Monolithic supply-modulated RF power amplifier and DC-DC power converter IC
First Claim
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1. A RF power amplifier configured to receive an RF input signal, comprising:
- a switched-mode power amplifier supplied by a synchronous buck DC-DC power supply;
a controller configured to control the power supplied by the synchronous buck DC-DC power supply;
wherein the controller is connected to a feedback loop that is configured to provide the controller with a signal capable of being used by the controller to adjust the level of the voltage supplied by the synchronous buck DC-DC power supply in response to variations in the envelope of the RF input signal; and
wherein the RF input signal is provided to the input of the switched-mode power amplifier via a limiter, which limits the variation in the level of the RF input signal; and
the limiter provides the limited RF input signal to a resonant gate drive that is connected to the input of the switched-mode power amplifier.
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Abstract
Embodiments of RF power amplifiers are disclosed that include switched-mode power amplifiers supplied by synchronous buck DC-DC converters. The switched-mode power amplifiers can be used to amplify a limited form of an RF input signal and the supply to the switched-mode power amplifier is varied in response to the envelope of the RF input signal. One embodiment includes a switched-mode power amplifier connected to a synchronous buck DC-DC converter.
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Citations
10 Claims
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1. A RF power amplifier configured to receive an RF input signal, comprising:
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a switched-mode power amplifier supplied by a synchronous buck DC-DC power supply; a controller configured to control the power supplied by the synchronous buck DC-DC power supply; wherein the controller is connected to a feedback loop that is configured to provide the controller with a signal capable of being used by the controller to adjust the level of the voltage supplied by the synchronous buck DC-DC power supply in response to variations in the envelope of the RF input signal; and wherein the RF input signal is provided to the input of the switched-mode power amplifier via a limiter, which limits the variation in the level of the RF input signal; and the limiter provides the limited RF input signal to a resonant gate drive that is connected to the input of the switched-mode power amplifier. - View Dependent Claims (2, 3)
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4. A RF power amplifier, comprising a switched-mode power amplifier connected to a synchronous buck DC-DC converter, and
a resonant sate drive connected to an input of the switched-mode power amplifier.
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9. A RF power amplifier, comprising:
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a switched-mode power amplifier connected to a synchronous buck DC-DC converter; a resonant gate drive connected to an input of the switched-mode power amplifier; a limiter connected to an input of the resonant gate drive; a controller connected to an input of the synchronous buck DC-DC converter; a comparator including an output connected to the controller; a first envelope detector connected to a first input of the comparator; and a second envelope connector connected to a second input of the comparator and to an output of the switched-mode power amplifier by an attenuator. - View Dependent Claims (10)
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Specification