Apparatus with position detecting means for recording and/or rep

Details Apparatus with position detecting means for recording and/or rep Apparatus with position detecting means for recording and/or rep

1991-08-05

1994-02-08

McElheny, Jr., Donald E.

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369 4428, 235476, 235494, G11B 700

Patent

active

052854337

ABSTRACT:
In an apparatus for recording and/or reproducing data on and/or from an optical card having a plurality of tracks, each of which includes a data portion and ID portions provided at both ends of the data portion, in said data portion the data is recorded in a plurality of sectors in a reciprocal manner by projecting from an optical head a recording or reproducing light beam onto the optical card, while the optical card is moved with respect to the light beam, a relative position of the optical card with respect to the optical head is detected to derive a sector position signal. A start point of a sector for which the data will be recorded or reproduced is determined by counting the sector position signal. The sector position signal is derived by counting pulses generated by a rotary encoder coupled with the motor for moving the optical card to derive a count value and a comparator for comparing the count value with a reference value which is generated in accordance with a predetermined track format. The sector position signal may be also derived by counting PLL clock pulses which are generated on the basis of a signal obtained by reading PLL synchronizing regions in the ID portion.

REFERENCES:
patent: 4817067 (1989-03-01), Takahashi et al.
patent: 4885458 (1989-12-01), Horiguchi et al.
patent: 4896025 (1990-01-01), Hasegawa
patent: 4910725 (1990-03-01), Drexler et al.
patent: 4952786 (1990-08-01), Inoue
patent: 4958339 (1990-09-01), Koyama et al.
patent: 4985616 (1991-01-01), Nakamura et al.
patent: 5038332 (1991-08-01), Sakagami et al.
patent: 5142519 (1992-08-01), Horie

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