JPS57191840A - Track follow-up controller - Google Patents

Track follow-up controller

Info

Publication number
JPS57191840A
JPS57191840A JP7739181A JP7739181A JPS57191840A JP S57191840 A JPS57191840 A JP S57191840A JP 7739181 A JP7739181 A JP 7739181A JP 7739181 A JP7739181 A JP 7739181A JP S57191840 A JPS57191840 A JP S57191840A
Authority
JP
Japan
Prior art keywords
servo
signal
mirror
circuit
servo loop
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
JP7739181A
Other languages
Japanese (ja)
Other versions
JPS6224856B2 (en
Inventor
Kazuo Okada
Fumiaki Kondo
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric 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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP7739181A priority Critical patent/JPS57191840A/en
Publication of JPS57191840A publication Critical patent/JPS57191840A/en
Publication of JPS6224856B2 publication Critical patent/JPS6224856B2/ja
Granted 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 speed up servo control by composing a cascade control system of a main and a minor servo loop in combination. CONSTITUTION:When the position deviation signal r(S) of a light spot 7 from a signal processing circuit 11 is supplied to a servo circuit 46, it is multiplied by a factor K2 at a part 42 and by a factor K1 at a part 45, and the resulting signals are added at a part 43, whose output is supplied to an actuator 5 to rotate a mirror 4, exercising tracking control over a main servo loop. A converter 44, on the other hand, outputs a deviation signal C(S) according to the rotation of the mirror 4, and supplies it to the amplifier 41 of a circuit 46. Consequently, a minor servo loop is formed by the difference signal between the signals r(S) and C(S). Therefore, the rotation of the mirror varies the relative relation between the light spot 7 and a track 9 to correct the signal r(S), exercising high-speed servo control.
JP7739181A 1981-05-20 1981-05-20 Track follow-up controller Granted JPS57191840A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7739181A JPS57191840A (en) 1981-05-20 1981-05-20 Track follow-up controller

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7739181A JPS57191840A (en) 1981-05-20 1981-05-20 Track follow-up controller

Publications (2)

Publication Number Publication Date
JPS57191840A true JPS57191840A (en) 1982-11-25
JPS6224856B2 JPS6224856B2 (en) 1987-05-30

Family

ID=13632588

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7739181A Granted JPS57191840A (en) 1981-05-20 1981-05-20 Track follow-up controller

Country Status (1)

Country Link
JP (1) JPS57191840A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58159248A (en) * 1982-03-17 1983-09-21 Fujitsu Ltd Tracking servo system of optical disc device
WO1984003387A1 (en) * 1983-02-22 1984-08-30 Matsushita Electric Ind Co Ltd Apparatus for controlling tracking of recorded disc reproduction device
JPS6015839A (en) * 1983-07-05 1985-01-26 Matsushita Electric Ind Co Ltd Optical recording and reproducing device
JPS6026621U (en) * 1983-07-28 1985-02-22 アルプス電気株式会社 Optical head position control device
JPS6066334A (en) * 1983-09-20 1985-04-16 Nippon Columbia Co Ltd Servo device of optical pickup
JPH11185413A (en) * 1997-12-22 1999-07-09 Fujitsu Ltd Tracking control apparatus

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5146018A (en) * 1974-10-18 1976-04-20 Victor Company Of Japan

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5146018A (en) * 1974-10-18 1976-04-20 Victor Company Of Japan

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58159248A (en) * 1982-03-17 1983-09-21 Fujitsu Ltd Tracking servo system of optical disc device
JPS63858B2 (en) * 1982-03-17 1988-01-08 Fujitsu Ltd
WO1984003387A1 (en) * 1983-02-22 1984-08-30 Matsushita Electric Ind Co Ltd Apparatus for controlling tracking of recorded disc reproduction device
US4799206A (en) * 1983-02-22 1989-01-17 Matsushita Electric Industrial Co., Ltd. Tracking control apparatus for recording disc reproducing apparatus
JPS6015839A (en) * 1983-07-05 1985-01-26 Matsushita Electric Ind Co Ltd Optical recording and reproducing device
JPH0320818B2 (en) * 1983-07-05 1991-03-20 Matsushita Electric Ind Co Ltd
JPS6026621U (en) * 1983-07-28 1985-02-22 アルプス電気株式会社 Optical head position control device
JPS6066334A (en) * 1983-09-20 1985-04-16 Nippon Columbia Co Ltd Servo device of optical pickup
JPH0250533B2 (en) * 1983-09-20 1990-11-02 Nippon Columbia
JPH11185413A (en) * 1997-12-22 1999-07-09 Fujitsu Ltd Tracking control apparatus

Also Published As

Publication number Publication date
JPS6224856B2 (en) 1987-05-30

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