Patent ID: 8659356

Claim:
A power supply circuit of a power amplifier, comprising a direct current/direct current converter chip, wherein the direct current/direct current converter chip comprises an input pin, an inductance pin, and a feedback pin, and the input pin is configured to connect to a power supply and the inductance pin is connected to a voltage input end of the power amplifier through an LC storage circuit, wherein a control circuit is connected between the voltage input end of the power amplifier and the feedback pin; and the control circuit comprises a control voltage, wherein the control voltage adjusts, through the control circuit, the voltage at the voltage input end of the power amplifier, and wherein the control voltage is variable according to a calculated value of at least one of a power rating of the power amplifier PA and working frequency point of the power amplifier, wherein a corresponding relationship exists between the control voltage, the power rating of the power amplifier PA and working frequency point of the power amplifier.