Patent ID: 8610503

Claim:
A method of amplifying an input radio frequency (RF) signal to generate an output RF signal, the method comprising: generating a first amplified signal by amplifying the input RF signal using a first power amplifier; generating a second amplified signal by amplifying the input RF signal using a second power amplifier, the second power amplifier including an output electrically connected to an output of the first power amplifier using a first capacitor, the second power amplifier having a power amplification greater than a power amplification of the first power amplifier; generating a third amplified signal by amplifying the input RF signal using a third power amplifier, the third power amplifier including an output electrically connected to the output of the second power amplifier using a second capacitor, the third power amplifier having a power amplification greater than the power amplification of the second power amplifier; combining the first, second and third amplified signals using the first and second capacitors to generate the output RF signal; biasing the first power amplifier with a supply voltage using a first inductor; biasing the second power amplifier with the supply voltage using a second inductor; and biasing the third power amplifier with the supply voltage using a third inductor.