Patent ID: 6496019
Filing Date: 2002-12-17
Classification: G01L

Abstract:
A temperature compensated pressure sensor network for providing an output sensing signal representative of an applied pressure, comprising:a reference oscillator circuit for providing a reference signal having an associated reference frequency, said oscillator circuit including a first inductor wherein said reference frequency is a predetermined function of a first inductance associated with said first inductor; a sensor circuit for providing a sensing signal having an associated sensing frequency, said sensor circuit including a second inductor and a sensing capacitor electrically coupled in series, wherein said sensing frequency is a predetermined function of a second inductance associated with said second inductor and said applied pressure; a processor for receiving said reference signal and said sensing signal and producing an output sensing signal being a predetermined function of said reference signal and said sensing signal; wherein said first inductor is physically oriented with respect to said second inductor so as to minimize effects of (i) an inductive coupling, and (ii) a parametric variation, between said first inductor and said second inductor.