公开(公告)号：EP3829026A1

公开(公告)日：2021-06-02

申请号：EP19315147.9

申请日：2019-11-26

Applicant: STMicroelectronics (Rousset) SAS ,  STMicroelectronics razvoj polprevodnikov d.o.o.

Inventor： Kovacic, Kosta ,  Tramoni, Alexandre

IPC: H02J50/00 ,  H04B5/00

Abstract: The invention relates to a method of dynamic power control of the level of power transmitted by an antenna of a contactless reader device, the method comprising:
- supplying a power to the antenna;
- performing at least one power adjusting cycle (PAC) for adjusting the power level supplied to the antenna during a contactless transaction with a transponder, each power adjusting cycle (PAC) comprising:
o a modifying step (MOD) including modifying the power supplied to the antenna to a predetermined level of power;
o a first measuring step (MES1) including measuring a loading effect, named absolute loading effect, on the antenna at said predetermined level of power; then
o an adjusting step (ADJ) including adjusting the power according to the measured absolute loading effect.

公开(公告)号：EP3637626A1

公开(公告)日：2020-04-15

申请号：EP19199576.0

申请日：2019-09-25

Applicant: STMicroelectronics razvoj polprevodnikov d.o.o. ,  STMICROELECTRONICS SA

Inventor： AGUT, François ,  TROCHUT, Severin ,  KUNC, Vinko

IPC: H04B5/00 ,  H02M3/04

Abstract: The reader, adapted to wirelessly exchanging information with a wireless apparatus, comprises
generating means (GM) configured to generate a modulation signal (MS),
an emitter/receptor stage (5) configured to be driven by said modulation signal (MS), and
a switched-mode power supply (4) configured to power said emitter/receptor stage (5), said switched-mode power supply (4) comprising a power switch (16, 32) controlled in function of said modulation signal (MS).

公开(公告)号：EP4047824A1

公开(公告)日：2022-08-24

申请号：EP21157687.1

申请日：2021-02-17

Applicant: STMicroelectronics Austria GmbH ,  STMicroelectronics razvoj polprevodnikov d.o.o.

Inventor： PATRICIO, Gustavo Jose Henriques ,  STERN, Anton

IPC: H04B5/00 ,  H04L1/00 ,  H04W12/00 ,  H04W12/06 ,  H04L29/06

Abstract: A modified NFC framing is used by a reader (RD) and selected devices (DV2) during at least a part of the communication between the reader and the selected devices (DV2). The reader and the selected devices (DV2) store modification rules for modifying the frames. Devices (DV3) not storing those modification rules will discard the received modified frames.

公开(公告)号：EP3761581A1

公开(公告)日：2021-01-06

申请号：EP19305889.8

申请日：2019-07-01

Applicant: STMicroelectronics (ALPS) SAS ,  STMicroelectronics razvoj polprevodnikov d.o.o. ,  STMICROELECTRONICS SA

Inventor： KOVACIC, Kosta ,  GRUNDRICH, Christophe ,  LEDUC, Bruno ,  STERN, Anton

IPC: H04L27/04 ,  H03C1/62 ,  H03C1/12 ,  H04B5/02 ,  H04B5/00

Abstract: The method for controlling a signal envelope shape of modulation pulses in a driver (TX_DR) of a wireless transmitter (TX), includes:
- supplying a first voltage (VDD_RF) to the driver during a non-modulated state,
- supplying a second voltage (VDD_ASK) configurable by a configurable modulation index value to the driver during a modulated state,
- switching between the non-modulated state and the modulated state comprising setting the modulation index value to configure the second voltage level (VDD ASK) at the same level as the first voltage (VDD_RF) and then switching between supplying the first voltage (VDD_RF) to the driver and supplying the second voltage (VDD ASK) to the driver, and
- filtering to a limited bandwidth the variations of the second voltage resulting from configuring the modulation index value.

公开(公告)号：EP3584949A1

公开(公告)日：2019-12-25

申请号：EP18178585.8

申请日：2018-06-19

Applicant: STMicroelectronics razvoj polprevodnikov d.o.o.

Inventor： STIGLIC, Maksimiljan ,  BRATUZ, Iztok ,  PEVEC, Albin ,  BENKOVIC, Roman

IPC: H04B5/00

Abstract: 1. An integrated circuit having an input configured to receive an induced signal (SIG), said induced signal (SIG) being modulated according to a protocol belonging to the group including protocols using ASK modulation and protocols using OOK modulation, said integrated circuit comprising:
- detection means (DET) configured to detect said modulation;
- decoding means (DEC) configured to detect said protocol.
- a configurable limiter (LIM) configured to limit the level of the induced signal and having a first configuration (MODE1) adapted to protocols using ASK modulation and a second configuration (MODE2) adapted to protocols using OOK modulation;
- control means (CM) configured to set the limiter in said first configuration (MODE1) until protocol is detected, and configured to switch the limiter from said first configuration (MODE1) to said second configuration (MODE2) if a protocol using OOK modulation is detected.

公开(公告)号：EP3413473A1

公开(公告)日：2018-12-12

申请号：EP18174551.4

申请日：2018-05-28

Applicant: STMicroelectronics (Rousset) SAS ,  STMicroelectronics razvoj polprevodnikov d.o.o.

Inventor： TRAMONI, Alexandre ,  CORDIER, Nicolas ,  STIGLIC, Maksimiljan

IPC: H04B5/00 ,  H04W52/00

CPC classification number: H01Q1/002 ,  G01R21/00 ,  G06K7/10 ,  H04B5/0025 ,  H04W52/00

Abstract: Dispositif de communication sans contact, comprenant une antenne (ANT2), des moyens de pilotage (2, D1, D2) possédant une borne d'alimentation (20) destinée a recevoir une tension d'alimentation (Vext) et configurés pour délivrer un courant a destination de l'antenne, et des moyens (MCTRL) de contrôle de la puissance émise par ladite antenne configurés pour, en présence d'une requête de diminution d'un niveau actuel de puissance émise, diminuer la tension d'alimentation (Vext) des moyens de pilotage jusqu'a une valeur cible correspondant a un nouveau niveau de ladite puissance émise inférieur audit niveau actuel.