Power control method, device and communication terminal for improving power amplifier switch spectrum

Abstract

A power control method and device for improving radio-frequency power amplifier (RF PA) switch spectrum, the method comprising the following steps: (a) detecting the gate voltage and drain voltage, or the gate voltage and supply voltage (vdd) of a pass element (105) to obtain the saturation information of the pass element (105); (b) if the saturation information indicates that the pass element (105) is about to leave the saturation working area, shunting the drain current of the pass element (105) to the error amplifier (102) to reduce the drain output voltage, thus reducing the variation of the output voltage, preventing the output voltage from quickly approaching the supply voltage (vdd), maintaining the saturation of the pass element (105), and improving the switch spectrum characteristics of RF PA.

Dependencies are inferred from the claim text.