Capacitance Measurement Device With Reduced Noise
First Claim
1. A method for providing capacitive sensor detection with at least one capacitive sensor comprising a transmitting electrode and a receiving electrode, the method comprising:
- generating a stimulus at the transmitting electrode,receiving a signal from the receiving electrode and generating data packets, each packet comprising a plurality of samples;
weighting the plurality of samples by providing less gain at a beginning and end of each packet with respect to a center of each packet; and
integrating the weighted samples to generate an output signal for each packet.
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Abstract
A method or sensor arrangement for providing capacitive sensor detection with at least one capacitive sensor comprises a transmitting electrode and a receiving electrode. A stimulus at the transmitting electrode is generated and a signal is received from the receiving electrode and data packets are generated, each packet comprising a plurality of samples. The plurality of samples are weighted by providing less gain at a beginning and end of each packet with respect to a center of each packet; and the weighted samples are integrated to generate an output signal for each packet.
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Citations
28 Claims
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1. A method for providing capacitive sensor detection with at least one capacitive sensor comprising a transmitting electrode and a receiving electrode, the method comprising:
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generating a stimulus at the transmitting electrode, receiving a signal from the receiving electrode and generating data packets, each packet comprising a plurality of samples; weighting the plurality of samples by providing less gain at a beginning and end of each packet with respect to a center of each packet; and integrating the weighted samples to generate an output signal for each packet. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A sensor arrangement with at least one capacitive sensor comprising:
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a transmitting electrode configured to receive a stimulus, a receiving electrode capacitively coupled with the transmitting electrode and configured to receive a signal from the transmitting electrode, and an evaluation circuit coupled with the receiving electrode and configured to generate data packets, each packet comprising a plurality of samples, wherein the plurality of samples are weighted by providing less gain at a beginning and end of each packet with respect to a center of each packet, and wherein the evaluating circuit is further configured to integrate the weighted samples to generate an output signal for each packet. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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Specification