JPS57152574A - Tracking controlling circuit - Google Patents
Tracking controlling circuitInfo
- Publication number
- JPS57152574A JPS57152574A JP3777381A JP3777381A JPS57152574A JP S57152574 A JPS57152574 A JP S57152574A JP 3777381 A JP3777381 A JP 3777381A JP 3777381 A JP3777381 A JP 3777381A JP S57152574 A JPS57152574 A JP S57152574A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- level
- circuit
- noise
- tracking
- 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
- 101000976594 Homo sapiens Zinc finger protein 117 Proteins 0.000 abstract 1
- 102100023566 Zinc finger protein 117 Human genes 0.000 abstract 1
- 230000007257 malfunction Effects 0.000 abstract 1
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B21/00—Head arrangements not specific to the method of recording or reproducing
- G11B21/02—Driving or moving of heads
- G11B21/10—Track finding or aligning by moving the head ; Provisions for maintaining alignment of the head relative to the track during transducing operation, i.e. track following
Landscapes
- Moving Of The Head To Find And Align With The Track (AREA)
- Control Of Position Or Direction (AREA)
Abstract
PURPOSE:To prevent malfunctions of tracking control, by separating a tracking location detecting signal into a noise component and a control signal, by holding, during a period where a noise occurs, the level just before the noise, and by using the level as the control signal. CONSTITUTION:Only a high frequency component (b) is fetched from a signal (a) of a tracking location detecting circuit 6 by an HPF9, and noise are detected at the 1st and 2nd threshold circuits 10 and 11, and then, corresponding pulses (c) and (d) are generated. The opening/closing control of a switch circuit 13 is performed by a signal (e) obtained from an adder 12. The switch circuit is opened only when the signal (e) is at 0 level, and the circuit 13 supplies the location detect signal (a) to a mirror driving circuit 7. Moreover, during the period where the signal (e) is at 1 level, the level of the signal (a) just before the switch circuit 13 is opened is held by a previous value holding circuit 14 and the level is supplied to the driving circuit 7 as a false track location detecting signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3777381A JPS57152574A (en) | 1981-03-18 | 1981-03-18 | Tracking controlling circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3777381A JPS57152574A (en) | 1981-03-18 | 1981-03-18 | Tracking controlling circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS57152574A true JPS57152574A (en) | 1982-09-20 |
Family
ID=12506787
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3777381A Pending JPS57152574A (en) | 1981-03-18 | 1981-03-18 | Tracking controlling circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57152574A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6476575A (en) * | 1987-09-18 | 1989-03-22 | Pioneer Electronic Corp | Tracking circuit |
-
1981
- 1981-03-18 JP JP3777381A patent/JPS57152574A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6476575A (en) * | 1987-09-18 | 1989-03-22 | Pioneer Electronic Corp | Tracking circuit |
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