Abstract: Embodiments of the invention provide a touch screen. The touch screen includes a screen module composed of a plurality of constituent units, in which at least two constituent units are configured to be initially activated to detect proximity of at least one object, and a touch controller. The touch controller is configured to: periodically poll the at least two constituent units; upon detection of the proximity of the at least one object, degrade detection sensitivity of currently activated constituent units and activate other constituent units as the at least one object approaches the screen module; and calculate a location of the at least one object on the screen module based on the proximity detected by the currently activated constituent units.

Abstract: Apparatus comprises: a first radio modem having an associated first radio frequency power amplifier; a second radio modem having an associated second radio frequency power amplifier; a terminal for connection to a battery; a capacitor having first and second terminals; a current limiting switch having input and output terminals; and a direct current-direct current converter having an input and an output. The terminal is coupled to the first radio frequency power amplifier, the terminal is coupled to the input of the current limiting switch, the output of the current limiting switch is coupled to both the first terminal of the capacitor and the input of the direct current-direct current convener, and the output of the direct current-direct current converter is coupled to the second radio frequency power amplifier.

Abstract: Apparatus comprises: a first radio modem having an associated first radio frequency power amplifier; a second radio modem having an associated second radio frequency power amplifier; a terminal for connection to a battery; a capacitor having first and second terminals; a current limiting switch having input and output terminals; and a direct current-direct current converter having an input and an output. The terminal is coupled to the first radio frequency power amplifier, the terminal is coupled to the input of the current limiting switch, the output of the current limiting switch is coupled to both the first terminal of the capacitor and the input of the direct current-direct current convener, and the output of the direct current-direct current converter is coupled to the second radio frequency power amplifier.