Digital clocking and detection system for a digital storage syst

Details Digital clocking and detection system for a digital storage syst Digital clocking and detection system for a digital storage syst

1982-07-06

1984-09-04

Canney, Vincent P.

Dynamic magnetic information storage or retrieval

General processing of a digital signal

Data clocking

331 25, G11B 509, H03L 710

Patent

active

044700822

ABSTRACT:
A data clocking and detection system for a digital data storage system includes a common controlled oscillator for the multiple tracks. A phase detector for each track includes a counter and decoding circuitry producing outputs representing the time occurrence of transitions in the data with respect to bit cells defined by multiple clock pulses for each bit cell. Phase errors are used to control the frequency of the VCO, and large phase errors are used to add or subtract a count from the phase counter in each phase detector.

REFERENCES:
patent: 4109236 (1978-08-01), Besenfelder et al.
patent: 4357707 (1982-11-01), Delury
patent: 4385396 (1983-05-01), Norton
"Digital Phase Error Detector", L. Taber, IBM Technical Disclosure Bulletin, vol. 23, No. 11, Apr. 1981.

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