公开(公告)号：US20250105999A1

公开(公告)日：2025-03-27

申请号：US18886470

申请日：2024-09-16

Applicant: STMicroelectronics International N.V.

Inventor： Marc HOUDEBINE ,  Bruno LEDUC ,  Florent SIBILLE

IPC: H04L7/00 ,  G06K19/07 ,  H04B5/77

Abstract: A device of contactless communication by active load modulation includes a receive circuit configured to receive as an input a reception signal originating from a magnetic field intended to be received by an antenna. A transmit circuit has an output coupled to the antenna with a modulation signal in phase with the reception signal intended to be delivered thereon. A circuit compensates for a delay of the modulation signal due to the transmit circuit and to the amplitude of the reception signal. The compensation circuit determines a phase-shift value to be applied to an input signal of the transmit circuit to compensate for the delay.