Abstract: A capacitive touch-sensitive panel, including a plurality of sense electrodes biased at a fixed voltage relative to a common guard electrode, and a measuring circuit comprising: a power management integrated circuit comprising a voltage source generating a modulation voltage that is available at a guard terminal of the power management integrated circuit that is in electric connection with the guard electrode, one or more slave integrated circuits, each connected to a plurality of sense electrodes and comprising a Capacity-to-Digital converter or a plurality of Capacity-to-Digital converters that are operatively arranged for generating digital measure codes representing the instantaneous electric capacity of sense electrodes; floating communication means allowing transfer of command, timing signals and/or measure codes between the master integrated circuit and said slave integrated circuits.

Abstract: A wireless infrared pulse-transmitting system for communication with electronic components. The receiver for such a system has radically reduced current (and power) values, which permit a battery-powered receiver to remain on while awaiting transmitter signals. Use of several mosfet transistors operating in the subthreshold region minimizes power. Bandwidth requirements are met, in spite of the low power operation. In order to eliminate amplifier saturation, with the accompanying problem of recovery time which slows the transmission process, clamping circuitry is used to cause instantaneous shunting of signals when a predetermined signal level is reached.