Patent ID: 8441322

Claim:
An amplifier device, comprising: an initial amplifier stage configured to receive a differential input signal at a first leg and a second leg; a final amplifier stage coupled to outputs of the initial amplifier stage, the final amplifier stage comprising a primary signal amplifier and an error amplifier in each of the first and second legs; wherein an output of the error amplifier of the first leg is combined with an output of the primary signal amplifier in the second leg, and an output of the error amplifier of the second leg is combined with an output of the primary signal amplifier in the first leg; a first coupler configured within in the first leg to combine the output of the error amplifier of the first leg with the output of the primary signal amplifier in the second leg; and a second coupler configured within in the second leg to combine the output of the error amplifier of the second leg with the output of the primary signal amplifier in the first leg, wherein the first and second couplers are configured to cancel odd order harmonics signals and intermodulation products.