Wireless charger topology systems and methods
AssigneeIntel Corporation
InventorYanbo Tian
Life of this patent
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Abstract
Wireless charging of electronic devices often requires active adjustment of impedance and power level during charging. Technical solutions described herein provide systems and methods for adjusting the impedance measured at the power amplifier according to the output power level. In particular, the power amplifier impedance decreases as the power output increases, and the power amplifier impedance increases as the power output decreases. In an embodiment, the impedance adjustment includes the addition of a phase shifter.
Claims20
A wireless charging apparatus comprising:
- a power supply;
- a power amplifier to receive power from the power supply and to generate an amplified power;
- a matching circuit to receive the amplified power and to phase-shift the amplified power;
- and
- a coil to receive the phase-shifted amplified power and to generate an alternating electromagnetic field for wirelessly charging a portable electronic device via resonant inductive coupling.
A wireless charging method comprising:
- receiving amplified power from a power amplifier;
- phase-shifting the amplified power;
- and
- providing the amplified power to a coil to generate an alternating electromagnetic field for wirelessly charging a portable electronic device via resonant inductive coupling.
At least one machine-readable storage medium, comprising a plurality of instructions that, responsive to being executed with processor circuitry of a computer-controlled device, cause the computer-controlled device to:
- receive amplified power from a power amplifier;
- phase-shift the amplified power;
- and
- provide the amplified power to a coil to generate an alternating electromagnetic field for wirelessly charging a portable electronic device via resonant inductive coupling.
Dependencies are inferred from the claim text.