Patent ID: 9118281
Filing Date: 2015-08-25
Classification: H03F,H03G

Abstract:
1. A circuit that corrects for start-up transients in power amplifiers, comprising: a boost generator arranged to provide a boost current; a reference element that provides an output bias current responsive to a static reference current and the boost current; a bias element having an input that receives the bias current and is arranged to provide a bias control output; a power amplifier responsive to the bias control output and arranged to provide an amplified power output, wherein the power amplifier provides a first amount of power gain during a first time period after the power amplifier is powered on, the first amount of power gain responsive to the sum of the boost current and the static reference current and a second amount of power gain during a second time period after the power amplifier is powered on, the second time period following the first time period, the second amount of power gain determined by decay of the output bias current to a value of the static reference current; and a polarity inversion circuit having an input that receives the boost current and is arranged to provide an output that is a mirrored boost current, wherein the bias current is responsive to the mirrored boost current.