RESONANT WIRELESS POWER DRIVER WITH ADJUSTABLE POWER OUTPUT

• US 20160013660A1
• Filed: 03/14/2014
• Published: 01/14/2016
• Est. Priority Date: 03/14/2013
• Status: Active Grant

• Current Assignee: MediaTek Singapore Pte. Ltd. (MediaTek, Inc.)
• Original Assignee: MediaTek Singapore Pte. Ltd. (MediaTek, Inc.)
• Inventors: YEN, Yung-Chih, RIEHL, Patrick Stanley, SATYAMOORTHY, Anand
• Granted Patent: US 10,084,345 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H03F 3/2171 with field-effect devices H03F3/2173 - H03F3/2178 take precedence
• CPC Class Codes: H03F 3/2176 Class E amplifiers

Abstract

A resonant wireless power (RWP) system is provided that includes a signal generator that provides an input signal waveform. An amplifier structure amplifies signals for transmissions to a receiver that is powered from a fixed DC voltage supply. The amplifier structure is operated either using differential or single-ended amplifiers to provide two different output power levels, in burst mode to provide a range of output power levels, or using a capacitor in a matching network that is adjusted to provide a range of output power levels.

Claims

1. A resonant wireless power (RWP) system comprising:

a signal generator that provides an input signal waveform; and

an amplifier structure powered from a fixed DC voltage supply, wherein the amplifier structure is arranged to be operated either as a differential amplifier or as a single ended amplifier to provide two different output power levels, in burst mode to provide a range of output power levels, or using a capacitor in a matching network that is adjusted to provide a range of output power levels.

2. The RWP system of claim 1, wherein the amplifier structure has the effect of varying the power levels to a load.

3. The RWP system of claim 1, wherein amplifier structure comprises Class-D, E, or F amplifiers.

4. The RWP system of claim 1, wherein the amplifier structure avoids utilization of duty-cycle control, frequency variation or a dc-dc converter.

5. A method of controlling the power of a resonant wireless power (RWP) system comprising:

providing a signal generator that provides an input signal waveform; and

providing an amplifier structure that is powered from a fixed DC voltage supply, wherein the amplifier structure is arranged to be operated either as a differential amplifier or as a single ended amplifier to provide two different output power levels, in burst mode to provide a range of output power levels, or using a capacitor in a matching network that is adjusted to provide a range of output power levels.

6. The method of claim 5, wherein the amplifier structure has the effect of varying the power levels to a load.

7. The method of claim 5, wherein amplifier structure comprises Class-D, E, or F amplifiers.

8. The method of claim 5, wherein the amplifier structure avoids utilization of duty-cycle control, frequency variation or a dc-dc converter.