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公开(公告)号：US11770157B2
公开(公告)日：2023-09-26
申请号：US17680794
申请日：2022-02-25
Applicant: Renesas Electronics America Inc.
Inventor： Gustavo James Mehas , Giovanni Figliozzi
CPC classification number: H04B5/0037 , H02J50/12 , H02J50/40 , H02J50/60 , H04B5/0087
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.
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公开(公告)号：US11777339B2
公开(公告)日：2023-10-03
申请号：US17566991
申请日：2021-12-31
Applicant: Renesas Electronics America Inc.
Inventor： Gustavo James Mehas , Tae Kwang Park , Giovanni Figliozzi
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.
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公开(公告)号：US11991027B2
公开(公告)日：2024-05-21
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
CPC classification number: H04L25/4902 , H02J50/10 , H03K5/01 , H04B5/24
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.
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公开(公告)号：US11811369B2
公开(公告)日：2023-11-07
申请号：US17691315
申请日：2022-03-10
Applicant: Renesas Electronics America Inc.
Inventor： Gustavo James Mehas , Marcin Kamil Augustyniak , Giovanni Figliozzi
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.
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