Electronic tachometer with variable bandwidth differentiator

Details Electronic tachometer with variable bandwidth differentiator Electronic tachometer with variable bandwidth differentiator

G - Physics

01

P

340/148, 73/70

G01P 7/00 (2006.01) G01P 3/44 (2006.01) G06G 7/18 (2006.01) G11B 19/24 (2006.01)

Patent

CA 1079538

ELECTRONIC TACHOMETER WITH VARIABLE BANDWIDTH DIFFERENTIATOR Abstract of the Disclosure An electronic tachometer, for use in a disk drive system, to sense velocity of an accessing head mechanism relative to data tracks being accessed, comprises a first feedback loop comprising a variable bandwidth differentiator for receiving a position signal and providing a velocity signal; and a second feedback loop including the differen- tiator and means for supplying a control voltage to said differentiator in response to a variable velocity signal provided by the differentiator.

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