Sensor device and method for estimating noise in a capacitive sensing device
First Claim
1. A processing system configured to sense an input object in a sensing region of a sensing device, the processing system comprising:
- a transmitter module coupled to a first transmitter electrode and a second transmitter electrode and configured to simultaneously apply a first transmitter signal to the first transmitter electrode and a second transmitter signal to the second transmitter electrode, wherein the first transmitter signal is based on a first one of a plurality of distinct codes and the second transmitter signal is based on a second one of the plurality of distinct codes; and
a receiver module comprising receiver circuitry coupled to a first receiver electrode and configured to receive a first resulting signal with the first receiver electrode, the first resulting signal comprising effects corresponding to the first and second transmitter signals and a noise component;
wherein the processing system is configured to determine an estimate of the noise component using a third one of the plurality of distinct codes which is not associated with a transmitter signal.
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Accused Products
Abstract
A processing system configured to sense an input object in a sensing region of a sensing device including a transmitter module coupled to a first transmitter electrode and a second transmitter electrode and configured to simultaneously apply a first transmitter signal to the first transmitter electrode and a second transmitter signal to the second transmitter electrode, wherein the first transmitter signal is based on a first one of a plurality of distinct codes and the second transmitter signal is based on a second one of the plurality of distinct codes. The processing system also includes a receiver module including receiver circuitry coupled to a first receiver electrode and configured to receive a first resulting signal with the first receiver electrode, the first resulting signal comprising effects corresponding to the first and second transmitter signals and a noise component. The processing system is configured to determine an estimate of the noise component using a third one of the plurality of distinct codes which is not associated with a transmitter signal.
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Citations
20 Claims
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1. A processing system configured to sense an input object in a sensing region of a sensing device, the processing system comprising:
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a transmitter module coupled to a first transmitter electrode and a second transmitter electrode and configured to simultaneously apply a first transmitter signal to the first transmitter electrode and a second transmitter signal to the second transmitter electrode, wherein the first transmitter signal is based on a first one of a plurality of distinct codes and the second transmitter signal is based on a second one of the plurality of distinct codes; and a receiver module comprising receiver circuitry coupled to a first receiver electrode and configured to receive a first resulting signal with the first receiver electrode, the first resulting signal comprising effects corresponding to the first and second transmitter signals and a noise component; wherein the processing system is configured to determine an estimate of the noise component using a third one of the plurality of distinct codes which is not associated with a transmitter signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A sensing device comprising:
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a plurality of transmitter electrodes; a plurality of receiver electrodes; and a processing system individually coupled to each of the plurality of transmitter electrodes and the plurality of receiver electrodes, the processing system configured to; simultaneously apply a first transmitter signal to a first transmitter electrode of the plurality of transmitter electrodes and a second transmitter signal to a second transmitter electrode of the plurality of transmitter electrodes, wherein the first transmitter signal is based on a first one of a plurality of distinct digital codes and the second transmitter signal is based on a second one of the plurality of distinct digital codes; receive resulting signals with the plurality of receiver electrodes, wherein each resulting signal comprises;
i) effects corresponding to the first and second transmitter signals; and
ii) a noise component; anddetermine an estimate of the noise component for each resulting signal using a third one of the plurality of distinct digital codes. - View Dependent Claims (15, 16, 17, 18)
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19. A method for capacitive sensing, the method comprising:
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simultaneously applying a first transmitter signal to a first transmitter electrode and a second transmitter signal to a second transmitter electrode, wherein the first transmitter signal is based on a first one of a plurality of distinct digital codes and the second transmitter signal is based on a second one of the plurality of distinct digital codes; receiving resulting signals with a plurality of receiver electrodes, wherein each resulting signal comprises effects corresponding to the first and second transmitter signals and an interference component; and determining an estimate of the interference component using a third one of the plurality of distinct digital codes. - View Dependent Claims (20)
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Specification