Patent ID: 7899417

Claim:
A method for reducing the current consumption and increasing the efficiency of an RF power amplifier (PA), while maintaining the output power, comprising: a) determining the desired output power of said PA; for each level of the desired output power: b) tuning the load, connected to the output stage of said PA, to essentially match the output impedance of said output stage to provide maximal gain, such that the dynamic RF load line has a slope that causes it to intersect with a drain-source voltage, across said output stage, at a value that corresponds to the voltage swing required to provide said desired output power; and c) whenever the actual output power is smaller than said desired output power, further tuning said load, such that the dynamic RF load line has a slope that causes it to intersect with the drain-source voltage, across said output stage, at a value that is closest to the value that corresponds to the voltage swing required to provide said desired output power.