Servo mechanism with differential phase shift feedback

Details Servo mechanism with differential phase shift feedback Servo mechanism with differential phase shift feedback

1991-10-28

1993-04-20

Wieder, Kenneth A.

Communications: electrical

Continuously variable indicating

Phase variation

34087035, 34087037, 324683, 324677, 324678, G01R 2726

Patent

active

052046745

ABSTRACT:
A position sensor which can be incorporated into a positional feedback-type servo mechanism includes a mechanical sensor element, an oscillator and first and second phase shifters, which in the disclosed embodiment are variable capacitors. The phase shifters are connected to the sensor element so as to increase and decrease, respectively, a phase shift of the signal generated by the oscillator as the sensor element moves in a given direction. A signal processing circuit converts the phase shifted signals into an output signal which is representative of the position of the sensor element.

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