Capacitive transducer with continuous sinusoidal output

Details Capacitive transducer with continuous sinusoidal output Capacitive transducer with continuous sinusoidal output

1982-01-29

1984-01-31

Groody, James J.

Communications: electrical

Continuously variable indicating

With particular transmitter

324 61R, 340347P, G08C 1910

Patent

active

044293070

ABSTRACT:
A capacitive encoder utilizing a stationary plate having transmitter elements and receiver elements located on the surface thereof and a moving plate having two conductive areas separated by a sine wave shaped gap. The receiver elements on the stationary plate overlie the gap and provide outputs which vary as a function of the position of the gap with respect to the output elements. Signals from the output elements are differentially amplified and demodulated in order to provide precise sine and cosine outputs, the accuracy of which are unaffected by variations in the input signal.

REFERENCES:
patent: 3068457 (1962-12-01), Nevius
patent: 3125716 (1964-03-01), Machlis
patent: 3219920 (1965-11-01), Wall
patent: 3312892 (1975-01-01), Parnes
patent: 3702467 (1972-11-01), Melnyk
patent: 3784897 (1974-01-01), Norrie
patent: 3860918 (1975-01-01), Cencel
patent: 3938113 (1976-02-01), Dobson et al.
patent: 3961318 (1976-06-01), Farrand et al.
patent: 4092579 (1978-05-01), Weit

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