Rockwell Collins, Inc.

Clayton Harmon

Michael R Vagher

Allen W Jones

Andrew J Wiebold

James L Barlett

Russell W Barta

A digital power amplifier is disclosed. The digital power amplifier may comprise an amplifying stage configured for applying a first level of attenuation to an RF input signal in response to a desired output power level of the digital power amplifier; a reference loop configured for determining an average power of a sample of the RF input signal and providing a reference value at least partially based upon the average power of the sample of the RF input signal; a feedback loop configured for applying a second level of attenuation to a sample of an output of the amplifying stage and providing a feedback value indicating an average power of the attenuated sample of the output; and an error amplifier configured for providing a gain control adjustment signal to the amplifying stage, the gain control adjustment signal being determined based upon the reference value and the feedback value.

Power amplifier control system with gain calibration

A power amplifier for a dual antenna is disclosed. The power amplifier comprises at least four controlled amplifier loops receiving a signal to be transmitted. The power amplifier also comprises a first combining structure combining at least two of the amplifier loops and a second combining structure combining at least two of the amplifier loops. The power amplifier also comprises a ninety degree hybrid receiving output from the first and second combining structures and providing output to a first antenna output and a second antenna output.

Scalable power amplifier

A digital power amplifier with variable output power control is disclosed. An amplifying stage includes a first attenuator that applies one of n attenuation steps to an RF signal in response to a desired output power level of the digital power amplifier. A feedback loop provides a gain control signal to the amplifying stage based upon an output of the amplifying stage. The feedback loop includes a second attenuator that applies another of the n attenuation steps to a sample of the output of the amplifying stage. The second attenuator applies the khighest of the n attenuation steps when the first attenuator applies the klowest of the n attenuation steps, where 1&#x2266;k&#x2266;n.

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Cedar Rapids, IA, United States of America

Clayton Harmon