Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism – Controlling the head
Patent
1994-08-30
1997-12-02
Psitos, Aristotelis
Dynamic magnetic information storage or retrieval
Automatic control of a recorder mechanism
Controlling the head
360 53, 360 7814, G11B 5596, G11B 509
Patent
active
056942656
ABSTRACT:
A duty pulse is formed by setting in response to a leading edge of a clock synchronized with a peak detection of a servo frame read signal by a peak detecting circuit and by resetting by a signal by which a zero-cross point of a read signal of a phase servo pattern was detected. A head position signal is formed by integrating the duty pulse. Since there is a deviation of the timings between the peak detection and the zero-cross detection, a duty ratio is measured so as to be adjusted to 50% in the on-track state of a target cylinder. The timings for a reference clock and a zero-cross detection pulse are delayed and adjusted accordingly.
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Chiba Makoto
Hashimoto Syuichi
Kanegae Masahide
Kosugi Tatsuhiko
Yoshida Susumu
Fujitsu Limited
Neal Regina Y.
Psitos Aristotelis
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