The International Electrotechnical Commission has published the draft of an amendment covering low voltage surge protection devices. The proposed change is titled "Amendment 1 - Low voltage surge protection devices - Performance requirements and testing methods."? This final draft has a voting period February 2, 2008 to April 11, 2008. Purchasers of this draft edition will … [Read more...]
Line of Custom Filters Targets Multiple Applications
A line of custom EMI filters offered by Electrocube provides solutions for unique filter requirements. Complete design engineering and testing capabilities are provided to customers in the military, industrial, electronic, and aerospace industries. Electrocube filters have current carrying capacities of 0.1 amp to 500 amps; voltage ratings of 1 VDC to 5000 VDC; frequencies to … [Read more...]
Filter Connectors Designed with Multilayer Varistor Arrays
Affordable transient protection is now available within electronic connectors. Chris Noade, Syfer Technology Limited, Arminghall, Norwich UK “Connectors contribute nothing to electronic equipment” is an old and contentious statement that raised a few hackles when written, but is now undisputedly outdated and wrong! A modern connector, in isolation, can fulfill the equipment … [Read more...]
Lithium-Zinc Ferrite for the Suppression of Electromagnetic Noise
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...]
