Patent ID: 8655293
Filing Date: 2014-02-18
Classification: H03F,H04B

Abstract:
1. A transmission circuit, comprising: a first transmission path extending between a signal generator and an antenna, wherein the transmission path is configured to provide a modulated signal to the antenna for transmission using a modulation scheme; a power amplifier, comprised within the first transmission path, configured to receive one or more bias voltages that vary the power amplifier's current consumption; a control circuit configured to provide one or more predetermined bias voltages to the power amplifier, wherein the one or more predetermined bias voltages are selected based upon one or more variable characteristics within the modulation scheme to have a value that optimizes the power amplifier's current consumption; wherein the one or more variable characteristics within the modulation scheme comprise a number of resource blocks which determine the instantaneous effective bandwidth of the modulation scheme and a channel bandwidth which determines the maximum bandwidth; and wherein the predetermined bias voltage has a value selected to optimize the power amplifier's current consumption based upon an adjacent channel leakage ratio (ACLR) calculated using the number of resource blocks and the channel bandwidth.