JPS5641533A - Regenerative device - Google Patents

Regenerative device

Info

Publication number
JPS5641533A
JPS5641533A JP11478079A JP11478079A JPS5641533A JP S5641533 A JPS5641533 A JP S5641533A JP 11478079 A JP11478079 A JP 11478079A JP 11478079 A JP11478079 A JP 11478079A JP S5641533 A JPS5641533 A JP S5641533A
Authority
JP
Japan
Prior art keywords
circuits
control
outputs
tracking
gain
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
JP11478079A
Other languages
Japanese (ja)
Other versions
JPS6313264B2 (en
Inventor
Mitsuro Moriya
Masahiro Deguchi
Noboru Wakami
Yasuhiro Goto
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 JP11478079A priority Critical patent/JPS5641533A/en
Publication of JPS5641533A publication Critical patent/JPS5641533A/en
Publication of JPS6313264B2 publication Critical patent/JPS6313264B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
    • G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G11B7/095—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following specially adapted for discs, e.g. for compensation of eccentricity or wobble

Abstract

PURPOSE:To stably control the tracking in the whole recording area, by changing the control gain of the scanning and moving means according to a signal of the scanning position detecting means by which the position in the radial direction of the recording disk is detected. CONSTITUTION:The outputs of the optical detectors 10', 10'' are provided to the gain control circuits 51, 51', respectively, and these outputs are provided to the envelope detection circuits 52, 52'. The difference of outputs of the circuits 52, 52' is obtained by the differential amplifier 11, and the tracking control is performed by driving all reflectors through the driving circuit 13. The circuits 51, 51' control the gain by the output of the position detector 14 so that the respective signal outputs of the optical detectors 10', 10'' can be always constant, regardless of the radial position of the recording disk. Accordingly, the inputs of the circuits 52, 52' become constant at all times, and even in case of detecting with a diode, the influence of characteristics of the diode is removed. Therefore, the tracking can be controlled stably in the whole recording area of the disk.
JP11478079A 1979-09-06 1979-09-06 Regenerative device Granted JPS5641533A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11478079A JPS5641533A (en) 1979-09-06 1979-09-06 Regenerative device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11478079A JPS5641533A (en) 1979-09-06 1979-09-06 Regenerative device

Publications (2)

Publication Number Publication Date
JPS5641533A true JPS5641533A (en) 1981-04-18
JPS6313264B2 JPS6313264B2 (en) 1988-03-24

Family

ID=14646489

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11478079A Granted JPS5641533A (en) 1979-09-06 1979-09-06 Regenerative device

Country Status (1)

Country Link
JP (1) JPS5641533A (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5677062U (en) * 1979-11-17 1981-06-23
JPS6031728U (en) * 1983-08-04 1985-03-04 株式会社ケンウッド Tracking servo device
JPS61160072A (en) * 1985-01-08 1986-07-19 Hitachi Electronics Eng Co Ltd Apparatus for inspecting disc shaped recording medium
JPS61214286A (en) * 1985-03-20 1986-09-24 Fuji Photo Film Co Ltd Rotating magnetic recording body tracking device
JPS61222074A (en) * 1985-03-28 1986-10-02 Tokyo Electric Co Ltd Auto-tracking device in disk device
JPS62159383A (en) * 1986-01-08 1987-07-15 Asahi Optical Co Ltd Tracking device for rotary magnetic recording medium
JPS62243131A (en) * 1986-04-15 1987-10-23 Pioneer Electronic Corp Informartion reader
JPH01107327A (en) * 1987-10-21 1989-04-25 Canon Inc Optical information recording and reproducing device
JPH04219634A (en) * 1991-04-12 1992-08-10 Hitachi Ltd Optical track tracking device
US5384762A (en) * 1990-09-27 1995-01-24 International Business Machines Corporation Focusing servo in an optical disk drive

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS616452A (en) * 1984-06-20 1986-01-13 Toyota Motor Corp Controller for continuously variable transmission for car

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS616452A (en) * 1984-06-20 1986-01-13 Toyota Motor Corp Controller for continuously variable transmission for car

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS626580Y2 (en) * 1979-11-17 1987-02-16
JPS5677062U (en) * 1979-11-17 1981-06-23
JPS6031728U (en) * 1983-08-04 1985-03-04 株式会社ケンウッド Tracking servo device
JPH0516653Y2 (en) * 1983-08-04 1993-05-06
JPS61160072A (en) * 1985-01-08 1986-07-19 Hitachi Electronics Eng Co Ltd Apparatus for inspecting disc shaped recording medium
JP2552106B2 (en) * 1985-01-08 1996-11-06 日立電子エンジニアリング 株式会社 Disk type recording medium inspection device
JPS61214286A (en) * 1985-03-20 1986-09-24 Fuji Photo Film Co Ltd Rotating magnetic recording body tracking device
JPS61222074A (en) * 1985-03-28 1986-10-02 Tokyo Electric Co Ltd Auto-tracking device in disk device
JPH0520830B2 (en) * 1985-03-28 1993-03-22 Tokyo Electric Co Ltd
JPS62159383A (en) * 1986-01-08 1987-07-15 Asahi Optical Co Ltd Tracking device for rotary magnetic recording medium
JPH077523B2 (en) * 1986-04-15 1995-01-30 パイオニア株式会社 Information reader
JPS62243131A (en) * 1986-04-15 1987-10-23 Pioneer Electronic Corp Informartion reader
JPH01107327A (en) * 1987-10-21 1989-04-25 Canon Inc Optical information recording and reproducing device
US5384762A (en) * 1990-09-27 1995-01-24 International Business Machines Corporation Focusing servo in an optical disk drive
JPH04219634A (en) * 1991-04-12 1992-08-10 Hitachi Ltd Optical track tracking device
JP2591344B2 (en) * 1991-04-12 1997-03-19 株式会社日立製作所 Optical track tracker

Also Published As

Publication number Publication date
JPS6313264B2 (en) 1988-03-24

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