Phase demodulation using pulse signal
AssigneeRenesas Electronics America Inc.
InventorsGustavo James Mehas, Giovanni Figliozzi, Xintian Shi, Francesco Santoro
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Abstract
Systems and methods for phase demodulation is described. A wireless power transmitter can include a controller, a transmission coil, and an integrated circuit connected to the controller and the transmission coil. The integrated circuit can be configured to measure a voltage of a transmission coil of a wireless power transmitter. The integrated circuit can be further configured to generate, based on the measured voltage, a pulse signal comprising a plurality of pulses. The integrated circuit can be further configured to send the pulse signal to the controller of the wireless power transmitter. The controller can be configured to perform phase demodulation using the pulse signal.
Claims20
An apparatus comprising:
- a circuit configured to:
- measure a voltage of a transmission coil of a wireless power transmitter;
- determine a zero crossing time of the measured voltage;
- generate, based on the zero crossing time of the measured voltage and a switch node voltage of the wireless power transmitter, a pulse signal comprising a plurality of pulses;
- and
- send the pulse signal to a controller of the wireless power transmitter.
A wireless power transmitter comprising:
- a controller;
- and
- an integrated circuit connected to the controller and a transmission coil of the wireless power transmitter, the integrated circuit being configured to:
- measure a voltage of the transmission coil of the wireless power transmitter;
- determine a zero crossing time of the measured voltage;
- generate, based on the zero crossing time of the measured voltage and a switch node voltage of the wireless power transmitter, a pulse signal comprising a plurality of pulses;
- and
- send the pulse signal to the controller of the wireless power transmitter,
- wherein the controller is configured to perform phase demodulation using the pulse signal.
A method for performing phase demodulation, the method comprising:
- measuring, by a device, a voltage of a transmission coil of a wireless power transmitter;
- determining, by the device, a zero crossing time of the measured voltage;
- based on the zero crossing time of the measured voltage and a switch node voltage of the wireless power transmitter, generating, by the device, a pulse signal comprising a plurality of pulses;
- and
- performing, by the device, phase demodulation using the pulse signal.
Dependencies are inferred from the claim text.