Sync data introduction method and system

Details Sync data introduction method and system Sync data introduction method and system

1992-05-22

1995-12-12

Chin, Stephen

Pulse or digital communications

Synchronizers

375371, 375357, 375376, 327144, H04L 700

Patent

active

054757150

ABSTRACT:
A data device for introducing the data read from a recording medium includes first creation device for receiving a read code signal corresponding to the data stored on a data recording medium to create first two phase signals which repeat inversion with a substantially equal period to each other on the basis of a change in the waveform of the read code; second creation device for receiving the first two phase signals to create second two phase signals with their one phase occupying most of their period having an overlapping portion with each other, the period being twice as long as that of the first two phase signals; and third creation device for receiving the read code signal and said second two phase signals to create a second code signal corresponding to the read code signal which shifts during the one phase period of said second two phase signals. The second two phase signals serve to extend sufficiently the window for introducing the read code to provide stabilized read for the data including jitter due to rotation fluctuation of the recording medium.

REFERENCES:
patent: 4425646 (1984-01-01), Kinoshita et al.
patent: 4504960 (1985-03-01), Yamada
patent: 4633488 (1986-12-01), Shaw
patent: 4947407 (1990-08-01), Silvian
patent: 4982110 (1991-01-01), Yokogawa et al.
V. Condito, et al., "A 18MB/S Bicmos Disk Drive Date Separator", IEEE 1990 Custom Integrated Circuits Conference pp. 15.2.1-15.2.4.

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