Patent ID: 8299867

Claim:
An apparatus, comprising: a multi-band RF matching network coupled to a plurality of RF input ports and at least one RF output port in a communication device, the matching network comprising one or more controllable variable reactive elements, the communication device being configured for providing voice communications with another communication device; and a voltage detector coupled to the RF output port via a voltage divider to determine a voltage at the RF output port and provide voltage information to a controller, wherein the RF matching network is adapted to adjust RF power transferred from the RF input port to the RF output port by varying signals supplied to the controllable variable reactive elements to adjust the RF power at the RF output port, wherein the controller generates one or more control signals responsive to the voltage information provided by the voltage detector, and wherein the one or more controllable variable reactive elements are coupled to a bias driver circuit adapted to map the control signals that are output from the controller to a signal range that is compatible with the one or more controllable variable reactive elements in the RF matching network, wherein the one or more controllable variable reactive elements comprise at least one of: one or more reactive elements controlled by one or more semiconductor devices, wherein the one or more semiconductor devices are controlled by the one or more mapped control signals generated by the bias driver circuit; one or more reactive elements controlled by one or more micro-electro-mechanical systems (MEMS) devices, wherein the one or more MEMS devices are controlled by the one or more mapped control signals; or one or more reactive elements each having a controllable reactance, wherein the reactance of each of the one or more reactive elements is controlled by one of the one or more mapped control signals.