589A (en) * 1991-11-29 1993-06-18 Matsushita Electric Ind Co Ltd Focus control device

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62264442A (en) * 1986-05-12 1987-11-17 Olympus Optical Co Ltd Loop gain measuring instrument

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62264442A (en) * 1986-05-12 1987-11-17 Olympus Optical Co Ltd Loop gain measuring instrument

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05151589A (en) * 1991-11-29 1993-06-18 Matsushita Electric Ind Co Ltd Focus control device

Also Published As

Publication number Publication date
JP2718053B2 (en) 1998-02-25

Similar Documents

Publication Publication Date Title
JPS61177642A (en) Optical information recording and reproducing device
JPS60247833A (en) Tracking servocontrol device for optical disk player
JPS59157854A (en) Controller of optical disk player
JPH03173935A (en) Servo device for optical disk
JPH01220229A (en) Gain controller for focusing servo
JPH01173324A (en) Information processor
JPS61292227A (en) Optical disc device
JPH04265532A (en) Optical information recording and reproducng device
JPH01220231A (en) Gain controller for tracking servo
JPS62277636A (en) Method and device for signal level correction of focus error signal
JPH03288359A (en) Recording medium driving device control method and recording medium driving device
JPS61107542A (en) Optical disc reproducing device
JPS6252735A (en) Optical information recording and reproducing device
JPH01241026A (en) Optical disk player
JPS58164016A (en) Automatic adjusting device of azimuth angle of magnetic head
JPH0266736A (en) Feed servo circuit for optical disk device
JPH0442443A (en) Focusing servo circuit for optical recording and reproducing device
JPH0344830A (en) Focusing controller
JPS6387622A (en) Servo circuit for optical disk recording and reproducing device
JPH0283704A (en) Automatic loop gain control circuit
JPH04345920A (en) Optical disk device
JPS61260429A (en) Optical information recording and reproducing device
JPH04176026A (en) Automatic adjustor
JPH0253226A (en) Optical reproducing device
JPH04252434A (en) Optical disk device

Legal Events

Date Code Title Description
FPAY Renewal fee payment (prs date is renewal date of database)

Free format text: PAYMENT UNTIL: 20071114

Year of fee payment: 10

FPAY Renewal fee payment (prs date is renewal date of database)

Free format text: PAYMENT UNTIL: 20081114

Year of fee payment: 11

EXPY Cancellation because of completion of term
FPAY Renewal fee payment (prs date is renewal date of database)

Year of fee payment: 11

Free format text: PAYMENT UNTIL: 20081114