公开(公告)号：US20230370115A1

公开(公告)日：2023-11-16

申请号：US18160532

申请日：2023-01-27

Applicant: Apple Inc.

Inventor： Adam L. Schwartz ,  Sriram Narayanan ,  Xing Zhou

IPC: H04B5/00 ,  H02J50/10 ,  H02J50/80 ,  H04L27/06

CPC classification number: H04B5/0037 ,  H02J50/10 ,  H02J50/80 ,  H04B5/0031 ,  H04L27/06

Abstract: A wireless power system has a wireless power transmitting device and a wireless power receiving device. The wireless power transmitting device may include ASK decoding circuitry. An inverter controller may supply control signals to an inverter based on a clock signal. To improve wireless transmission at various frequencies of interest, the clock signal used by the inverter controller may be dithered using a modulating signal. To mitigate bit errors in ASK decoding caused by the dithering of the clock signal in the wireless power transmitting device, ASK communication receiving circuitry in the wireless power transmitting device may receive information regarding the modulating signal used to dither the clock signal. The ASK communication receiving circuitry may receive a clock signal that has been dithered using the modulating signal, dither an analog-to-digital converter sampling rate using the modulating signal, or include notch filtering circuitry with parameters determined based on the modulating signal.

公开(公告)号：US20230037635A1

公开(公告)日：2023-02-09

申请号：US17814099

申请日：2022-07-21

Applicant: Apple Inc.

Inventor： Sriram Narayanan ,  Xing Zhou ,  Alireza Safaee ,  Zaid A AbuKhalaf

IPC: H02J50/10 ,  H02J50/80 ,  H04L27/04 ,  H04L27/14

Abstract: A wireless power transmitter can receive the results of a characterizing signal transmitted by the wireless power receiver, compute at least two parameters of a model characterizing an in-band communications channel based on the received results of the characterizing signal transmitted by the wireless power receiver, compute a plurality of equalizing filter taps from the at least two parameters, and apply the computed equalizing filter to subsequent signals received by the wireless power transmitter via the in-band communications channel. A first parameter can correspond to a time constant of the channel, and a second parameter can correspond to a damping value of the communications channel. The wireless power transmitter can transmit to a wireless power receiver a request to transmit a characterizing signal through the in-band communication channel, wherein the characterizing signal transmitted by the wireless power receiver is sent in response to the transmitted request.

公开(公告)号：US20230361630A1

公开(公告)日：2023-11-09

申请号：US18355139

申请日：2023-07-19

Applicant: Apple Inc.

Inventor： Sriram Narayanan ,  Xing Zhou ,  Alireza Safaee ,  Zaid A AbuKhalaf

IPC: H02J50/80

CPC classification number: H02J50/80 ,  H02J50/10

Abstract: A wireless power transmitter can receive the results of a characterizing signal transmitted by the wireless power receiver, compute at least two parameters of a model characterizing an in-band communications channel based on the received results of the characterizing signal transmitted by the wireless power receiver, compute a plurality of equalizing filter taps from the at least two parameters, and apply the computed equalizing filter to subsequent signals received by the wireless power transmitter via the in-band communications channel. A first parameter can correspond to a time constant of the channel, and a second parameter can correspond to a damping value of the communications channel. The wireless power transmitter can transmit to a wireless power receiver a request to transmit a characterizing signal through the in-band communication channel, wherein the characterizing signal transmitted by the wireless power receiver is sent in response to the transmitted request.

公开(公告)号：US11784512B2

公开(公告)日：2023-10-10

申请号：US17814099

申请日：2022-07-21

Applicant: Apple Inc.

Inventor： Sriram Narayanan ,  Xing Zhou ,  Alireza Safaee ,  Zaid A AbuKhalaf

IPC: H02J50/10 ,  H04L27/14 ,  H04L27/04 ,  H02J50/80

CPC classification number: H02J50/10 ,  H02J50/80 ,  H04L27/04 ,  H04L27/14

Abstract: A wireless power transmitter can receive the results of a characterizing signal transmitted by the wireless power receiver, compute at least two parameters of a model characterizing an in-band communications channel based on the received results of the characterizing signal transmitted by the wireless power receiver, compute a plurality of equalizing filter taps from the at least two parameters, and apply the computed equalizing filter to subsequent signals received by the wireless power transmitter via the in-band communications channel. A first parameter can correspond to a time constant of the channel, and a second parameter can correspond to a damping value of the communications channel. The wireless power transmitter can transmit to a wireless power receiver a request to transmit a characterizing signal through the in-band communication channel, wherein the characterizing signal transmitted by the wireless power receiver is sent in response to the transmitted request.

公开(公告)号：US20250112501A1

公开(公告)日：2025-04-03

申请号：US18818861

申请日：2024-08-29

Applicant: Apple Inc.

Inventor： Alireza Safaee ,  Sriram Narayanan ,  Srinath Hosur ,  Xing Zhou

IPC: H02J50/12 ,  H04L27/04

Abstract: A wireless power receiver can include a wireless power transfer coil; a rectifier that receives an AC voltage induced in the wireless power transfer coil by a wireless power transmitter and generates a DC output voltage therefrom; load modulation circuitry; and control circuitry that operates the rectifier to power a load coupled thereto and operates the load modulation circuitry to communicate with the wireless power transmitter by selectively altering power drawn from the wireless power transfer coil in accordance with an amplitude shift keying modulation scheme having a plurality of modulation depths.