High efficiency power amplifier
AssigneeSkyworks Solutions, Inc.
InventorPhilip John Lehtola
Life of this patent
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Abstract
In some embodiments, a power amplifier circuit can include a power amplifier having an input node and an output node, and a load modulation circuit coupled to the output node of the power amplifier. The power amplifier circuit can further include a control profile configured to provide information for generating a control signal for the load modulation circuit, and a control circuit configured to generate and provide the control signal to the load modulation circuit based on the control profile. In some embodiments, the control profile can be further configured to provide information for generating a control signal for a phase compensation circuit.
Claims18
A power amplifier circuit comprising:
- a power amplifier having an input node and an output node;
- a load modulation circuit coupled to the output node of the power amplifier;
- a control profile configured to provide information for generating a control signal for the load modulation circuit;
- and
- a control circuit configured to generate and provide the control signal to the load modulation circuit based on the control profile, the control signal being generated based on a first current representative of a tunable reference current and a second current representative of a saturation detection current.
A power amplifier circuit comprising:
- a power amplifier having an input node and an output node;
- a load modulation circuit coupled to the output node of the power amplifier;
- a control profile configured to provide information for generating a control signal for the load modulation circuit;
- and
- a control circuit configured to generate and provide the control signal to the load modulation circuit based on the control profile, the load modulation circuit being configured to provide variable capacitance that depends on a control voltage representative of the control signal, such that the information provided by the control profile includes an optimized load at a minimum capacitance of the variable capacitance and an optimized load at a maximum capacitance of the variable capacitance.
A wireless device comprising:
- an antenna;
- and
- an amplifier circuit configured to amplify a radio-frequency signal associated with the antenna, the amplifier circuit including an amplifier, a load modulation circuit coupled to an output node of the amplifier, and a control profile configured to provide information for generating a control signal for the load modulation circuit, the amplifier circuit further including a control circuit configured to generate and provide the control signal to the load modulation circuit based on the control profile, the control signal being generated based on a first current representative of a tunable reference current and a second current representative of a saturation detection current.
Dependencies are inferred from the claim text.