We’ve been discussing loops all along and we are still at it. The last post looked at DM, this time it’s back to CM. These loops are the worst -- big – bad – ugly! Finding the loop may be a problem . . . but where there’s current, there’s a loop. The DM loop is easy, typically a differential pair over a ground plane in a high-speed system, the CM is some … [Read more...]
New Spread Spectrum Crystal Oscillator for EMI Reduction
Mercury United, a manufacturer of frequency control products, has released a new spread spectrum crystal oscillator (SSXO) for electromagnetic interference reduction in various electronic products. According to the company, the new oscillator is ideal for applications in printers, hand-held ID readers, medical devices, GPS navigation systems, scanners, projectors and modems. … [Read more...]
Renowned Aerospace Accident Investigator Comments on EMI in FAA's Evaluation of PED Use on Aircraft
In an effort to reevaluate the use of portable electronic devices (PEDs) during flight, the Federal Aviation Administration (FAA) has requested comments from aircraft operators, pilots, PED manufacturers and PED designers on the current regulations in place. Though the FAA notes in their request that some devices do not transmit or receive any signals, they may still generate … [Read more...]
Integrated Circuits for EMI Reduction of Clock Dependent Signals
ON Semiconductor, a supplier of silicon solutions for energy efficient electronics has introduced a new series of active spread spectrum clock generator integrated circuits (ICs) to manage electromagnetic interference (EMI) and radio frequency interference (RFI) and deliver “system-wide EMI reduction of all clock dependent signals.” According to Ryan Cameron, vice president of … [Read more...]
Pennsylvania Voting Machine Malfunction EMI Related?
The recent election night proved to be a test for even the most determined voters. In addition to the long, slow-moving polling lines and the haphazard solutions put hastily into place for hurricane-ravaged areas of the Northeast, voters were also subjected to electronic voting machine malfunctions in several states across the country. In Pennsylvania, a voting machine was … [Read more...]
World's Tallest Broadcast Tower Experiences Interference
The world’s tallest broadcast tower, the 634 meter Tokyo Skytree, has experienced unanticipated radio interference, despite being twice the height of the next tallest tower in Tokyo - Tokyo Tower. The Sky Tree was completed in May 2012. The transfer of radio wave transmission from Tokyo Tower to Tokyo Skytree was originally planned for January 2013 but has been delayed because … [Read more...]
New Research Suggests Monolayer Graphene is Most Effective Material for EMI Shielding
Scientists have discovered that ultra-lightweight carbon nanostructure-based nanocomposite materials outperform conventional metal shielding due to their lighter weight, cost efficiency, flexibility and resistance to corrosion. The research is an attempt to overcome the weight issue of traditional metal-based EMI shielding in electronic devices in order to produce smaller and … [Read more...]
Debate Over Harmful Effects of Radio Waves Continues
Though the level of general concern about possible harmful effects from radio frequency radiation given off by mobile phones, wireless networks and smart meters has decreased in recent years, a small percentage of the population remains convinced that the electromagnetic radiation from wireless technology is dangerous. Patients with one condition, electromagnetic … [Read more...]
New Three-phase EMI Filters Suppress EMI Emissions
LCR Electronics, Inc., a manufacturer of EMI filters and electronic control products, has released the 096C series of filters for high-current three-phase applications. The filters are designed to handle currents from 250 A to 800 A at 50°C (122°F) and are suited for high current applications that include solar and wind power inverters, uninterruptible power supplies (UPS), … [Read more...]
New EMI Test Receiver Reduces Testing Times
Rohde & Schwarz, a provider of equipment for test and measurement, broadcasting, secure communications, radiomonitoring and radiolocation, has released the ESR EMI test receiver for use in EMC certification on commercial equipment, test houses and EMC labs used by electrical equipment manufacturers and their suppliers. The ESR EMI test receiver is available in a 10Hz to … [Read more...]
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