Patent ID: 7221217

Claim:
A radio frequency (RF) power amplifier, comprising: a first, a second, a third, a fourth, a fifth, and a sixth transistor, each having a drain, a source, and a gate; and a first, a second, a third, and a fourth resistor; the drain of the first transistor directly connected to the sources of the second and third transistors and, the drain of the second transistor directly connected to the gate of the second transistor via the first resistor, the gate of the second transistor directly connected to the gate of the sixth transistor via the second resistor, the drain of the fourth transistor directly connected to the sources of the fifth and sixth transistors and, the drain of the fifth transistor directly connected to the gate of the fifth transistor via the third resistor, the gate of the fifth transistor directly connected to the gate of the third transistor via the fourth resistor, the fourth resistor directly connected to the gate of the third transistor and the second resistor directly connected to the gate of the sixth transistor.