Electronic tachometer

Details Electronic tachometer Electronic tachometer

1979-06-18

1981-04-21

Eddleman, Alfred H.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

324177, 318561, 318618, 318632, 360 78, G11B 2110, G11B 1914, G11B 554

Patent

active

042636272

ABSTRACT:
An electronic tachometer that includes an integrator for producing a speed signal by integrating a signal representative of acceleration of a body and a differentiator for producing a speed signal by differentiating a signal representative of the position of the body, the differentiator being formed by a passive RC circuit and operatively associated with circuitry for alternately supplying to the differentiator two signals representative of position, one of which is inverted so that signals of a single polarity are supplied to the differentiator, and further circuitry for connecting the differentiator output to the integrator feedback circuitry so as periodically to update or reset the speed signal produced by the integrator, which is formed by an operational amplifier having a capacitive feedback which is shunted by a resistor when the differentiator output is active to update the integrator.

REFERENCES:
patent: 3568059 (1971-03-01), Sordello
patent: 3737883 (1973-06-01), Sordello et al.
patent: 3820712 (1974-06-01), Oswald
patent: 3883894 (1975-05-01), Johnson
patent: 4006394 (1977-02-01), Cuda et al.
patent: 4134053 (1979-01-01), Klinger
patent: 4168457 (1979-09-01), Rose
patent: 4184108 (1980-01-01), Sordello et al.

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