Abstract: A method and apparatus varying, by interval, a frequency of a drive signal applied to one electrode of each of a plurality of electrode pairs, select a frequency corresponding to the frequency of the drive signal, monitor changes in capacitance of each of the electrode pairs through receive signals at the selected frequency, from the other electrode of each of the plurality of electrode pairs; and determine a position of at least two objects, which are simultaneously on a touch device, according to the monitored capacitance changes.

Abstract: An apparatus having a processing device for calibrating a touch-sensor device with calibration capacitors is described. Methods of calibrating the touch-sensor device using the same are also described. Processing device and multiple calibration capacitors are disposed on an integrated circuit (IC) die substrate. The processing device includes a measurement circuit to be coupled to a touch-sensor device and a switching circuit to selectively couple the calibration capacitors to the measurement circuit. The processing device is configured to calibrate the touch-sensor device by applying one or more capacitance touch values from one or more of the calibration capacitors using the switching circuit. The one or more capacitance touch values simulate a touch on the touch-sensor device.

Abstract: A single-layer touch-sensor device having a calibration mechanism coupled therewith is described. Included is a charge measurement circuit coupled, by a pair of electrical traces, with a slider of the single-layer touch-sensor device. A pair of calibration capacitors is included, each calibration capacitor coupled, between the slider and the charge measurement circuit, with one of the pair of electrical traces. A pair of connection switches is also included, each connection switch coupled with one of the pair of calibration capacitors.

Abstract: A single-layer touch-sensor device having a calibration mechanism coupled therewith is described. Included is a charge measurement circuit coupled, by a pair of electrical traces, with a slider of the single-layer touch-sensor device. A pair of calibration capacitors is included, each calibration capacitor coupled, between the slider and the charge measurement circuit, with one of the pair of electrical traces. A pair of connection switches is also included, each connection switch coupled with one of the pair of calibration capacitors.