Digital pressure sensor system with temperature compensation

Details Digital pressure sensor system with temperature compensation Digital pressure sensor system with temperature compensation

1979-07-26

1980-10-07

Woodiel, Donald O.

Measuring and testing

Fluid pressure gauge

With pressure and/or temperature compensation

73721, 73727, G01L 1904, G01L 906

Patent

active

042261252

ABSTRACT:
A digital pressure sensor system is disclosed wherein a pressure differential causes the resistance of two equal, diffused piezoresistors to change by equal but opposite amounts. Temperature compensation is achieved by using the temperature dependency of the piezoresistors in combination with a temperature reference resistor to establish a plurality of time durations of a distinct voltage level. The ratio of these time durations forms a temperature compensation factor which may be used to compensate the pressure reading.

REFERENCES:
patent: 3566162 (1971-02-01), Warrender
patent: 3841150 (1974-10-01), Pearson
patent: 3899695 (1975-08-01), Solomon et al.
patent: 4163396 (1979-08-01), Waugh

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