公开(公告)号：US10749575B2

公开(公告)日：2020-08-18

申请号：US16361048

申请日：2019-03-21

Applicant: STMicroelectronics, Inc.

Inventor： Christophe Henri Ricard ,  Mohammad Mazooji

IPC: H04B5/00 ,  H04B5/02 ,  H04L29/08 ,  H04W4/38

Abstract: A method and near field communications (NFC) system for sensing at least one of an environmental condition or a composition of media in a proximity of the NFC system are provided. In the method and system, a first antenna irradiates an electromagnetic field during a sensor mode. A second antenna detects the electromagnetic field and outputs a voltage representative of the detected electromagnetic field. An NFC controller receives a signal representative of the voltage. The NFC controller determines at least one of the environmental condition or the composition of media based on an association stored in memory between the voltage and the at least one of the environmental condition or the composition of media.

公开(公告)号：US20190386710A1

公开(公告)日：2019-12-19

申请号：US16361048

申请日：2019-03-21

Applicant: STMicroelectronics, Inc.

Inventor： Christophe Henri Ricard ,  Mohammad Mazooji

IPC: H04B5/00 ,  H04W4/38 ,  H04B5/02 ,  H04L29/08

Abstract: A method and near field communications (NFC) system for sensing at least one of an environmental condition or a composition of media in a proximity of the NFC system are provided. In the method and system, a first antenna irradiates an electromagnetic field during a sensor mode. A second antenna detects the electromagnetic field and outputs a voltage representative of the detected electromagnetic field. An NFC controller receives a signal representative of the voltage. The NFC controller determines at least one of the environmental condition or the composition of media based on an association stored in memory between the voltage and the at least one of the environmental condition or the composition of media.

公开(公告)号：US11081778B2

公开(公告)日：2021-08-03

申请号：US16123908

申请日：2018-09-06

Applicant: STMicroelectronics, Inc.

Inventor： Pierre Rizzo ,  Christophe Henri Ricard

IPC: G01R29/10 ,  H01Q1/22 ,  G01V3/10 ,  H04B5/00

Abstract: A method and apparatus for performing a low-power presence check are provided. In the method and apparatus, a controller detects a presence of a tag by at least causing the antenna to generate a magnetic field over a first time period for detecting the tag, measuring an antenna voltage over a second time period, causing the antenna to cease generating a magnetic field over a third time period longer than the first time period and comparing the antenna voltage to an antenna reference voltage to determine whether the tag is present. The controller detects the presence of the tag in response to receiving a command from a host device for performing the low-power presence check. The command may be a one-time command for every presence check stage or a command that is repeatedly received each time the controller detects the presence of the tag.

公开(公告)号：US20190097303A1

公开(公告)日：2019-03-28

申请号：US16123908

申请日：2018-09-06

Applicant: STMicroelectronics, Inc.

Inventor： Pierre Rizzo ,  Christophe Henri Ricard

IPC: H01Q1/22 ,  H04B5/00 ,  G01V3/10

Abstract: A method and apparatus for performing a low-power presence check are provided. In the method and apparatus, a controller detects a presence of a tag by at least causing the antenna to generate a magnetic field over a first time period for detecting the tag, measuring an antenna voltage over a second time period, causing the antenna to cease generating a magnetic field over a third time period longer than the first time period and comparing the antenna voltage to an antenna reference voltage to determine whether the tag is present. The controller detects the presence of the tag in response to receiving a command from a host device for performing the low-power presence check. The command may be a one-time command for every presence check stage or a command that is repeatedly received each time the controller detects the presence of the tag.

公开(公告)号：US10284262B1

公开(公告)日：2019-05-07

申请号：US16012514

申请日：2018-06-19

Applicant: STMICROELECTRONICS, INC.

Inventor： Christophe Henri Ricard ,  Mohammad Mazooji

IPC: H04B5/00 ,  H04B5/02 ,  H04L29/08 ,  H04W4/38

Abstract: A method and near field communications (NFC) system for sensing at least one of an environmental condition or a composition of media in a proximity of the NFC system are provided. In the method and system, a first antenna irradiates an electromagnetic field during a sensor mode. A second antenna detects the electromagnetic field and outputs a voltage representative of the detected electromagnetic field. An NFC controller receives a signal representative of the voltage. The NFC controller determines at least one of the environmental condition or the composition of media based on an association stored in memory between the voltage and the at least one of the environmental condition or the composition of media.