Power amplifier with load switching circuit
AssigneeAnadigics, Inc.
InventorGee Samuel Dow
Life of this patent
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Abstract
A power amplifier circuit includes a power amplifier responsive to a power mode signal, the power amplifier having a power amplifier output node, and a power amplifier load circuit also responsive to the power mode signal, the power amplifier load circuit having a load circuit input node connected to the power amplifier output node. The power amplifier load circuit has a first transmission line coupled between the load circuit input node and a first node, a harmonic filter coupled between the load circuit input node and a common node, a first capacitor coupled between the first node and the common node, and a first switch coupled between the common node and ground, where the first switch is responsive to the power mode signal.
Claims19
A power amplifier circuit comprising:
- a power amplifier responsive to a power mode signal, said power amplifier having a power amplifier output node;
- and
- a power amplifier load circuit also responsive to said power mode signal, said power amplifier load circuit having a load circuit input node connected to said power amplifier output node;
- wherein the power amplifier load circuit comprises:
- a first transmission line coupled between the load circuit input node and a first node;
- a second transmission line coupled between the first node and a second node;
- a harmonic filter coupled between the load circuit input node and a common node;
- a first capacitor coupled between the first node and the common node;
- and
- a first switch coupled between the common node and ground,
- wherein the first switch is responsive to said power mode signal.
A power amplifier circuit, comprising:
- a power amplifier responsive to a power mode signal, said power amplifier having a power amplifier output node;
- and
- a power amplifier load circuit also responsive to said power mode signal, said power amplifier load circuit having a load circuit input node connected to said power amplifier output node;
- wherein the power amplifier load circuit comprises:
- a first transmission line coupled between the load circuit input node and a first node;
- a second transmission line coupled between the first node and a second node;
- a harmonic filter and a first switch connected to one another in series, between the load circuit input node and ground;
- a first capacitor coupled between the first node and a common node;
- a second capacitor coupled between the second node and the common node;
- and
- a second switch coupled between the common node and ground,
- wherein the first and second switches are responsive to the power mode signal.
A power amplifier circuit, comprising:
- a power amplifier responsive to a power mode signal, said power amplifier having a power amplifier output node;
- and
- a power amplifier load circuit also responsive to said power mode signal, said power amplifier load circuit having a load circuit input node connected to said power amplifier output node;
- wherein the power amplifier load circuit comprises:
- a first transmission line coupled between the load circuit input node and a first node;
- a second transmission line coupled between the first node and a second node,
- a filter and a first switch connected to one another in series, between the load circuit input node and ground;
- a first capacitor and a second switch connected to one another in series, between the first node and ground;
- and
- a second capacitor and a third switch connected to one another in series, between the second node and ground;
- wherein the first, second and third switches are all responsive to the power mode signal.
Dependencies are inferred from the claim text.