Patent ID: 8299867
Filing Date: 2012-10-30
Classification: H03H

Abstract:
1. 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: