Studies show that Li-Zn ferrites can successfully suppress EMI. N.C. Joshi and S.S. Islam, Ph.D. Jamia Islamia University, Jamia Nagar, India Anjali Verma, Ph.D. Indian Institute of Technology, New Delhi, India Recent technological development has been characterized by an unprecedented proliferation of digital technology in information and communications equipment. The … [Read more...]
Interference Suppression Using a Balanced MLCC
An innovative capacitor design can provide more RFI suppression in a substantially smaller package. Steve Weir and James Muccioli X2Y Attenuators, LLC, Erie, PA, USA Instrumentation amplifiers are often employed in hostile noise environments. Sensor lead cables may pick up substantial RF radiation, particularly if they are long and/or not well shielded. When applied to the … [Read more...]
Power Quality Effects on the Reliability and Susceptibility of EMI Filters
EMI filter performance plays a critical role in limiting emissions and also impacts the immunity of end-use equipment to electrical disturbances. Philip F. Keebler and Kermit O. Phipps EPRI, Knoxville, Tenn., USA Today, electronic equipment is commonplace in every residential, commercial, and industrial environment. Moreover, this equipment depends on increasingly complex … [Read more...]
Multi-Channel Filter Arrays Feature Ultra-Compact Packaging
EMI filters in ultra-compact LLP leadless packages are available from Vishay Intertechnology. These arrays are the 4-channel VEMI45AA-HNH, the 6-channel VEMI65AA-HCI, and the 8-channel VEMI85AA-HGK. With a low profile of 0.6 mm and a pin-to-pin pitch of 0.4 mm, these VEMI filter arrays have been crafted to conserve board space and to provide EMI/ESD protection in portable … [Read more...]
Interference Suppression Using a Balanced MLCC
An innovative capacitor design can provide more RFI suppression in a substantially smaller package Steve Weir and James Muccioli X2Y Attenuators, LLC Erie, PA Instrumentation amplifiers are often employed in hostile noise environments. Sensor lead cables may pick up substantial RF radiation, particularly if they are long and/or not well shielded. When applied to the input of … [Read more...]
Cost Considerations for Selecting RF Shielding Materials
Taking these factors into account can save time and money. Gary Fenical, Laird Technologies Delaware Water Gap, PA RF shielding materials are an important consideration when designing electronic components because these materials help ensure that the electronic device will perform to its optimum functionality. Considering RF shielding materials at the beginning of the … [Read more...]
Solving Emission Problems with EMI/RFI-Suppressing Connectors
“Swap-in” connectors can be key in meeting tough emission specifications such as EN 55024 and CISPR 24 Dr. William E. Kunz Regal Electronics, Inc. Sunnyvale, California INTRODUCTION With clock frequencies of a few hundred megahertz, today’s electronic systems are using pulse edges in the sub-nanosecond range. Networking interfaces deliver data rates approaching 1000 Mbits/s … [Read more...]
EMC Management and Design in Military and Aerospace Systems—Avoiding the Pitfalls
A systematic approach to EMC engineering and management is the best way of achieving compliance. A.S. De Beer, Ph.D Ruphus Technologies (Pty) Ltd., Lonehill, South Africa ABSTRACT This article focuses on the necessity of following a systematic engineering approach in the design and testing of military and aerospace systems that must comply with stringent EMC Standards. It … [Read more...]
Optimizing EMI Filters Using Circuit Simulation
Simulation saves time, money, and effort in resolving EMI problems in any application. Chris Debraal Curtis Industries Milwaukee, WI The insertion loss of a power line EMI filter can be accurately predicted over a wide range of frequencies through circuit simulation. While analyzing the circuit, it is important to consider test modes and impedances, basic component values, … [Read more...]
EMC Pre-testing Simplifies NEBS Compliance
Introduction NEBS was developed by Bell Labs in the 1970s to standardize equipment that would eventually be installed in a phone company's central office (CO). Sorting out the acronyms, NEBS stands for "Network Equipment-Building System," a term used to describe the environment of a typical Regional Bell Operating Company (RBOC). To get a basic understanding of NEBS, visit … [Read more...]
