EMI Susceptibility Issue in Analog Front-End for Sensor Applications

The susceptibility to electromagnetic interferences of the analog circuits used in the sensor readout front-end is discussed. Analog circuits still play indeed a crucial role in sensor signal acquisition due to the analog nature of sensory signals. The effect of electromagnetic interferences has been simulated and measured in many commercial and integrated analog circuits; the main cause of the electromagnetic susceptibility is investigated and the guidelines to design high EMI immunity circuits are provided

Analysis of sensor disturbances caused by IEMI

Sensors are the link between the digital and the analog world. They can be found in almost all electronic systems and provide the system with access to environmental data. The disturbance of such enviromental data can have serious consequences. For example, an oil pressure sensor on a U.S. Navy ship was disturbed by an RF signal in such a way that a shutdown signal in the automatic power control system was triggerd. Likewise, some early ABS systems in Germany were affected by a radio transmitter in such a way that there were severe problems with the brakes in certain highway sections [3]. Although sensors systems are susceptible to interference, there is insufficient research on the susceptibility of sensors systems to interference. There are studies on the susceptibility of microelectromechanical systems (MEMS) to acoustic signals [7, 8]. However, it was pointed out in [5] that electromagnetic interference is generally not explicitly addressed or even neglected in sensor design. In our previous work [4] we have shown that a MEMS sensor with Inter-Integrated Circuit (I²C) interface can be disturbed by electrical fields. The effects include communication breakdowns, controller crashes, short term and permanent sensor value errors. In [2], similar errors are reported for two other sensors with I²C interface. In this work, we focus on the cause of the observed interference by localizing the interference susceptibility and analyzing the I²C communication. First, the measurement setup and the sensors used are presented in Section 2. The measurement results are shown in Section 3. Finally, in Section 4 we give a short conclusion and an outlook

Electromagnetic Susceptibility of Battery Management Systems' ICs for Electric Vehicles: Experimental Study

The paper deals with the susceptibility to electromagnetic interference (EMI) of battery management systems (BMSs) for Li-ion and lithium-polymer (LiPo) battery packs employed in emerging electric and hybrid electric vehicles. A specific test board was developed to experimentally assess the EMI susceptibility of a BMS front-end integrated circuit by direct power injection (DPI) and radiated susceptibility measurements in an anechoic chamber. Experimental results are discussed in reference to the different setup, highlighting the related EMI-induced failure mechanisms observed during the tests

Susceptibility of Commercial-Off-The-Shelf Sensors to IEMI using Pulse Modulated Signals

The use of sensors has grown dramatically in recent years and many devices rely on the information they provide. The lack of proper security mechanisms available to control the use of sensors and the high degree of integration make them more vulnerable to Intentional Electromagnetic Interference (IEMI). The aim of this paper was to investigate the impact of IEMI on separate sensors with privileged access to the hardware and software to pursue a deep analysis of the effects of IEMI attacks using pulse modulated signals. Measurements were carried out in a shielded hall using an open TEM (Transverse Electromagnetic) waveguide in the 100 MHz–7.5 GHz frequency range. A variety of effects were observed and significant differences were found with pulse modulated signals compared to continuous wave signals. These results indicate weak points in the sensors hardware leading to possible hardening measures.</p

EMI Susceptibility Issue in Analog Front-End for Sensor Applications

The susceptibility to electromagnetic interferences of the analog circuits used in the sensor readout front-end is discussed. Analog circuits still play indeed a crucial role in sensor signal acquisition due to the analog nature of sensory signals. The effect of electromagnetic interferences has been simulated and measured in many commercial and integrated analog circuits; the main cause of the electromagnetic susceptibility is investigated and the guidelines to design high EMI immunity circuits are provided

Electromagnetic Interference and Compatibility

Recent progress in the fields of Electrical and Electronic Engineering has created new application scenarios and new Electromagnetic Compatibility (EMC) challenges, along with novel tools and methodologies to address them. This volume, which collects the contributions published in the “Electromagnetic Interference and Compatibility” Special Issue of MDPI Electronics, provides a vivid picture of current research trends and new developments in the rapidly evolving, broad area of EMC, including contributions on EMC issues in digital communications, power electronics, and analog integrated circuits and sensors, along with signal and power integrity and electromagnetic interference (EMI) suppression properties of materials

Proceedings EMV Kongress 2022 : Internationale Fachmesse und Kongress für Elektromagnetische Verträglichkeit

Proceedings der EMV 202