Touch screen sensor integrated circuit, a method of operating the same, and a system including the same

A touch screen sensor integrated circuit, comprising:

• a plurality of pins configured to receive a plurality of current signals, wherein each current signal is generated according to mutual capacitance in response to a modulation signal;
• a current conveyor configured to sense the current signals and generate a plurality of sensed current signals corresponding to each of the current signals;
• and
• a mixer configured to generate a plurality of subtracted current signals, wherein each subtracted current signal is generated by performing a subtraction on sensed current signals corresponding to a pair of the pins.

A touch screen sensor integrated circuit, comprising:

• a plurality of pins configured to receive a plurality of current signals, wherein each current signal is generated according to mutual capacitance in response to a modulation signal;
• a current conveyor configured to sense the current signals and generate a plurality of sensed current signals corresponding to each of the current signals;
• and
• a mixer configured to output the sensed current signals according to a mode selection signal, or generate a plurality of subtracted current signals, wherein each subtracted current signal is generated by performing a subtraction on sensed current signals corresponding to a pair of the pins.

A touch screen sensor integrated circuit, comprising:

• a current conveyor configured to generate a pair of sensed current signals for each received current signal;
• a mixer configured to perform a subtraction operation on the pairs of sensed current signals to generate a plurality of subtracted current signals;
• a sine-shape resampler configured to generate a plurality of fine current signals by multiplying the subtracted current signals by a sine wave;
• and
• a current converter configured to generate a plurality of output voltage signals by removing a high-frequency component of the fine current signals.