US 11,770,031 B2Granted

Wireless power transmitter for high fidelity communications and high power transfer

AssigneeNuCurrent, Inc.

InventorsAlberto Peralta, Pavel Shostak

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Abstract

Wireless power transfer systems, disclosed, include one or more circuits to facilitate high power transfer at high frequencies. Such wireless power transfer systems include a transmission integrated circuit which includes a damping circuit and a transmitter controller, configured to dampen a wireless power signal such that communications fidelity is upheld at high power. The damping circuit includes at least a damping transistor that is configured to receive, from the transmitter controller, a damping signal for switching the transistor to control damping during transmission of the wireless data signals. Utilizing such systems enables wireless power transfer at high frequency, such as 13.56 MHz, at voltages over 1 Watt, while maintaining fidelity of in-band communications associated with the higher power wireless power signal.

Claims20

Dependent claims

An integrated circuit for a wireless power transmission system, the wireless power transmission system including a transmitter antenna and an amplifier, the transmitter antenna configured to couple with at least one other antenna and transmit alternating current (AC) wireless signals to the at least one other antenna, the AC wireless signals including wireless power signals and wireless data signals and the amplifier including at least one transistor that is configured to receive a driving signal at a gate of the at least one transistor and invert a direct power (DC) input power signal to generate the AC wireless signals at an operating frequency, the integrated circuit comprising:

a transmitter controller that is configured to (i) provide the driving signal for driving the transmitter antenna based on the operating frequency for the wireless power transmission system and (ii) perform one or more of encoding the wireless data signals, decoding the wireless data signals, receiving the wireless data signals, or transmitting the wireless data signals;
and
a damping circuit that is configured to dampen the AC wireless signals to facilitate transmission of the wireless data signals, wherein the damping circuit includes at least a damping transistor that is configured to receive, from the transmitter controller, a damping signal for switching the damping transistor to control damping to facilitate transmission of the wireless data signals.

A Near-Field Communications (NFC) listener integrated circuit for an NFC wireless charging system, the NFC wireless charging system including a transmitter antenna and an amplifier, the transmitter antenna configured to couple with at least one other NFC antenna and transmit alternating current (AC) wireless signals to the at least one other NFC antenna, the AC wireless signals including wireless power signals and wireless data signals and the amplifier including at least one transistor that is configured to receive a driving signal at a gate of the at least one transistor and invert a direct power (DC) input power signal to generate the AC wireless signals at an operating frequency, the NFC listener integrated circuit comprising:

a transmitter controller that is configured to (i) provide the driving signal for driving the transmitter antenna based on the operating frequency for the NFC wireless charging system and (ii) perform one or more of encoding the wireless data signals, decoding the wireless data signals, receiving the wireless data signals, or transmitting the wireless data signals;
and
a damping circuit that is configured to dampen the AC wireless signals to facilitate transmission of the wireless data signals, wherein the damping circuit includes at least a damping transistor that is configured to receive, from the transmitter controller, a damping signal for switching the damping transistor to control damping to facilitate transmission of the wireless data signals.

Dependencies are inferred from the claim text.

Facts

Application: 17/966,553Filed 14 Oct 2022 · continuation
Priority: 28 Jun 2020
Published: US 2023/0111423 A113 Apr 2023
Granted: 26 Sep 2023
Term ends: Not estimatedThe source records don’t support an estimate.

Classification7 codes

H02J 50/80
Circuit arrangements or systems for wireless supply or distribution of electric power: involving the exchange of data, concerning supply or…
H02J 50/12
Using inductive coupling: of the resonant type
H02J 50/20
Circuit arrangements or systems for wireless supply or distribution of electric power: using microwaves or radio frequency waves
H04B 5/266
Using coils: one coil at each side, e.g. with primary and secondary coils

Family

Application16/914,405Parent of this continuation · filed 28 Jun 2020
Application17/316,239Parent of this continuation-in-part · filed 10 May 2021
US 11,005,308 B1Parent of this continuation · filed 11 May 2021
Application17/406,926Parent of this continuation · filed 19 Aug 2021
US 11,489,372 B2Parent of this continuation-in-part · filed 1 Nov 2022
US 2023/0111423 A1Pre-grant publication · published 13 Apr 2023
US 11,476,725 B2Parent of this continuation
Application17/406,926Parent of this continuation-in-part
Application17/316,239Parent of this continuation
US 11,437,870 B2Related patent
US 11,451,098 B2Related patent
US 2021/0408842 A1Published application
US 2021/0408844 A1Published application
US 11,770,031 B2This patent

From the US filing history. Foreign family members aren’t listed.