JPS5637866A - Disk player - Google Patents
Disk playerInfo
- Publication number
- JPS5637866A JPS5637866A JP11175679A JP11175679A JPS5637866A JP S5637866 A JPS5637866 A JP S5637866A JP 11175679 A JP11175679 A JP 11175679A JP 11175679 A JP11175679 A JP 11175679A JP S5637866 A JPS5637866 A JP S5637866A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- circuit
- switch
- detecting circuit
- dropout
- 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
Landscapes
- Moving Of The Head To Find And Align With The Track (AREA)
- Optical Recording Or Reproduction (AREA)
Abstract
PURPOSE: To perform stable tracking operation by extracting the rotation period component of tracking error detecting circuit T through a filter, by generating a signal of a large time constant in phase with and equal in level to the said component by a signal generating circuit, and by substituting the output of circuit T with the generated signal through a switch in occurrence of a dropout.
CONSTITUTION: A reproduced signal from input 14 is inputted to tracking error detecting circuit 1 and dropout detecting circuit 3 and an error signal from detecting circuit 1 enters driving circuit 2 to perform automatic tracking by output 15. The output of circuit 1, on the other hand, passes through switch 13 and filter 4 to extract a disk rotation period component. A signal of a sufficiently large time constant in phase with and equal in level to the component is inputted from gain amplifier 12 of signal generating circuit 5 to switch 12. A dropout, once generated, is detected by dropout detecting circuit 3, whose output turns off switch 13 to change switch 12 over to side (b), performing automatic tracking. Thus, the stable tracking is carried out.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11175679A JPS5637866A (en) | 1979-09-03 | 1979-09-03 | Disk player |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11175679A JPS5637866A (en) | 1979-09-03 | 1979-09-03 | Disk player |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5637866A true JPS5637866A (en) | 1981-04-11 |
Family
ID=14569384
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11175679A Pending JPS5637866A (en) | 1979-09-03 | 1979-09-03 | Disk player |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5637866A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6047276A (en) * | 1983-08-26 | 1985-03-14 | Mitsubishi Electric Corp | Information device |
JPS6083269A (en) * | 1983-10-14 | 1985-05-11 | Fuji Photo Film Co Ltd | Video reproducing device for rotating magnetic recording body |
JPS6122444A (en) * | 1984-07-10 | 1986-01-31 | Toshiba Corp | Optical disc reproducing device |
JPH01162282A (en) * | 1987-12-18 | 1989-06-26 | Hitachi Ltd | Tracking system |
-
1979
- 1979-09-03 JP JP11175679A patent/JPS5637866A/en active Pending
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6047276A (en) * | 1983-08-26 | 1985-03-14 | Mitsubishi Electric Corp | Information device |
JPS6083269A (en) * | 1983-10-14 | 1985-05-11 | Fuji Photo Film Co Ltd | Video reproducing device for rotating magnetic recording body |
JPS6122444A (en) * | 1984-07-10 | 1986-01-31 | Toshiba Corp | Optical disc reproducing device |
JPH0473221B2 (en) * | 1984-07-10 | 1992-11-20 | Tokyo Shibaura Electric Co | |
JPH01162282A (en) * | 1987-12-18 | 1989-06-26 | Hitachi Ltd | Tracking system |
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