Patent ID: 9154090
Filing Date: 2015-10-06
Classification: H03F,H03G

Abstract:
1. A circuit that corrects for start-up transients in power amplifiers, comprising: a delay element arranged to produce a delay waveform signal responsive to an input voltage signal; a transconductance element having an input that receives the delay waveform signal from the delay element and is arranged to provide an output boost current based on the delay waveform signal and a gain of the transconductance element; 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; and 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.