公开(公告)号：EP3706333A1

公开(公告)日：2020-09-09

申请号：EP20160868.4

申请日：2020-03-04

Applicant: STMicroelectronics S.r.l.

Inventor： PORTO, Domenico aka Massimo ,  TORRISI, Giovanni Luca ,  TESTONI, Ignazio

IPC: H04B15/04 ,  H04B3/46 ,  H04L12/40

Abstract: A method of compensating electromagnetic emissions of a device (D) for use in a CAN bus (B) is described. The device (D) comprises a CAN transceiver (300) coupling the device (D) to said CAN bus (B) for transmitting and receiving signals. The method comprises:
- transmitting a test signal (TS1) over the CAN bus (B),
- receiving, at the device (D), said test signal after propagation over the CAN bus (B),
- performing frequency analysis processing (OSC2, 304, 306) of the test signal received to detect a set of harmonic components of the test signal received having an amplitude exceeding a certain threshold (V OEM,th ),
- storing (316) respective values of frequency of harmonic components in said set of harmonic components having an amplitude exceeding said certain threshold (V OEM,th ), and
- generating and transmitting over the CAN bus (B) a set of compensation signals, each compensation signal in the set of compensation signals being a sinusoidal signal having a respective frequency equal to one of the frequencies stored, and being in anti-phase with respect to the harmonic component of the test signal received having said respective frequency.

公开(公告)号：EP3920410A1

公开(公告)日：2021-12-08

申请号：EP21305639.3

申请日：2021-05-17

Applicant: STMicroelectronics (ALPS) SAS ,  STMicroelectronics Application GmbH ,  STMicroelectronics S.r.l.

Inventor： OCCHIPINTI, Aldo ,  ROUSSEL, Christophe ,  BURKHARDT, Fritz ,  TESTONI, Ignazio

IPC: H02P29/024 ,  H02P29/028

Abstract: A driver circuit (30) comprises a power supply pin (300) configured to receive a power supply voltage ( V s ), and a set of control pins (302a, 302b, 304a, 304b) configured to provide a set of control signals for controlling the switching activity of a set of switches of an h-bridge circuit. The set of switches of the h-bridge circuit comprises a pair of high-side switches and a pair of low-side switches.
The driver circuit (30) comprises control circuitry (36) coupled (32a, 32b, 34a, 34b) to the control pins (302a, 302b, 304a, 304b) and configured to generate the control signals, and sensing circuitry (38, 360) coupled to the power supply pin (300) and configured to generate a detection signal indicative of said power supply voltage ( V s ) exceeding a threshold value.
The control circuitry (36) is sensitive to the detection signal and is configured to generate said control signals to activate one of said pair of high-side switches and said pair of low-side switches and deactivate the other of said pair of high-side switches and said pair of low-side switches as a result of said detection signal being indicative of said power supply voltage ( V s ) exceeding said threshold value.