Uso de los sweet-spots de gran señal en funciones de control de potencia de alta linealidad

Abstract

In this paper a novel technique for controlling the output power in class B amplifiers is presented. The new approach uses the large-signal sweet-spots that appear in this operation mode, to optimize the linear behavior of the device and improve the amplifier power efficiency over the complete control range. A control strategy, based in a dual bias adjustment along the sweet-spots loci, is proposed to guarantee, at the same time, high linearity and high efficiency.