Apparatus and methods for power amplifiers with an injection-locked oscillator driver stage
AssigneeSkyworks Solutions, Inc.
InventorYasser Khairat Soliman
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Abstract
Apparatus and methods for power amplifiers with an injection-locked oscillator driver stage are provided herein. In certain configurations, a multi-mode power amplifier includes a driver stage implemented using an injection-locked oscillator and an output stage having an adjustable supply voltage that changes based on a mode of the multi-mode power amplifier. By implementing the multi-mode power amplifier in this manner, the multi-mode power amplifier exhibits excellent efficiency, including when the voltage level of the adjustable supply voltage is relatively low.
Claims20
A multi-mode power amplifier comprising:
- a driver stage including an injection-locked oscillator configured to receive a radio frequency input signal and to generate an injection-locked radio frequency signal;
- an output stage configured to amplify the injection-locked radio frequency signal to generate a radio frequency output signal, the output stage configured to receive power from an adjustable supply voltage;
- and
- a supply control circuit configured to control a voltage level of the adjustable supply voltage based on a mode of the multi-mode power amplifier.
A method of radio frequency signal amplification, the method comprising:
- generating an injection-locked radio frequency signal from a radio frequency input signal using an injection-locked oscillator of a multi-mode power amplifier;
- amplifying the injection-locked radio frequency signal using an output stage of the multi-mode power amplifier;
- powering the output stage using an adjustable supply voltage;
- and
- controlling a voltage level of the adjustable supply voltage based on a mode of the multi-mode power amplifier using a supply control circuit.
A packaged module comprising:
- a package substrate;
- and
- a semiconductor die attached to the package substrate, the semiconductor die including a multi-mode power amplifier including a driver stage including an injection-locked oscillator configured to receive a radio frequency input signal and to generate an injection-locked radio frequency signal, and an output stage configured to amplify the injection-locked radio frequency signal to generate a radio frequency output signal, the output stage configured to receive power from an adjustable supply voltage having a voltage level that changes based on a mode of the multi-mode power amplifier.
Dependencies are inferred from the claim text.