Data detection apparatus

Details Data detection apparatus Data detection apparatus

1996-09-13

1997-09-09

Huber, P. W.

Dynamic information storage or retrieval

Binary pulse train information signal

Binary signal gain processing

360 51, G11B 509

Patent

active

056663412

ABSTRACT:
A reproduced signal is digitized so as to count a time interval of a specified pattern simultaneously with the count of a clock period of a phase lock loop circuit. A phase lock loop clock frequency is subjected to a feedback control based on the information indicated the difference between the time interval and the clock period. In this manner, a frequency loop performs a feedback operation so that a frequency of the reproduced signal falls within a capture range of a phase lock-in, thereby increasing the speed of phase lock-in.

REFERENCES:
patent: 4961182 (1990-10-01), Saito et al.
patent: 5502711 (1996-03-01), Clark et al.

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