Compensated capacitive transducer demodulator circuit

Details Compensated capacitive transducer demodulator circuit Compensated capacitive transducer demodulator circuit

G - Physics

01

R

324/44, 73/69, 3

G01R 27/26 (2006.01) G01D 5/241 (2006.01) G01L 9/00 (2006.01) G01L 9/12 (2006.01)

Patent

CA 1123225

ABSTRACT OF THE DISCLOSURE A compensation technique and network circuitry for a quad-diode demodulator and capacitive transducer combi- nation is disclosed. The compensation method includes varying the amplitude of An alternating carrier frequency oppositely to the changes produced in that amplitude by the compensable errors in the demodulator and transducer. In one preferred embodiment ratiometric compensation and temperature compensation for the demodulator and any capacitive transducer is produced. In a second embodiment linearization and temperature compensation for the demodulator and a quartz capacitive transducer is provided.

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