SYSTEM AND METHOD FOR SENSOR DEVICE SIGNALING USING A POLARITY RESET INTERVAL
First Claim
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1. A processing system for an input device, the processing system comprising:
- transmitter module comprising transmitter circuitry, the transmitter module configured to transmit a first transmitter signal with a first transmitter electrode, wherein the first transmitter signal comprises a first plurality of sensing cycles, the polarity of each sensing cycle of the first plurality of sensing cycles corresponds to a respective bit within a bit sequence of a first spreading code, and wherein each sensing cycle of the first plurality of sensing cycles comprises a measurement interval and a polarity reset interval; and
receiver module comprising receiver circuitry, the receiver module configured to receive a resulting signal with a receiver electrode, wherein the resulting signal comprises effects corresponding to the first transmitter signal.
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Abstract
A capacitive sensing method includes transmitting a first transmitter signal with a first transmitter electrode such that the first transmitter signal includes a first plurality of sensing cycles. A resulting signal is received with a receiver electrode, wherein the resulting signal comprises effects corresponding to the first transmitter signal. The polarity of each sensing cycle of the first plurality of sensing cycles corresponds to a respective bit within a bit sequence of a first spreading code, and each sensing cycle of the first plurality of sensing cycles comprises a measurement interval and a polarity reset interval.
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Citations
20 Claims
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1. A processing system for an input device, the processing system comprising:
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transmitter module comprising transmitter circuitry, the transmitter module configured to transmit a first transmitter signal with a first transmitter electrode, wherein the first transmitter signal comprises a first plurality of sensing cycles, the polarity of each sensing cycle of the first plurality of sensing cycles corresponds to a respective bit within a bit sequence of a first spreading code, and wherein each sensing cycle of the first plurality of sensing cycles comprises a measurement interval and a polarity reset interval; and receiver module comprising receiver circuitry, the receiver module configured to receive a resulting signal with a receiver electrode, wherein the resulting signal comprises effects corresponding to the first transmitter signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of capacitive sensing, the method comprising:
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transmitting a first transmitter signal with a first transmitter electrode, the first transmitter signal comprising a first plurality of sensing cycles; and receiving a resulting signal with a receiver electrode, wherein the resulting signal comprises effects corresponding to the first transmitter signal; wherein the polarity of each sensing cycle of the first plurality of sensing cycles corresponds to a respective bit within a bit sequence of a first spreading code; and wherein each sensing cycle of the first plurality of sensing cycles comprises a measurement interval and a polarity reset interval. - View Dependent Claims (11, 12, 13, 14, 15)
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16. A capacitive sensor device comprising:
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a first transmitter electrode; a receiver electrode; and a processing system communicatively coupled to the first transmitter electrode and receiver electrode, the processing system configured to; transmit a first transmitter signal with the first transmitter electrode, wherein the first transmitter signal comprises a first plurality of sensing cycles, the polarity of each of the first plurality of sensing cycles corresponds to a respective bit within a bit sequence of a first spreading code, and each of the first plurality of sensing cycles comprises a measurement interval and a polarity reset interval; and receive a resulting signal with the receiver electrode, wherein the resulting signal comprises effects corresponding to the first transmitter signal. - View Dependent Claims (17, 18, 19, 20)
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Specification