Synchronous rectifier for use in a wireless power transfer system and method for synchronous rectification in wireless power transfer
AssigneeSolace Power Inc.
InventorsChris Rouse, Amir Tahavorgar
Life of this patent
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Abstract
A rectifier for use in a receiver of a wireless power transfer system for receiving wireless power transferred for a transmitter of the wireless power transfer system. The rectifier comprises a field effect transistor (FET) comprising: a source terminal electrically connected to ground; a drain terminal electrically connected to a receive element of the receiver. The receive element is for extracting power from the transmitter of the wireless power transfer system. The FET further comprises a gate terminal electrically connected to the receive element. The gate terminal is driven by a gate signal in phase with an input signal received at the receive element.
Claims13
A rectifier for use in a receiver of a wireless power transfer system, the rectifier for receiving wireless power transferred from a transmitter of the wireless power transfer system, the rectifier comprising a field effect transistor (FET) comprising:
- a source terminal electrically connected to ground;
- a drain terminal electrically connected to a receive element of the receiver, the receive element for extracting power from the transmitter of the wireless power transfer system;
- and
- a gate terminal electrically connected to the receive element, the gate terminal driven by a gate signal in phase with an input signal received at the receive element;
- and
- a trigger circuit electrically connected to the receive element and a gate driver, the trigger circuit outputting a trigger signal for operating the gate driver, wherein the trigger circuit comprises:
- a sampling circuit for sampling the input signal;
- and
- a delay line for delaying output of the sampling circuit such that the gate signal is synchronized with the input signal received at the drain terminal.
A method of rectifying an input signal received at a receive element of a receiver of a wireless power transfer system, the receiver comprising a rectifier comprising a field effect transistor (FET) comprising:
- a source terminal electrically connected to ground;
- a drain terminal electrically connected to the receive element;
- and
- a gate terminal electrically connected to the receive element, the method comprising:
- driving the gate terminal by a gate signal in phase with the input signal received at the receive element;
- driving a gate driver for generating the gate signal;
- receiving the input signal at a trigger circuit;
- operating the gate driver via a trigger signal output by the trigger circuit;
- sampling the input signal via a sampling circuit;
- and
- delaying output of the sampling circuit such that the gate signal is synchronized with the input signal received at the receive element.
Dependencies are inferred from the claim text.