Disc memory servo indexing system

Details Disc memory servo indexing system Disc memory servo indexing system

G - Physics

11

B

352/21

G11B 5/596 (2006.01) G11B 27/28 (2006.01)

Patent

CA 1320270

ABSTRACT A servo disc in a magnetic disc drive has pulses recorded in frames in concentric data tracks. Each frame includes first and second sync pulse groups of at least one sync pulse each, a first track alignment signal (Quad) following the first sync group, and a second track alignment signal (Sig) following the second sync group. A Guard Band and a data Track Zero are identified by eliminating one sync pulse in selected members of frames. Circuitry including monostable multivibrator, flip-flops, and gates identify the Guard Band and Track Zero.

562731

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