JPS63237225A - Optical disk device - Google Patents

Optical disk device

Info

Publication number
JPS63237225A
JPS63237225A JP7064787A JP7064787A JPS63237225A JP S63237225 A JPS63237225 A JP S63237225A JP 7064787 A JP7064787 A JP 7064787A JP 7064787 A JP7064787 A JP 7064787A JP S63237225 A JPS63237225 A JP S63237225A
Authority
JP
Grant status
Application
Patent type
Prior art keywords
inputted
signal
level value
tracking error
error signal
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
JP7064787A
Inventor
Yasuhiro Goto
Toshio Sato
Masayuki Shibano
Shinichi Yamada
Original Assignee
Matsushita Electric Ind 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

Links

Abstract

PURPOSE: To stably and precisely execute tracing by holding an erase light spot position control means with a level value under the second level value of an erase tracking error signal or more than the level value which has been set in a recording light tracking error signal.
CONSTITUTION: The recording/reproducing light tracking error signal 28 controls a current flowing in a tracking position control coil 33. If the erase light tracking error signal 36 exceeds a first level, a control ON signal 51 is inputted from a comparator 55 to a CPU56, which controls the current which is made to flow to an erase light spot position control coil 41. If the signal 28 has the level more than the prescribe level value, it is decided in a comparator 49 and is inputted to an OR circuit 58. If a shift command is inputted to an impression terminal 31, the signal is also inputted to the circuit. If the signal 36 becomes smaller than the second level value 52, holding signals are outputted from a comparator 54. They are inputted to the CPU56 through the circuit 58 as the holding signals 50, and the current flowing in the coil 41 is held.
COPYRIGHT: (C)1988,JPO&Japio
JP7064787A 1987-03-25 1987-03-25 Optical disk device Pending JPS63237225A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7064787A JPS63237225A (en) 1987-03-25 1987-03-25 Optical disk device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7064787A JPS63237225A (en) 1987-03-25 1987-03-25 Optical disk device

Publications (1)

Publication Number Publication Date
JPS63237225A true true JPS63237225A (en) 1988-10-03

Family

ID=13437651

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7064787A Pending JPS63237225A (en) 1987-03-25 1987-03-25 Optical disk device

Country Status (1)

Country Link
JP (1) JPS63237225A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5130967A (en) * 1989-05-01 1992-07-14 Pioneer Electronic Corporation On/off-track detecting apparatus for compatible disk player

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5130967A (en) * 1989-05-01 1992-07-14 Pioneer Electronic Corporation On/off-track detecting apparatus for compatible disk player

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