LOW POWER CONSUMPTION ADAPTIVE POWER AMPLIFIER

摘要

An adaptive power amplifier that may be used in a wireless communication device is configured to adjust its load line or output impedance, the number of active amplifier cells in each amplification stage, the bias of the active amplifiers, and the supply voltage input capacitive load in accordance with a supply voltage modulation type provided to the power amplifier. The supply voltage modulation types include ET, APT, DC-DC, dual, multi-state or fixed voltage supply voltages. A supply voltage converter, signaled by a baseband processor, generates the selected type of supply voltage modulation for the adaptive power amplifier. The baseband processor may also provide a control interface signal to a controller within the adaptive power amplifier. The controller, based on the received control interface signal provides a configuration signal that configures the impedance, the number of active amplifier cells, the bias of the active amplifier cells, and the supply voltage capacitive load to optimize the adaptive power amplifier based on the supply voltage modulation type.

主权项

1. A mobile communication device comprising:
an adaptive power amplifier comprising:
a RF output;a supply voltage input;a scalable amplifier stage operative to produce an RF output signal at the RF output and operative to adjust a number of amplifiers in the scalable amplifier stage in response to a configuration signal that is based on a supply voltage modulation type provided to the supply voltage input;a variable impedance operative to vary the line impedance of the adaptive power amplifier in response to the configuration signal that is based on the supply voltage modulation type provided to the supply voltage input;a bias adjustment operative to vary a bias of the amplifiers in the scalable amplifier stage in response to the configuration signal that is based on the supply voltage modulation type provided to the supply voltage input;a voltage supply capacitance adjustment circuit operative to adjust the input capacitance of the supply voltage input of the adaptive power amplifier in response to the configuration signal that is based on the supply voltage modulation type provided to the supply voltage input;a controller operatively responsive to a control interface signal, the control interface signal providing an indication of the supply voltage modulation type being used to supply the supply voltage to the supply voltage input of the adaptive power amplifier, the controller configured to provide the configuration signal.