Method and apparatus for qualifying data

Details Method and apparatus for qualifying data Method and apparatus for qualifying data

1983-08-18

1986-12-02

Cardillo, Raymond F.

Dynamic magnetic information storage or retrieval

General processing of a digital signal

Data clocking

360 46, 360 51, 360 53, G11B 502, G11B 509

Patent

active

046269339

ABSTRACT:
An apparatus is provided for removing invalid read signal peaks which are detected during a disk read operation. In one embodiment, the apparatus converts the analog read-back signal from the disk into a pair of signals, a raw data signal being indicative of the signal peaks read from the disk and a raw polarity signal being indicative of the polarity of such peaks. The raw data signal is inputted to a phase lock loop, which outputs a strobe signal. The raw data signal and the raw polarity signal are made synchronous with the strobe signal in a reclocking circuit. The data and polarity signals outputted by the reclocking circuit are synchronously applied to a qualifying circuit, the output therefrom being free of invalid data.

REFERENCES:
patent: 3631263 (1971-12-01), Graham et al.
patent: 3689903 (1972-09-01), Agrawala et al.
patent: 3711843 (1973-01-01), Galvagni
patent: 3846829 (1974-11-01), Lin
patent: 4074325 (1978-02-01), Sakai et al.
patent: 4081756 (1978-03-01), Price et al.
patent: 4219152 (1980-08-01), Couch et al.
patent: 4346411 (1982-08-01), Buhler et al.
patent: 4346412 (1982-08-01), Conley
patent: 4385328 (1983-05-01), Tanaka
patent: 4399474 (1983-08-01), Coleman, Jr.
patent: 4480276 (1984-10-01), Batey et al.
patent: 4495529 (1985-01-01), Gustafson

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