Patent ID: 7956684

Claim:
A class G power amplifier, comprising: a first and a second power amplifier transistor, the first and the second power amplifier transistor each having a gate, a drain, and a source, the source of the first power amplifier transistor coupled to the drain of the second power amplifier transistor, the source of the second power amplifier transistor coupled to ground; a diode, the diode having an anode and a cathode, the anode of the diode coupled to the source of the first power amplifier and the drain of the second power amplifier transistor, the cathode of the diode coupled to a first voltage source; a decoupling capacitor, the decoupling capacitor having a first and a second end, the first end coupled to the cathode of the diode and the first voltage source, and the second end coupled to ground; a radio frequency choke, the radio frequency choke having a first and a second end, the first end coupled to the drain of the first power amplifier transistor, the second end coupled to a second voltage source; an output network coupled to the first end of the radio frequency choke and the drain of the first power amplifier transistor; a first bias voltage source coupled to the gate of the first power amplifier transistor; a second bias voltage source coupled to the gate of the second power amplifier transistor; a radio frequency source for driving the amplifier, the radio frequency source coupled to the gate of the second power amplifier transistor via the second bias voltage source; and a transformer, the transformer having an input cathode and anode and an output cathode and anode, the input cathode coupled to the radio frequency source, the input anode coupled to ground, the output cathode coupled to the gate of the first power amplifier transistor via the first bias voltage source, and the output anode coupled to the source of the first power amplifier transistor, the drain of the second power amplifier transistor, and the anode of the diode.