公开(公告)号：US20250105875A1

公开(公告)日：2025-03-27

申请号：US18886196

申请日：2024-09-16

Applicant: STMicroelectronics International N.V.

Inventor： Marc HOUDEBINE ,  Sylvain MAJCHERCZAK ,  Florent SIBILLE

IPC: H04B5/20 ,  H04B5/48

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 an electromagnetic field intended to be received by an antenna and to deliver as an output a first clock signal. A transmit circuit includes an output coupled to the antenna and operates to deliver on its output a modulation signal in phase with the reception signal. A compensation circuit is configured to compensate for a first delay of the first clock signal due to the receive circuit and to the amplitude of the reception signal. The compensation circuit operates to determine a phase-shift value to be applied to an input signal of the transmit circuit to compensate for the first delay.