Capacitive measurement system

Details Capacitive measurement system Capacitive measurement system

2006-10-31

2006-10-31

Lee, Diane (Department: 2858)

Electricity: measuring and testing

Impedance, admittance or other quantities representative of...

Lumped type parameters

C324S658000, C324S686000, C324S679000

Reexamination Certificate

active

07129714

ABSTRACT:
Sensor circuits for the measurement of small variations in the value of a sensing capacitor. An alternating voltage excites the sensing capacitor a predetermined frequency whereby the voltage on the sensing capacitor reverses polarity. This voltage on the sensing capacitor is sampled each time the voltage reverses polarity. An accumulator accumulates the sampled charges from the sensing capacitor. An output signal that represents the charge in the charge accumulating means indicates the measured capacitance.

REFERENCES:
patent: 5194819 (1993-03-01), Briefer
patent: 5629629 (1997-05-01), Tielert et al.
patent: 5659254 (1997-08-01), Matsumoto et al.
patent: 6362627 (2002-03-01), Shimamoto et al.
patent: 6377056 (2002-04-01), Hanzawa et al.
patent: 6639414 (2003-10-01), Lien
Jones, R.V. and Richards,J.C.S. “The Design and Some Applications of Sensitive Capacitance Micrometers” Journal of Physics E: Scientific Instruments 1973, vol. 6, pp. 589-600, Great Britain.
Baxter, Larry K., “Capacitive Sensors Design and Applications”, 1997, pp. v-xi and Chapter IV pp. 48-60, IEEE Press, Piscataway, NJ.

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