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Interference Technology

For EMI / EMC Engineers

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New Class D Amplifier Solves EMI Issues

 

Silicon Laboratories Inc.’s new class D amplifier effectively mitigates electromagnetic interference, bringing affordable fidelity to consumer audio electronics. The first member of Silicon Labs’ Class D amplifier family, the new Si270x amplifier can be used in a wide range of price- and noise-sensitive consumer audio products, including smart phone docking stations, tabletop … [Read more...]

JEDEC and Tape & Reel Issues

 

  This article is the second part of “The Dip Tube,” which appeared in May in the 2010 Interference Technology EMC Directory & Design Guide. A digital version is available at www.interferencetechnology.com. Over the past several years, both  European- and U.S.-based organizations have sacrificed the traditional “internal auditing process” with over reliance on … [Read more...]

Mains Transients Cause Spurious Switch-on of Toaster, Burns Gas Station Down

 

Transients in the mains supply of a gas station in the USA (called a petrol station in the UK) caused the spurious switch-on a microporcessor-controlled toaster one night after staff had all gone home.  Since the microprocessor wasn't in its normal programme, it didn't switch the toaster off.  The manufacturer of the toaster had omitted to include a thermal fuse, so the gas … [Read more...]

NHTSA Toyota EMI Report due This Month

 

The National Highway Traffic Safety Administration-commissioned study by the National Aeronautics and Space Administration into Toyota’s electronic controls and whether they can be affected by electromagnetic interference is due out later this month.Read more from Consumer Reports. … [Read more...]

Consumer Reports Focuses on EMF Levels in Hybrids

 

Consumer Reports recently conducted a study to measure EMF levels in the hybrid cars in its test fleet, taking readings from five hybrids and eight conventional vehicles. The study found the highest EMF levels in the Chevrolet Cobalt, a conventional non-hybrid small sedan, but the levels were still far below the levels of EMF emitted by the Earth’s own magnetic field. To … [Read more...]

FCC, FDA Promote Investment in Wireless-Enabled Medical Devices

 

Moving forward on recommendations from the National Broadband Plan sent toCongress in March, the leaders of two federal agencies announced a joint effort to help the nation realize the promise that broadband and wireless-enabled medical devices hold for health care in America, while protecting consumer safety.Kicking off a two-day public meeting showcasing a broad range of … [Read more...]

EMC Test Software Marks 15 Years

 

NEXIO’s EMC test software celebrates its 15th birthday at this year’s IEEE EMC symposium. Created in 1995 by a group of EMC experts and programming specialists, BAT EMC is a solution in the aerospace & defense, transport and consumer manufacturing sectors, as well as in accredited labs worldwide. The team at this year’s symposium invites attendees to “put BAT EMC to the … [Read more...]

Engineers Test iPhone 4 Signal-Loss Problems

 

After testing three iPhone 4s in the controlled environment of a radiofrequency isolation chamber, Consumer Reports engineers confirmed that there is a problem with the iPhone 4’s reception. In the RF room, which is impervious to outside radio signals, the test engineers connected the phones to a base-station emulator, a device that simulates carrier cell towers. The engineers … [Read more...]

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