An RF power amplifier circuit for amplifying an RF signal over a broad range of power with improved efficiency includes a carrier amplifier for amplifying an RF signal over a first range of power and with a power saturation level below the maximum of the broad range of power is disclosed. One or more...http://www.google.fr/patents/US6737922?utm_source=gb-gplus-shareBrevet US6737922 - N-way RF power amplifier circuit with increased back-off capability and power added efficiency using unequal input power division
N-way RF power amplifier circuit with increased back-off capability and ...