Capacitive pressure sensor having circuitry for eliminating stra

Details Capacitive pressure sensor having circuitry for eliminating stra Capacitive pressure sensor having circuitry for eliminating stra

1993-09-24

1995-06-13

Wieder, Kenneth A.

Electricity: measuring and testing

Impedance, admittance or other quantities representative of...

Lumped type parameters

324661, 73718, 73862626, 3612831, G01R 2726, G01L 904

Patent

active

054246504

ABSTRACT:
A pressure sensor measures pressure by measuring capacitance between two capacitive plates. Pressure change appears as a change in capacitance. Stray capacitance interferes with this measurement. The stray capacitance arises between the capacitor plates and surrounding material. Circuitry reduces stray capacitance by maintaining substantially no potential difference between a capacitor plate and surrounding material responsible for stray capacitance.

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