CAPACITANCE SENSOR WITH IMPROVED NOISE FILTERING CHARACTERISTICS, METHOD FOR NOISE FILTERING OF CAPACITANCE SENSOR AND COMPUTER-READABLE RECORDING MEDIUM
First Claim
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1. A capacitance sensor comprising:
- a capacitance-voltage/current converter which converts a capacitance value of a sense capacitor into a voltage signal or a current signal by using an input signal;
a multiplier which applies a weight to an output signal of the capacitance-voltage/current converter and outputs the weighted output signal; and
an accumulator which accumulates continuously the output signal of the multiplier.
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Abstract
Disclosed is a capacitance sensor including: a capacitance-voltage/current converter which converts a capacitance value of a sense capacitor into a voltage signal or a current signal by using an input signal; a multiplier which applies a weight to an output signal of the capacitance-voltage/current converter and outputs the weighted output signal; and an accumulator which accumulates continuously the output signal of the multiplier.
40 Citations
26 Claims
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1. A capacitance sensor comprising:
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a capacitance-voltage/current converter which converts a capacitance value of a sense capacitor into a voltage signal or a current signal by using an input signal; a multiplier which applies a weight to an output signal of the capacitance-voltage/current converter and outputs the weighted output signal; and an accumulator which accumulates continuously the output signal of the multiplier. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A capacitance sensor comprising:
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a capacitance-voltage/current converter which converts a capacitance value of a sense capacitor into a voltage signal or a current signal by using an input signal; a plurality of multiplier-holders which apply a weight to an output signal of the capacitance-voltage/current converter and outputs the weighted output signal; and an adder which adds up all of the output signals of a plurality of the multiplier-holders. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. A noise filtering method of a capacitance sensor, the method comprising:
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converting a capacitance value of a sense capacitor into an electrical signal related to the capacitance value by using an input signal; generating a plurality of samples by repeating a process of applying a weight to the electrical signal and outputting; and accumulating or adding up the plurality of the samples. - View Dependent Claims (26)
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Specification