Patent ID: 9065387
Filing Date: 2015-06-23
Classification: H03F,H03G

Abstract:
1. A system for maintaining power amplifier performance, the system comprising: a bias supply configured to generate a bias voltage; at least one primary power amplifier (PA) configured to receive the bias voltage and a primary radio frequency (RF) input, the at least one primary PA configured to amplify the primary RF input based on the bias voltage; an auxiliary PA connected in parallel with the at least one primary PA, the auxiliary PA being configured to receive the bias voltage and an auxiliary RF input, the auxiliary RF input being a scaled version of the primary RF input by a scale factor, the auxiliary PA being configured to amplify the auxiliary RF input based on the bias voltage; a detector configured to measure an output voltage associated with the amplified auxiliary RF input; and a comparator configured to compare the measured output voltage to a reference voltage, wherein the bias supply is configured to adjust the bias voltage provided to the auxiliary PA and the at least one primary PA based on the comparison of the measured output voltage to the reference voltage.