Broadband linearization by elimination of harmonics and intermodulation in amplifiers
AssigneeRaytheon Company
InventorMikel J. White
Life of this patent
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Abstract
An amplifier device includes 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 including a primary signal amplifier and an error amplifier in each of the first and second legs; and 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.
Claims10
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.
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;
- and
- a balun coupled to outputs of the final amplifier stage.
A method of performing broadband linearization for an amplifier device, the method comprising:
- receiving a differential input signal at a first leg and a second leg of an initial amplifier stage;
- coupling outputs of the initial amplifier stage to a final amplifier stage, the final amplifier stage comprising a primary signal amplifier and an error amplifier in each of the first and second legs;
- combining an output of the error amplifier of the first leg with an output of the primary signal amplifier in the second leg, and combining an output of the error amplifier of the second leg with an output of the primary signal amplifier in the first leg;
- combining the output of the error amplifier of the first leg with the output of the primary signal amplifier in the second leg with a first coupler configured within in the first leg;
- and
- combining the output of the error amplifier of the second leg with the output of the primary signal amplifier in the first leg with a second coupler configured within in the second leg, wherein the first and second couplers are configured to cancel odd order harmonics signals and intermodulation products.
A method of performing broadband linearization for an amplifier device, the method comprising:
- receiving a differential input signal at a first leg and a second leg of an initial amplifier stage;
- coupling outputs of the initial amplifier stage to a final amplifier stage, the final amplifier stage comprising a primary signal amplifier and an error amplifier in each of the first and second legs;
- combining an output of the error amplifier of the first leg with an output of the primary signal amplifier in the second leg, and combining an output of the error amplifier of the second leg with an output of the primary signal amplifier in the first leg;
- and
- coupling outputs of the final amplifier stage to a balun.
Dependencies are inferred from the claim text.