JPS56145533A - Tracking control device in optical recording and reproducing device - Google Patents

Tracking control device in optical recording and reproducing device

Info

Publication number
JPS56145533A
JPS56145533A JP4971980A JP4971980A JPS56145533A JP S56145533 A JPS56145533 A JP S56145533A JP 4971980 A JP4971980 A JP 4971980A JP 4971980 A JP4971980 A JP 4971980A JP S56145533 A JPS56145533 A JP S56145533A
Authority
JP
Japan
Prior art keywords
reproducing
recording
amplifier
tracking
amplifiers
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
JP4971980A
Other languages
Japanese (ja)
Inventor
Shunji Harikae
Tomio Yoshida
Isao Sato
Kenji Koishi
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 JP4971980A priority Critical patent/JPS56145533A/en
Publication of JPS56145533A publication Critical patent/JPS56145533A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To obtain tracking controlling which is always stable and accurate in any state of recording, reproducing and erasing by changing the gains of amplifiers for tracking controlling at the recording and the reproducing. CONSTITUTION:The outputs of a pair of photodetectors enter a differential amplifier 16 via amplifiers 14, 15, and a tracking error signal is outputted therefrom. By way of an analogue switch 19, this error signal is inputted via an amplifier 17 of a gain G1 at the reproducing and an amplifier 1 of a gain G2 at the recording, to a driving circuit 22 of a tracking mirror by way of a phase compensating circuit 20 and an amplifier 21. The gains G1, G2 of the amplifiers 17, 18 are so selected as to satisfy P1XG1=P2XG2 when the quantities of the light receives in the photodetectors at the reproducing and recording are defined as P1, P2 respectively. Hence, the tracking controlling which is always stable and accurate in any state of recording, reproducing and erasing is obtained.
JP4971980A 1980-04-15 1980-04-15 Tracking control device in optical recording and reproducing device Pending JPS56145533A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4971980A JPS56145533A (en) 1980-04-15 1980-04-15 Tracking control device in optical recording and reproducing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4971980A JPS56145533A (en) 1980-04-15 1980-04-15 Tracking control device in optical recording and reproducing device

Publications (1)

Publication Number Publication Date
JPS56145533A true JPS56145533A (en) 1981-11-12

Family

ID=12838990

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4971980A Pending JPS56145533A (en) 1980-04-15 1980-04-15 Tracking control device in optical recording and reproducing device

Country Status (1)

Country Link
JP (1) JPS56145533A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5936335A (en) * 1982-08-24 1984-02-28 Matsushita Electric Ind Co Ltd Optical disk and its recording and reproducing method
JPS59144054A (en) * 1983-02-07 1984-08-17 Matsushita Electric Ind Co Ltd Optical recording and reproducing device
JPS59157226U (en) * 1983-04-07 1984-10-22 三洋電機株式会社 Recording beam limiting circuit
JPS623445A (en) * 1985-06-28 1987-01-09 Teac Co Recording disk
JPS63239623A (en) * 1987-03-26 1988-10-05 Matsushita Electric Ind Co Ltd Optical recording and reproducing device
JPS6439633A (en) * 1987-08-04 1989-02-09 Mitsubishi Electric Corp Method for driving recording medium
JPH03276918A (en) * 1989-06-08 1991-12-09 Fuji Photo Film Co Ltd Preamplifier and waveform shaping circuit
JPH04350800A (en) * 1991-05-28 1992-12-04 Matsushita Electric Works Ltd Self-fire alarm system for multiple dwelling house

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5936335A (en) * 1982-08-24 1984-02-28 Matsushita Electric Ind Co Ltd Optical disk and its recording and reproducing method
JPS59144054A (en) * 1983-02-07 1984-08-17 Matsushita Electric Ind Co Ltd Optical recording and reproducing device
JPS59157226U (en) * 1983-04-07 1984-10-22 三洋電機株式会社 Recording beam limiting circuit
JPH0110752Y2 (en) * 1983-04-07 1989-03-28
JPS623445A (en) * 1985-06-28 1987-01-09 Teac Co Recording disk
JPS63239623A (en) * 1987-03-26 1988-10-05 Matsushita Electric Ind Co Ltd Optical recording and reproducing device
JPS6439633A (en) * 1987-08-04 1989-02-09 Mitsubishi Electric Corp Method for driving recording medium
JPH03276918A (en) * 1989-06-08 1991-12-09 Fuji Photo Film Co Ltd Preamplifier and waveform shaping circuit
JPH04350800A (en) * 1991-05-28 1992-12-04 Matsushita Electric Works Ltd Self-fire alarm system for multiple dwelling house

Similar Documents

Publication Publication Date Title
JPS56145533A (en) Tracking control device in optical recording and reproducing device
JPS57150144A (en) Optical recorder and reproducer
JPS57199903A (en) Position detector
AU6843590A (en) A circuit for measuring the level of an electrical signal and including offset correction means, and application thereof to amplifiers having automatic gain control
JPS57199904A (en) Inclination controller
US5291466A (en) Automatic control system for a tracking servo unbalance of optical disk player
JPS6446237A (en) Optical information recording and reproducing device
ATE187585T1 (en) CIRCUIT ARRANGEMENT WITH A MULTIPLEXER
FI850248L (en) KOPPLINGSANORDNING FOER DIGITAL NIVAOREGLERING.
JPS6425356A (en) Agc gain control circuit for optical recording and reproducing device
JPS53110805A (en) Optical information recording/reproducing device
JPS52134705A (en) Optical recorder/reproducer unit
JPH0535453Y2 (en)
JPS6022746A (en) Automatic control circuit of servo gain
JPS57196213A (en) Hologram scanner
JPS54107311A (en) Fluctuation compensator of reproduction envelope signal in optical recorder-reproducer
JPS5569812A (en) Positioning control system
JPS5656076A (en) Reproduced signal compensation circuit of recording disk reproducing device
JPS536553A (en) Variable gain amplifier
JPS6439638A (en) Optical reproducing device
JPS54153006A (en) Controlling methof for drift of reproduction light power of image signal
JPS6443818A (en) Optical information recording and reproducing device
KR970003701Y1 (en) Automatic rf level control apparatus for optical disc system
JPH0388131A (en) Automatic loop gain control circuit
EP0361920A3 (en) Pickup control circuit for optical disc reproducing apparatus