Patent ID: 9065385
Filing Date: 2015-06-23
Classification: H03F

Abstract:
1. An RF power amplifier circuit, comprising: a power amplifier block including one or more stages of RF power amplifiers with a power amplifier input connectible to an RF transceiver transmission port, a power amplifier output connectible to an antenna, and a power amplifier reference input tied to the power amplifier input; a power converter block including a DC-DC power converter with a converter bias input connectible to a DC source, a converter output connectible to the power amplifier block to bias the one or more stages of RF power amplifiers with a bias voltage signal, a converter feedback, and a converter reference input connected to a voltage control signal source corresponding to an RF power output level; and a spur compensation block including an error amplifier, the converter feedback and the converter output being connected to a first input of the error amplifier and the voltage control signal source being connected to a second input of the error amplifier through a phase adjustment network, an output of the error amplifier generating an error control signal and connected to the power amplifier reference input together with a reference voltage signal source; wherein the bias voltage signal is opposite the error control signal, with voltage ripple spurs in the bias voltage signal being counteracted by the error control signal.