System and method of error reduction for differential capacitive

Details System and method of error reduction for differential capacitive System and method of error reduction for differential capacitive

1990-02-15

1991-09-17

Yasich, Daniel M.

Electricity: measuring and testing

Impedance, admittance or other quantities representative of...

Lumped type parameters

73304C, 34087037, G01F 2326, G08C 1910

Patent

active

050498258

ABSTRACT:
System and method of error reduction in which a comparator is sequentially operated to produce series of pulses in which the time distribution of the pulses is related to the displacement being monitored by the transducer. In particular, the comparator is sequentially operated to provide two sets of pulses using a positive ramp voltage, and then using a negative ramp voltage having a magnitude equal to the positive ramp voltage. Averaged time periods between the pulses are used to eliminate offset errors in the determination of the value that the transducer is monitoring. The transducer is adapted to monitor the substantially linear movement of the level (fuel-air interface) of fuel in a tank and the angular position of an input shaft.

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