The CM1693 EMI filter from California Micro Devices (CMD) is based on a four-pole, inductor-based architecture crafted to meet the emerging high-speed interface requirements of wireless handset applications. Based on the company’s proprietary Praetorian III® EMI filtering technology, the new filter has a two-layer coupled inductor architecture and large value inductances that … [Read more...]
New Ferrite Bead Melds High Current Capacity, Noise Suppression, & Low DC Resistance
The BLM18KG is the latest addition to Murata Electronics BLM Series. Compared to conventional 0603 power beads, the BLM18KG can manage 1.5 to 2 times the rated current and is capable of handling up to 6 amps. These 0603 sized ferrite beads can offer comparable performance to larger more expensive 0805 and 1206 power and wire-wound beads. Another benefit is its DC resistance … [Read more...]
Building a State-of-the-Art 5-Meter Chamber
An efficient shield room for automotive testing progresses from design to finished structure Michael Koffink, Bob Mitchell Intertek ETL Semko Littleton, MA Four years ago, we noticed a growing demand for EMC testing from the automotive industry. As cars and trucks now feature myriad on-board electronic devices, they are increasingly susceptible to stray emissions while … [Read more...]
Lithium-zinc Ferrite for the Suppression of Electromagnetic Noise
Studies show that Li-Zn ferrites can successfully suppress EMI N.C. Joshi, S.S. Islam, Ph.D., Jamia Islamia University Jamia Nagar 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 worldwide … [Read more...]
Understanding Inductance in the Real-world
As soon as current flows through metal conductors, inductance exists Bruce Archambeault, Ph.D., IBM Distinguished Engineer, IBM, Research Triangle Park, NC The concept of inductance is one of the most misunderstood concepts in electrical engineering. Terms such as ‘self inductance’, ‘loop inductance’, ‘partial inductance’, ‘mutual inductance’ are used with little concern … [Read more...]
Enclosure Suppresses EMI in Military Airborne Configurations
A highly ruggedized system enclosure from One Stop Systems (OSS) targets military and airborne applications. Constructed of solid seam-welded aluminum, the 11U high enclosure measures 19″ (H) x 25″ x 17″ (W) and weighs 56 pounds. It contains a 3U 15-slot CPCI backplane and features a “floating card that sits within the enclosure and is surrounded by four banks looped cable … [Read more...]
Murata’s EMI Filter Selection Simulator (Ver. 3.5.0)
Murata’s filter experts have updated their filter selection software. It’s now available in version 3.5.0. This revised and improved package will simulate the effects of EMFIL® and chip capacitors.Learn moreabout this valuable tool; then download 6.1 Mbytes of information formaking the right EMI filter choice. … [Read more...]
More Aerospace Products
High-Voltage Disc Capacitors Suit Aerospace and Industrial ApplicationsThe Cera-Mite 715CxxKT series, a family of single-layer devices from Vishay Intertechnology, are screw-mount disc capacitors offered in a wide range of diameters and capacitance values over rated voltages from 10 k VDC to 40 k VDC. With low AC and DC coefficients and a negligible … [Read more...]
Enclosure Suppresses EMI in Military Airborne Configurations
A highly ruggedized system enclosure from One Stop Systems (OSS) targets military and airborne applications. Constructed of solid seam-welded aluminum, the 11U high enclosure measures 19″ (H) x 25″ x 17″ (W) and weighs 56 pounds. It contains a 3U 15-slot CPCI backplane and features a “floating card that sits within the enclosure and is surrounded by four banks looped cable … [Read more...]
Expanded Filter Family Assures EMC Compliance in High Power Applications
The new FN 3280 from Schaffner has been expanded for use in higher power applications with new sizes including 300 A, 400 A, and 600 A. The new high-performance EMI filters are well suited to use in large industrial machines and plants with numerous motor drives, long motor cables, and high interference levels—as well as inverter and converter applications such as UPS … [Read more...]
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