公开(公告)号：US20230223948A1

公开(公告)日：2023-07-13

申请号：US18069459

申请日：2022-12-21

Applicant: STMicroelectronics SA ,  STMicroelectronics (Genoble2) SAS

Inventor： Julien Goulier ,  Franck Montaudon

IPC: H03M1/12 ,  H04B5/00

CPC classification number: H03M1/124 ,  H04B5/0031

Abstract: The present disclosure concerns an electronic device connected to an antenna. The electronic device delivers a first amplitude-modulated analog signal of a signal captured by the antenna, the capture signal associated with an electromagnetic field exhibiting intervals at a minimum level. The electronic device includes a first circuit, a second circuit, and a third circuit. The first circuit delivers a second analog signal by rectification and filters the first analog signal. The second circuit delivers a first binary signal based on the demodulation of the second analog signal. The third circuit couples the antenna to a resistor during each pause. The resistance value of the resistor depends on the maximum amplitude of the electromagnetic field before the pause.