公开(公告)号：US20240232549A9

公开(公告)日：2024-07-11

申请号：US18486373

申请日：2023-10-13

Applicant: STMicroelectronics France

Inventor： Florent Sibille ,  Marc Houdebine

IPC: G06K7/10 ,  H04L7/033

CPC classification number: G06K7/10297 ,  H04L7/0331

Abstract: In one embodiment, an object can communicate contactlessly with a reader using active load modulation. The method includes detecting a sensing magnetic field emitted by the reader, initializing a phase-locked loop of the object, detecting a stopping of the sensing magnetic field emitted by the reader before initializing the phase-locked loop of the object is complete, calibrating an oscillator of the phase-locked loop on the basis of an internal clock of the object, detecting a new sensing magnetic field of the reader after calibrating the oscillator, and implementing the phase-locked loop to adjust the phase of the oscillator after detecting a new sensing magnetic field.

公开(公告)号：US20240135119A1

公开(公告)日：2024-04-25

申请号：US18486373

申请日：2023-10-12

Applicant: STMicroelectronics France

Inventor： Florent Sibille ,  Marc Houdebine

IPC: G06K7/10 ,  H04L7/033

CPC classification number: G06K7/10297 ,  H04L7/0331

Abstract: In one embodiment, an object can communicate contactlessly with a reader using active load modulation. The method includes detecting a sensing magnetic field emitted by the reader, initializing a phase-locked loop of the object, detecting a stopping of the sensing magnetic field emitted by the reader before initializing the phase-locked loop of the object is complete, calibrating an oscillator of the phase-locked loop on the basis of an internal clock of the object, detecting a new sensing magnetic field of the reader after calibrating the oscillator, and implementing the phase-locked loop to adjust the phase of the oscillator after detecting a new sensing magnetic field.

公开(公告)号：US12164316B2

公开(公告)日：2024-12-10

申请号：US18119535

申请日：2023-03-09

Applicant: STMicroelectronics (Rousset) SAS ,  STMicroelectronics France ,  STMicroelectronics (Alps) SAS

Inventor： Alexandre Tramoni ,  Florent Sibille ,  Patrick Arnould

IPC: H04B5/79 ,  G05F1/46

Abstract: An electronic device includes a near-field communication module and a powering circuit for delivering a power supply voltage to the near-field communication module. When the near-field communication module is in a low power mode, the powering circuit is configured for an operational mode where it is periodically started to provide the power supply voltage.