Automatic Selection of Noise Abatement Parameters For Touch Controllers

Abstract

When a power adapter is connected to a computing device (e.g., a notebook, a laptop, a tablet, a smartphone, etc.), the power adapter identifies itself by sending identifier information such as, for example, manufacturer, part number, revision, manufacturing date, etc. The computing device queries a locally-stored table of known power adapters to obtain related touch controller data (e.g., list of hopping frequencies, frequency hopping strategy, filtering strategy and parameters, etc.) to be used by a touch controller in the computing device for noise abatement. If the power adapter is not on the locally-stored table, the computing device queries a remotely-stored table (e.g., table stored in a cloud service), to obtain the touch controller data. The touch controller data is provided to the touch controller, which uses the data to configure a noise abatement strategy. An estimate of the load on the power adapter is provided periodically to the touch controller for as long as the power adapter is connected to the computing device