公开(公告)号：US20190034027A1

公开(公告)日：2019-01-31

申请号：US15660393

申请日：2017-07-26

Applicant: SYNAPTICS INCORPORATED

Inventor： Eric Scott BOHANNON ,  Steve Chikin LO ,  Keung Kwok KWAN

IPC: G06F3/041 ,  G06F3/044

Abstract: Methods and associated processing systems are disclosed for acquiring gain mismatch values and offset mismatch values corresponding to a plurality of analog-to-digital converters (ADCs). One method comprises coupling receiver circuitry of a processing system with a capacitive sensor comprising a plurality of sensor electrodes, the receiver circuitry comprising a plurality of ADCs, each ADC of the plurality of ADCs coupled with one or more respective sensor electrodes of the plurality of sensor electrodes. The method further comprises, while at least a portion of transmitter circuitry of the processing system is disabled, acquiring measurements using each ADC of the plurality of ADCs; and storing, using the acquired measurements, a plurality of offset mismatch values in a memory of the processing system. The processing system is operable to apply the plurality of offset mismatch values to capacitive measurements acquired using the plurality of ADCs.