Pseudo-differential attenuator architecture for sinusoidal channel

A system comprising:

• a touch panel comprising:
• a plurality of transmitter (Tx) electrodes;
• and
• a plurality of receiver (RX) electrodes capacitively coupled to the plurality of Tx electrodes;
• and
• a plurality of receiver (RX) sensing circuits, each coupled to a respective RX electrode of the plurality of RX electrodes, wherein each RX sensing circuit comprises:
• an attenuator to receive a touch signal from the RX electrode and generate an attenuated current;
• a cross-coupled current mirror coupled to the attenuator, the cross-coupled current mirror to output a reverse current of the attenuated current;
• and
• a summer to combine the attenuated current with the reverse current from a neighbor RX sensing circuit of the plurality of RX sensing circuits.

A method of reducing self-capacitance of a touch panel, comprising:

• generating a reverse current with a cross-coupled current mirror coupled to an attenuator of each of a plurality of receiver (RX) sensing circuits of the touch panel;
• routing the reverse current from each RX sensing circuit to a neighbor RX sensing circuit;
• and
• combining, by each respective RX sensing circuit, an attenuated current of a touch signal with the reverse current from a neighbor RX sensing circuit of the plurality of RX sensing circuits.