Apparatus and method for detecting a sync pattern and an address

Details Apparatus and method for detecting a sync pattern and an address Apparatus and method for detecting a sync pattern and an address

1996-03-14

1997-08-26

Edun, Muhammad N.

Dynamic information storage or retrieval

Binary pulse train information signal

Binary signal gain processing

369 32, 369 50, 369 48, 360 29, 360 48, G11B 700

Patent

active

056617089

ABSTRACT:
A disk apparatus for reproducing pulse width modulation (PWM) data from a disk is disclosed. A first sync pattern detector compares data DTLE with a first sync pattern. A second sync pattern detector compares data DTTE with a second sync pattern. A first signal generator stops the detecting operation of the first detector when the first detector has detected the first sync pattern from the data DTLE. A second signal generator stops the detecting operation of the second detector when the second detector has detected the second sync pattern from the data DTTE. A first time check circuit restarts the detecting operation of the first detector when the first sync pattern has been detected first and the second sync pattern is not detected within a predetermined period of time. A second time check circuit restarts the detecting operation of the second detector when the second sync pattern has been detected first and the first sync pattern is not detected within a predetermined period of time.

REFERENCES:
patent: 4866692 (1989-09-01), Saito et al.
patent: 5150351 (1992-09-01), Ohno et al.
patent: 5383171 (1995-01-01), Mizokami et al.

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