Circuit arrangement for temperature compensation of capacitive p

Details Circuit arrangement for temperature compensation of capacitive p Circuit arrangement for temperature compensation of capacitive p

1989-09-22

1991-03-19

Woodiel, Donald O.

Measuring and testing

Fluid pressure gauge

With pressure and/or temperature compensation

73718, 73724, G01L 912, G01L 1904

Patent

active

050000489

ABSTRACT:
A circuit arrangement for temperature compensation of capacitive pressure sensors and differential pressure sensors includes two measuring capacitors (1,2) which are arranged in respective feedback branches of two measuring integrators (3, 4). The capacitance values vary as a function of the pressure or differential pressure to be detected and are converted into measurement signals by the measuring interconnect. A negative feedback circuit is provided which comprises a Schmitt trigger circuit (5) which at least generates a temperature-dependent activation signal for the measuring integrators from a measurement signal.

REFERENCES:
patent: 4392383 (1983-07-01), Bauerlen et al.

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