Current-mode coarse-baseline-correction

A processing system comprising:

• a transmitter circuit configured to drive a modulated signal on a transmitter electrode;
• a receiver circuit configured to receive a resulting signal from a receiver electrode based on the modulated signal;
• and
• a coarse-baseline-correction (CBC) circuit, the coarse-baseline-correction circuit comprising:
• a capacitor coupled to an output of the transmitter circuit, and
• a current mirror where an input of the current mirror is electrically coupled to the capacitor and an output of the current mirror is coupled to an input of the receiver circuit.

A coarse-baseline-correction (CBC) circuit, comprising:

• a resistance element;
• a capacitor coupled to the resistance element;
• and
• a plurality of current mirrors where each input of the plurality of current mirrors are electrically coupled to the capacitor and each output of the plurality of current mirrors are coupled to an input of respective receiver circuits, wherein the plurality of current mirrors generate respective currents that compensate for a change of charge at the input of the respective receiver circuits.