Abstract: Disclosed is a power control method for a radio frequency power amplifier, comprising the following steps: S1. reading a power source voltage signal and a power control signal and generating an amplified signal having a linear relationship with the power control signal; S2. according to the amplified signal and saturation information, generating one or more controlled currents, merging each controlled current, and converting the merged total current into voltage; S3. Conducting linear voltage regulation on the converted voltage and generating a base control voltage of the radio frequency power amplifier. The present invention dynamically monitors the saturation information of a pass element to change the base voltage of the radio frequency power amplifier, thus improving additional power efficiency of the radio frequency power amplifier at multiple power level and over a large power source voltage range, and improving the properties of the radio frequency switch thereof.

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.

Abstract: Disclosed is a power control method for a radio frequency power amplifier, comprising the following steps: S1. reading a power source voltage signal and a power control signal and generating an amplified signal having a linear relationship with the power control signal; S2. according to the amplified signal and saturation information, generating one or more controlled currents, merging each controlled current, and converting the merged total current into voltage; S3. Conducting linear voltage regulation on the converted voltage and generating a base control voltage of the radio frequency power amplifier. The present invention dynamically monitors the saturation information of a pass element to change the base voltage of the radio frequency power amplifier, thus improving additional power efficiency of the radio frequency power amplifier at multiple power level and over a large power source voltage range, and improving the properties of the radio frequency switch thereof.