Method and apparatus for improved input sensing using a display processor reference signal

A processing system for an input device, the processing system comprising:

• a display processor configured to drive a plurality of common electrodes for updating a display device, the display processor configured to drive at least one common electrode of the plurality of common electrodes with a transmitter signal for capacitive sensing;
• and
• a sensor processor configured to receive resulting signals with a plurality of receiver electrodes when the at least one common electrode of the plurality of common electrodes is driven with the transmitter signal, wherein the sensor processor comprises:
• one or more receiver channels, and wherein each of the one or more receiver channels is configured to be coupled to at least one receiver of the plurality of receiver electrodes, wherein each of the one or more receiver channels is configured to provide an output signal based on a comparison of at least a portion of the resulting signals and a sensor processor reference signal that is based on a display processor reference signal, wherein the one or more receiver channels further comprises:
• a first input port configured to receive the resulting signal from at least one receiver electrode;
• a second input port configured to receive the sensor processor reference signal;
• and
• an output port configured to output the output signal.