Electronic tachometer with variable bandwidth differentiator

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

1977-06-29

1979-02-06

Gruber, Felix D.

Boots, shoes, and leggings

324160, 360 78, 364828, G01P 700, G06G 718

Patent

active

041387287

ABSTRACT:
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 differentiator and means for supplying a control voltage to said differentiator in response to a variable velocity signal provided by the differentiator.

REFERENCES:
patent: 3159741 (1964-12-01), Dahlin
patent: 3216676 (1965-11-01), Brown et al.
patent: 3273035 (1966-09-01), Inderhees
patent: 3652945 (1972-03-01), Nakane et al.
patent: 3820712 (1974-06-01), Oswald
patent: 3883894 (1975-05-01), Johnson
patent: 3994016 (1976-11-01), Moghadam
Johnson (Textbook) Analog Computer Techniques, McGraw-Hill, 1956, p. 97.

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