Cylinder crossing detection circuit for disc drive or the like

Details Cylinder crossing detection circuit for disc drive or the like Cylinder crossing detection circuit for disc drive or the like

1982-09-15

1985-05-07

Cardillo, Jr.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

318616, 318618, G11B 2108

Patent

active

045161780

ABSTRACT:
An improved technique for the counting of servo tracks in a position servo system wherein a single pulse is produced upon each crossing of a reference level by the servo data demodulation signal, the width of which is determined by the velocity of the servo data head relative to the medium.

REFERENCES:
patent: 3597750 (1971-08-01), Brunner et al.
patent: 3755795 (1973-08-01), Sordello et al.
patent: 4331987 (1982-05-01), Oda et al.
patent: 4381526 (1983-04-01), McLaughlin et al.
patent: 14168457 (1979-09-01), Rose
patent: 14314291 (1982-02-01), Oda et al.
R. K. Oswald, "Head Positioning Servo Design for the IBM 3344/3350 Disk Files", IEEE Transactions on Magnetics, vol. Mag 14, No. 4, 7/1978-pp. 176-177.
Commander et al., "Velocity Signal Generator", IBM TDB, vol. 17, No. 6, 11//1974-pp. 1774-1780.
Millman et al., Integrated Electronics Analog and Digital Circuits and Systems, N.Y., McGraw-Hill, 1972, pp. 568-569.

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