DRIVING SENSOR ELECTRODES FOR NOISE MEASUREMENT

摘要

In an example, a processing system for a capacitive sensing device includes a sensor module and a determination module. The sensor module includes sensor circuitry coupled to a plurality of transmitter electrodes and a plurality of receiver electrodes. The sensor module is configured to receive resulting signals from the plurality of receiver electrodes during a plurality of noise acquisition bursts while suspending transmission with the plurality of transmitter electrodes. The resulting signals include the effects of noise. The sensor module is further configured to introduce at least one time delay between a respective at least one pair of the plurality of noise acquisition bursts. The determination module is configured to determine an interference measurement for a first frequency based on the resulting signals.

主权项

1. A processing system for a capacitive sensing device, comprising:
a sensor module comprising sensor circuitry coupled to a plurality of transmitter electrodes and a plurality of receiver electrodes, the sensor module configured to:
receive resulting signals from the plurality of receiver electrodes during a plurality of noise acquisition bursts while suspending transmission with the plurality of transmitter electrodes, the resulting signals comprising effects of noise; andintroduce at least one time delay between a respective at least one pair of the plurality of noise acquisition bursts; and a determination module configured to determine an interference measurement for a first frequency based on the resulting signals.