US 7,843,269 B2 · Cascode-cascade power amplifier assembly

Abstract

A cascode-cascade power amplifier assembly is provided. Which includes a first common-source amplifier, a second common-source amplifier, a phase shift matching network coupled to the first common-source amplifier and the second common-source amplifier for providing a 90-degree phase shift and allowing less than 50% of the output power of the first common-source amplifier to be transmitted to the second common-source amplifier, a common-gate amplifier which forms a series circuit arrangement with the first-common source amplifier and a parallel circuit arrangement with the second common-source amplifier, and an equivalent quarter-wave or three-quarter wave circuit which forms a series circuit arrangement with the common-gate amplifier and a parallel circuit arrangement with the second common-source amplifier. According to the present invention, the first common-source amplifier and the common-gate amplifier form a cascode main amplifier, while the first common-source amplifier and the second common-source amplifier form a cascade auxiliary amplifier.

Claims16

Dependent claims

A cascode-cascade Doherty power amplifier assembly, comprising:

a first common-source amplifier for receiving input signals;
a second common-source amplifier;
a phase shift matching network coupled between the first common-source amplifier and the second common-source amplifier, allowing less than 50% of an output power of the first common-source amplifier to be transmitted to the second common-source amplifier;
a common-gate amplifier for forming a series circuit arrangement with the first common-source amplifier and a parallel circuit arrangement with the second common-source amplifier, allowing the rest of the output power to be delivered to the common-gate amplifier;
and
an equivalent quarter-wave or three-quarter wave circuit for forming a series circuit arrangement with the common-gate amplifier and a parallel circuit arrangement with the second common-source amplifier;
wherein the first common-source amplifier and the common-gate amplifier form a cascode main amplifier of the cascode-cascade Doherty power amplifier and the first common-source amplifier and the second common-source amplifier form a cascade auxiliary amplifier of the cascode-cascade Doherty power amplifier.

4 more elements

A cascode-cascade Doherty power amplifier assembly, comprising:

a cascode main amplifier module for receiving input signals;
and
a cascade auxiliary amplifier module coupled to the cascode main amplifier module;
wherein the cascode main amplifier module and the cascade auxiliary amplifier module share a first common-source amplifier,
the cascade auxiliary amplifier module comprises:
the first common-source amplifier for receiving the input signals;
a second common-source amplifier;
and
a phase shift matching network coupled between the first common-source amplifier and the second common-source amplifier, the phase shift matching network being configured to provide a 90-degree phase shift and allow less than 50% of output power of the first common-source amplifier to be transmitted to the second common-source amplifier, and
the cascode main amplifier module comprises:
the first common-source amplifier;
a common-gate amplifier for forming a series circuit arrangement with the first common-source amplifier and a parallel circuit arrangement with the second common-source amplifier;
and
an equivalent quarter-wave or three-quarter wave circuit which forms a series circuit arrangement with the common-gate amplifier and a parallel circuit arrangement with the second common-source amplifier.

11 more elements

Dependencies are inferred from the claim text.

Cascode-cascade power amplifier assembly

Life of this patent

Cascode-cascade power amplifier assembly

Life of this patent

Abstract

Claims16