Miniature disk drive with spin motor control system
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United States of America Patent
Stats
-
Aug 15, 1995
Issued Date -
N/A
app pub date -
Sep 14, 1993
filing date -
Dec 19, 1990
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
Disclosed is a disk drive information storage device having a housing and a disk means for recording and reproducing information. The disk drive information storage device utilizes a spin motor control system having a start-up control circuit which includes a counter and is programmable to accommodate for changing system parameters. The start-up control circuit does not require an external capacitor and provides stable generation of the start-up pulses. The spin motor control system also includes a BEMF commutation circuit which operates utilizing digital techniques. The BEMF commutation circuit includes first and second counters that are programmable to accommodate for changing system parameters. In one embodiment, the housing has a first external dimension of about 51 mm. In another embodiment, the disk means has a diameter in the range of from about 45 mm to about 50 mm.
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