Capacitance sensor

Details Capacitance sensor Capacitance sensor

2011-05-17

2011-05-17

Nguyen, Vincent Q (Department: 2858)

Electricity: measuring and testing

Impedance, admittance or other quantities representative of...

Lumped type parameters

C324S679000, C324S686000

Reexamination Certificate

active

07944216

ABSTRACT:
A capacitance sensor, having at least one electrode is disclosed. A frequency spread signal generation circuit is coupled to the at least one electrode to apply a frequency spread signal based on a spread sequence. A periodic signal with a frequency is coupled to the at least one electrode. A frequency controller is coupled to the frequency spread signal generation circuit to vary the frequency of the periodic signal. A receiver circuit is coupled to the at least one or a further electrode to receive a version of the frequency spread signal which depends on a capacitance applied to the at least one electrode. An evaluation circuit is coupled to the receiver circuit to determine a capacitance value based on the received, dependent version of the frequency spread signal.

REFERENCES:
patent: 4878013 (1989-10-01), Andermo
patent: 4977786 (1990-12-01), Davis
patent: 6225710 (2001-05-01), Palata et al.
patent: 6300776 (2001-10-01), Schreiber et al.
patent: 7451050 (2008-11-01), Hargreaves
patent: 2008/0186034 (2008-08-01), Scheckenbach et al.
patent: 2 255 321 (1999-06-01), None
patent: 198 13 013 (1999-09-01), None

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