A touch sensor system includes circuits operative to perform simultaneous signal transmission and detection of signal change. First circuits are configured to transmit first signals and second signals via first sensor electrodes implemented across a touch sensor in a first direction. One of these first circuits is configured simultaneously, via one of the first sensor electrodes, to transmit and to detect change of a first one of the first signals and to transmit a first one of the second signals. Second circuits configured to transmit third signals via second sensor electrodes implemented across the touch sensor in a second direction. One of these second circuits is configured simultaneously, via one of the second sensor electrodes, to transmit and to detect change of a first one of the third signals and to detect change of the first one of the second signals.