Patent ID: 8717103

Claim:
A power amplifier comprising: a first transistor; a first inductor disposed between the first transistor and a voltage source, wherein a first node between the first transistor and the first inductor is a first output node; a second inductor disposed between the first transistor and ground; a second transistor; a third inductor disposed between the second transistor and ground, wherein a second node between the second transistor and the third inductor is a second output node; a fourth inductor disposed between the second transistor and the voltage source; a first capacitor disposed between the first output node and the second output node, wherein the first capacitor is configured as a pathway for cancellation of even harmonic signals on opposite ends of the first capacitor, wherein the even harmonic signals are harmonics of a fundamental frequency of a received AC signal; a second capacitor disposed between (i) a first mid-node that is between the first transistor and the second inductor, and (ii) a second mid-node that is between the second transistor and the fourth inductor, wherein the second capacitor is configured as a pathway for cancellation of the even harmonic signals on opposite ends of the second capacitor; and a third capacitor disposed between a body of the first transistor and a body of the second transistor, wherein the third capacitor is configured as a pathway for cancellation of even harmonic signals on opposite ends of the third capacitor.