Varying demodulation to avoid interference

A processing system communicatively coupled with a capacitive sensor device and a display device, said processing system comprising:

• transmitter circuitry configured to transmit a transmitter signal with a transmitter electrode of said capacitive sensor device such that said transmitter signal comprises at least two transitions that occur during a non-display update time period that occurs between updates of consecutive rows within a display frame of a display device, wherein said display device at least partially overlaps a sensing region of said capacitive sensor device;
• receiver circuitry configured to receive a resulting signal with a receiver electrode of said capacitive sensor device, said resulting signal corresponds to said transmitter signal;
• demodulation circuitry configured to:
• acquire a first demodulated output by demodulating said resulting signal in a first way;
• and
• acquire a second demodulated output by demodulating said same resulting signal in a second way, wherein said second way and said first way differ in one of frequency of sampling and phase of sampling of said same resulting signal;
• and
• a demodulation type selector configured to shift said demodulation circuitry from using said first demodulated output for determining positional information to using said second demodulated output for determining positional information, wherein said shift is based at least in part upon an amount of interference.

An input device comprising:

• a display device, said display device comprising a combination electrode configured for both display updating and touch sensing;
• a receiver electrode of a capacitive sensor device, said receiver electrode disposed proximate said combination electrode and configured for touch sensing;
• and
• a processing system communicatively coupled with said combination electrode and said receiver electrode, said processing system configured to:
• transmit a transmitter signal with said combination electrode such that said transmitter signal comprises at least two transitions that occur during a non-display update time period that occurs between updates of consecutive rows within a display frame of said display device, wherein said display device at least partially overlaps a sensing region of said capacitive sensor device;
• receive a resulting signal with a receiver electrode of said capacitive sensor device, said resulting signal corresponds to said transmitter signal;
• acquire a first demodulated output by demodulating said resulting signal in a first way;
• and
• acquire a second demodulated output by demodulating said same resulting signal in a second way, wherein said second way and said first way differ in one of frequency of sampling and phase of sampling of said same resulting signal;
• and
• shift from using said first demodulated output for determining positional information to using said second demodulated output for determining positional information, wherein said shift is based at least in part upon an amount of interference.