Snr-aware active mode touch scans

Abstract

A touch controller can dynamically balance performance criteria, such as signal-to-noise ratio (SNR) thresholds, with power consumption for touch sensitive devices. A touch controller can be configured to reduce power consumption by reconfiguring bank boundaries for an active mode scan so as to reduce the number of banks scanned with a banked active mode scan. Additionally or alternatively, the stimulation signal amplitude and integration time of the touch controller can be dynamically adjusted to balance performance criteria with power consumption. Default integration times and default stimulation signal amplitudes can be increased in higher-noise operating environments to raise SNR, and can be reduced to save power in lower-noise operating environments. Additionally or alternatively, the touch scanning rate of the touch controller can be dynamically adjusted to reduce power consumption of the touch sensitive device or to reallocate touch sensing frames to increase integration times and thereby SNR performance.

Dependencies are inferred from the claim text.