公开(公告)号：US20230269117A1

公开(公告)日：2023-08-24

申请号：US17678175

申请日：2022-02-23

Applicant: Renesas Electronics America Inc.

Inventor： Gustavo James MEHAS ,  Giovanni FIGLIOZZI ,  Xintian SHI ,  Francesco SANTORO

IPC: H04L25/49 ,  H02J50/10 ,  H03K5/01 ,  H04B5/00

CPC classification number: H04L25/4902 ,  H02J50/10 ,  H03K5/01 ,  H04B5/0075

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.

公开(公告)号：US20230216342A1

公开(公告)日：2023-07-06

申请号：US17566991

申请日：2021-12-31

Applicant: Renesas Electronics America Inc.

Inventor： Gustavo James MEHAS ,  Tae Kwang PARK ,  Giovanni FIGLIOZZI

IPC: H02J50/10 ,  H02J50/80

CPC classification number: H02J50/10 ,  H02J50/80

Abstract: In an embodiment, a wireless power transmitter is disclosed that includes a first field-effect transistor, a second field-effect transistor a coil and an analog front end. The wireless power transmitter is configured to drive the coil based at least in part on activations of the first and second field-effect transistors. The analog front end includes a first driver corresponding to the first field-effect transistor and being configured to control activation of the first field-effect transistor based at least in part on a pulse-width modulation signal and a second driver corresponding to the second field-effect transistor and being configured to control activation of the second field-effect transistor based at least in part on the pulse-width modulation signal.

公开(公告)号：US20230291365A1

公开(公告)日：2023-09-14

申请号：US17691315

申请日：2022-03-10

Applicant: Renesas Electronics America Inc.

Inventor： Gustavo James MEHAS ,  Marcin Kamil AUGUSTYNIAK ,  Giovanni FIGLIOZZI

IPC: H03F3/04 ,  H02J50/10

CPC classification number: H03F3/04 ,  H02J50/10 ,  H03F2200/375

Abstract: Systems and methods for calibrating a wireless power transmitter is described. A wireless power transmitter can include a controller and an amplifier module. The amplifier module can include an amplifier configured to amplify a voltage converted from a current proportional to power consumed by a wireless power transmitter, and a circuit connected to the amplifier. The circuit can be configured to receive a control signal from the controller. The circuit can be further configured to perform time division multiplexing on an output of the amplifier according to the control signal. A time division multiplexed output of the amplifier can include calibration data of the amplifier. The amplifier can be configured to output the time division multiplexed output to the controller.

公开(公告)号：US20230388174A1

公开(公告)日：2023-11-30

申请号：US18320570

申请日：2023-05-19

Applicant: Renesas Electronics America Inc.

Inventor： Damla Solmaz ACAR ,  Mihail JEFREMOW ,  Jure MENART ,  Pooja AGRAWAL ,  Amit BAVISI ,  Gustavo James MEHAS

IPC: H04L27/36 ,  H04B5/00

CPC classification number: H04L27/365 ,  H04B5/0037 ,  H04B5/0075

Abstract: Systems and methods for demodulating a signal is described. A device can receive a modulated signal that encodes data. The device can sample a voltage of the modulated signal to generate a plurality of samples in digital domain. The device can determine in-phase data and quadrature data of the plurality of samples. The device can determine amplitude data and phase data based on the in-phase data and the quadrature data. The device can decode the amplitude data and phase data into digital symbols that represent the data encoded in the modulated signal.

公开(公告)号：US20220205816A1

公开(公告)日：2022-06-30

申请号：US17319659

申请日：2021-05-13

Applicant: Renesas Electronics America Inc.

Inventor： Gustavo James MEHAS ,  Damla ACAR ,  Ashley DE WOLFE ,  Pooja AGRAWAL ,  Nicholaus Wayne SMITH

IPC: G01D5/20 ,  G06F3/03 ,  H04M1/02

Abstract: A method and a system may inductively determine a position of a display screen of a computing device. Associated processes may generate a magnetic field by providing an alternating current to a driver coil, and may generate a voltage at a sensor coil in response to the magnetic field. The system and method may additionally include determining a position of the display screen by executing an algorithm at a processor. An input to the algorithm may include voltage data associated with the voltage generated at the sensor coil.

公开(公告)号：US20240388139A1

公开(公告)日：2024-11-21

申请号：US18423496

申请日：2024-01-26

Applicant: Renesas Electronics America Inc.

Inventor： Adnan DZEBIC ,  Gustavo James MEHAS ,  Pooja AGRAWAL

IPC: H02J50/80 ,  H02J7/00

Abstract: In an embodiment, an apparatus is disclosed. The apparatus includes a battery and a wireless power receiver. The wireless power receiver includes a controller and a memory subsystem. The controller is configured to perform a handshake with a wireless power transmitter. The handshake corresponds to a temporary suspension of a power transfer between the wireless power transmitter and the wireless power receiver. The controller is configured to transition the wireless power receiver from a power transfer mode, in which power is transferred wirelessly from the wireless transmitter to the wireless receiver, to a cloak mode, in which the power transfer is suspended, based on the handshake and obtain a supply of power from the battery based on the transition to the cloak mode, the power being configured for use by the controller to maintain power transfer state information about the temporarily suspended power transfer in the memory subsystem.

公开(公告)号：US20230275619A1

公开(公告)日：2023-08-31

申请号：US17680794

申请日：2022-02-25

Applicant: Renesas Electronics America Inc.

Inventor： Gustavo James MEHAS ,  Giovanni FIGLIOZZI

IPC: H04B5/00 ,  H02J50/12 ,  H02J50/40 ,  H02J50/60

CPC classification number: H04B5/0037 ,  H04B5/0087 ,  H02J50/12 ,  H02J50/40 ,  H02J50/60

Abstract: In an embodiment, a semiconductor device is disclosed that comprises a multiplexer. The multiplexer is configured to receive signals from each of a plurality of transmission coils of a wireless power transmitter as inputs and to output an output signal based at least in part on one of the signals. The semiconductor device further comprises an attenuator connected to the multiplexer that is configured to adjust a voltage of the output signal. The attenuator comprises a variable resistance. The semiconductor device further comprises a plurality of pull down circuits each corresponding to one of the transmission coils. The pull down circuits are configured to selectively clamp the signals received from the corresponding transmission coils to ground.