Dead track acquisition for phase-locked loop control

Details Dead track acquisition for phase-locked loop control Dead track acquisition for phase-locked loop control

1988-09-08

1990-08-14

Canney, Vincent P.

Dynamic magnetic information storage or retrieval

General processing of a digital signal

Data clocking

G11B 505

Patent

active

049491970

ABSTRACT:
An improved phase-locked loop control having DEAD TRACK acquisition wherein a separate oscillator generates a fixed frequency of digital pulses corresponding to the frequency of the data board in the storage media and, in the event of a DEAD TRACK in the storage media, the phase-locked loop control locks onto the fixed frequency output of the oscillator to insure lock during DEAD TRACK integral.

REFERENCES:
patent: 3641534 (1972-02-01), Irwin
patent: 3806822 (1974-04-01), Meyer et al.
patent: 3865981 (1975-02-01), Welch et al.
patent: 4068198 (1978-01-01), Otto
patent: 4369515 (1983-01-01), Valdes
patent: 4594703 (1986-06-01), Tomisawa et al.
patent: 4613979 (1986-09-01), Kent
patent: 4633193 (1986-12-01), Scordo
patent: 4680651 (1987-07-01), Blessinger
patent: 4737866 (1988-04-01), Ebata

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