JPS56145533A - Tracking control device in optical recording and reproducing device - Google Patents
Tracking control device in optical recording and reproducing deviceInfo
- 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
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.
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)
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 |
-
1980
- 1980-04-15 JP JP4971980A patent/JPS56145533A/en active Pending
Cited By (9)
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 |
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