Patent ID: 11914820
Assignee: SYNAPTICS INCORPORATED
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 7:
8. A method comprising:
obtaining a plurality of resulting signals from a plurality of capacitive sensor electrodes, each of the plurality of resulting signals comprising a spatial common mode component and a residual noise component;
generating, by an amplifier and a string of resistors connected in series and connected to the output of the amplifier, a spatial common mode estimate and a plurality of feedback signals from a plurality of spatial-common-mode-processed signals;
generating the plurality of spatial-common-mode-processed signals by mitigating the spatial common mode component and the residual noise component in the plurality of resulting signals using the plurality of feedback signals; and
determining, by a controller, the spatial common mode estimate from a center tap in the string of resistors;
wherein the plurality of feedback signals are selectable by a switch array from nodes in the string of resistors.