Input data synchronizing circuit

Details Input data synchronizing circuit Input data synchronizing circuit

1981-07-08

1984-01-10

Atkinson, Charles E.

Excavating

360 51, 375118, H03L 700

Patent

active

044256469

ABSTRACT:
An input data synchronizing circuit of the invention has a synchronous control counter. Part of count value of the synchronous control counter is supplied to a count register. The count register accesses a parameter ROM utilizing, as part of an address, a count value (phase status) during the input of current data and a count value (phase status) during input of immediately preceding data. The parameter ROM outputs a correction value as an initial value for the synchronous control counter so that the synchronous control counter would output a WINDOW signal synchronous with the input data near the center of the pulse width of the WINDOW signal. The circuit of the invention further includes a rotation correction register which holds stationary time shift information serially input by the rotational errors of the floppy disk drives and which outputs the information to the parameter ROM as part of the address.

REFERENCES:
patent: 3810234 (1974-05-01), Monett
patent: 4215430 (1980-07-01), Johnson, Jr.
patent: 4245264 (1981-01-01), Allen
patent: 4270183 (1981-05-01), Robinson et al.
patent: 4281356 (1981-07-01), Sousa
patent: 4357707 (1982-11-01), Delury
patent: 4365210 (1982-12-01), Harrington et al.

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