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

Claim 0:
1. A processing system comprising:
an amplifier configured to generate, from a plurality of spatial-common-mode-processed signals, a spatial common mode estimate and a plurality of feedback signals;
a plurality of charge integrators configured to:
obtain 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, and
generate 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;

a string of resistors connected in series and a switch array, wherein the string of resistors and the switch array are connected to an output of the amplifier, and wherein the switch array is configured to select, from nodes in the string of resistors, the plurality of feedback signals; and
a controller configured to determine the spatial common mode estimate from a center tap in the string of resistors.