Doherty power amplifier
AssigneeQorvo US, Inc.
InventorsMing Ji, Douglas Andrew Teeter
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Abstract
Disclosed is an amplifier having a carrier amplifier configured as a common-emitter carrier power stage and a peaking amplifier configured as a common-emitter peaking power stage. Further included is power adaptive biasing circuitry coupled between the carrier amplifier and the peaking amplifier, wherein the power adaptive biasing circuitry is configured to sense direct current base voltages of the common-emitter carrier power stage and to generate control currents that debias the common-emitter carrier power stage in response to the current base voltages of the common-emitter carrier power stage.
Claims27
An amplifier comprising:
- a carrier amplifier having a common-emitter carrier power stage;
- a peaking amplifier having a common-emitter peaking power stage;
- and
- power adaptive biasing circuitry coupled between the carrier amplifier and the peaking amplifier, wherein the power adaptive biasing circuitry is configured to sense direct current base voltages of the common-emitter carrier power stage and to generate control currents that debias the common-emitter carrier power stage in response to the current base voltages of the common-emitter carrier power stage.
A method for amplifying a signal, using an amplifier comprising a carrier amplifier having a common-emitter carrier power stage, a peaking amplifier having a common-emitter peaking power stage, and power adaptive biasing circuitry coupled between the carrier amplifier and the peaking amplifier, the method comprising:
- sensing direct current base voltages of the common-emitter carrier power stage;
- and
- generating control currents that debias the common-emitter carrier power stage in response to the current base voltages of the common-emitter carrier power stage.
A wireless communication device comprising:
- a baseband processor;
- transmit circuitry configured to receive encoded data from the baseband processor and to modulate a carrier signal with the encoded data, wherein the transmit circuitry comprises:
- a carrier amplifier having a common-emitter carrier power stage;
- a peaking amplifier having a common-emitter peaking power stage;
- power adaptive biasing circuitry coupled between the carrier amplifier and the peaking amplifier, wherein the power adaptive biasing circuitry is configured to sense direct current base voltages of the common-emitter carrier power stage and to generate control currents that debias the common-emitter carrier power stage in response to the current base voltages of the common-emitter carrier power stage;
- and
- at least one antenna coupled to the transmit circuitry to transmit the carrier signal.
Dependencies are inferred from the claim text.