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US 2020/0052662 A1Published application
Power amplifier with a tracking power supply
AssigneeApex Microtechnology Corporation
InventorsGregory Michael Patchin, Miroslav Vasic, Vladan Lazarevic, Jens Eltze, Kirby Neil Gaulin, Jesus Angel Oliver, Pedro Alou, Jose Antonio Cobos
Life of this patent
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Abstract
Systems and methods are described for a power amplifier with a tracking power supply. The power amplifier may use envelope tracking. The power amplifier is protected when the output of the power amplifier is short circuited or overloaded.
Claims20
An apparatus, comprising:
- a tracking power supply configured to generate a tracking power supply output similar to a linear power amplifier output, wherein the tracking power supply is coupled to a positive voltage rail and a negative voltage rail;
- a first voltage offset power supply coupled to the tracking power supply output and the positive voltage rail;
- a second voltage offset power supply coupled to the tracking power supply output and the negative voltage rail;
- a first diode coupled to an output of the first voltage offset power supply and coupled to a positive power supply input of the linear power amplifier;
- a second diode coupled to an output of the second voltage offset voltage power supply and coupled to a negative power supply input of the linear power amplifier;
- and
- an output of the linear power amplifier coupled to a load.
4 more elements
An apparatus, comprising:
- a tracking power supply that generates a tracking power supply output similar to a linear power amplifier output, wherein the tracking power supply is coupled to a positive voltage rail and a negative voltage rail;
- a first voltage offset power supply coupled to the tracking power supply output and the positive voltage rail;
- a second voltage offset power supply coupled to the tracking power supply output and the negative voltage rail;
- a first switch coupled to an output of the first voltage offset power supply and coupled to a positive power supply input of the linear power amplifier;
- a second switch coupled to an output of the second voltage offset voltage power supply and coupled to a negative power supply input of the linear power amplifier;
- and
- an output of the linear power amplifier coupled to a load having a load current.
4 more elements
A method comprising:
- coupling a tracking power supply to a positive voltage rail and a negative voltage rail, wherein the tracking power supply is configured to generate a tracking power supply output similar to a linear power amplifier output;
- coupling a first voltage offset power supply to the tracking power supply output and the positive voltage rail;
- coupling a second voltage offset power supply to the tracking power supply output and the negative voltage rail;
- coupling a first diode to an output of the first voltage offset power supply and to a positive power supply input of the linear power amplifier;
- coupling a second diode to an output of the second voltage offset voltage power supply and to a negative power supply input of the linear power amplifier;
- and
- configuring the linear power amplifier to couple to a load.
4 more elements
Dependencies are inferred from the claim text.