The Schaffner Group AG is relocating its European production activities for EMC components and standard power quality products to Hungary. The focus of activities at the Schaffner Group's Luterbach, Switzerland headquarters will be strategic management, the global innovation center, and other tasks involving global marketing. Schaffner Jacke in Buren, Germany, will continue to … [Read more...]
EMI Causes Washington, DC Metro Trains to Switch to Manual Operation of Doors
The Washington Metropolitan Area Transit Authority has announced that for the immediate future the opening of all doors on its trains will be controlled by train operators. On rare occasions, doors have opened on the wrong side of the car as the train comes to a stop at a station. This problem has occurred as Metro officials have been working to upgrade power substations and … [Read more...]
NextWave Wireless Moves to Sell Its U.S. Spectrum Holdings
Wireless telecom provider, NextWave Wireless, Inc. recently announced that it has retained Deutsche Bank and UBS Investment Bank to explore the sale of its extensive spectrum holdings in the United States. NextWave's U.S. footprint covers more than 251 million people in the United States and includes major markets such as New York, Los Angeles, Chicago, San Francisco, Boston, … [Read more...]
Triple-Output Stepdown Switching Regulator IC Uses Multiphase Switching to Reduce EMI
A new triple-output stepdown switching regulator IC, featuring three high-current outputs that are adjustable from 0.8 V to 5 V with a maximum current of 2 amps, has been introduced by Allegro Microsystems. Operating from an input voltage of 4.5 V to 34 V, the A4490 uses multiphase switching to reduce EMI and to minimize stress on the input capacitors by interleaving the … [Read more...]
Chip Ferrite Beads Provide Effective EMI Suppression
The BLM Series of chip ferrite beads from MuRata Manufacturing has been crafted to function nearly as a resistor at noise frequencies--a characteristic that greatly reduces the possibility of resonance and leaves signal waveforms undistorted. This series is effective in circuits without stable ground lines because it does not need a connection to ground. The nickel barrier … [Read more...]
Miniature Filter Arrays Target Handset Applications
A new family of EMI filter arrays from OnChip Devices comes with onboard ESD protection in various TDFN and uDFN package options. Crafted specifically for high-speed data interfaces in mobile phone, the EMF110x family is offered in 4-channel, 6-channel, and 8-channel filter arrays. They are reported to deliver excellent S21 characteristics with extremely low parasitic … [Read more...]
Catalog Details Wide Line of Shielding Products
A new catalog from Tech-Etch details the company's EMI/RFI shielding product line, including all sizes, shapes, compositions, mounting options, and seal types. This 52-page catalog features to-scale technical drawings, compression values, and metal thicknesses for over 100 BeCu and stainless steel finger stock shielding profiles--including low gasket profiles; soft no-snag … [Read more...]
Spread Spectrum IC Reduces EMI in USB Applications
A USB 2.0 Peak EMI Reduction IC from PulseCore Semiconductor uses spread spectrum technology to achieve compliance in USB applications. The PCS3P73U00A is based on patent-pending technology and is said to simplify EMI reduction while reducing or eliminating the need for expensive metal shielding, ferrite beads, conductive paint, or filtering networks. Spread spectrum clocking … [Read more...]
ISO Amended Standard: Road Vehicles & Electrical Disturbance
The International Standards Organization has published ISO 7837-1 Amd 1: 2008 entitled "Road vehicles - Electrical Disturbance by conduction and coupling - Part 2: Commercial vehicles with nominal 24-V supply voltage - Electrical transient conduction along supply lines only - Amendment 1. This new publication amends ISO 7637-2: 2004. For more information, or to purchase this … [Read more...]
IEC Issues Three New EMC Standards on MV, HV, and EHV Power Supplies
The International Electrotechnical Commission (IEC) has issued three new standards on electromagnetic compatibility-specifically IEC 61000-3-6 Ed. 2.0; IEC 61000-3-7 Ed. 2.0; and IEC 61000-3-13 Ed. 1.0. All deal with the assessment of emission limits. The first 6100-3-6 is a technical report, informative in nature that provides guidance on principles that can be used as the … [Read more...]
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