Patent ID: 10193498

Abstract:
The present invention relates to a system for boosting the power supply of an RF power amplifier in high peak to average power ratio applications, wherein said power amplifier is coupled to receive and amplify a digital data stream of a baseband signal, (e.g., which after modulation with a carrier wave are supplied as the RF input signal to said power amplifier to generate an RF output signal). Said system comprises: a) a first circuit for controlling said boost by said digital data stream of said baseband signal in open-loop, wherein the timing of said boost event can be adjusted according to delays in the data stream of said system, wherein said boost event is imparted as a copy of the most significant bits of said baseband signal; and b) a second circuit for adjusting the precise timing of said boost event in such a way that the signal which controls said second circuit is the result of a comparison between a digital form of said RF input signal and/or a digital representation of the waveform of said power supply and said digital baseband signal, wherein said comparison represents the substantial matching of the delays in the paths of RF input signal and said power supply.