A new family of electromagnetic interference, low-pass RC Pi filter arrays from OnChip comes with onboard diodes for electrostatic discharge (ESD) protection. These devices are crafted specifically for high-speed data LCD and memory card interfaces in mobile phones, PDAs, and MP3 players. The OC1425 is a 4-channel EMI filter while the EMF4020 and the OC1442 are 8-channel EMI … [Read more...]
IEEE and IEC Expand Agreement for Joint Development of Standards
The Institute of Electrical and Electronics Engineers, Inc. and the International Electrotechnical Commission have agreed to extend their existing cooperation agreement, which describes a procedure for submitting and approving existing IEEE standards to the IEC. Additionally, the two organizations have adopted a procedure that will permit joint, parallel development of a … [Read more...]
Embedded FRAM-LSI Counteracts EMI in Mobile Phones and Other Applications
The MB88R157 from Fujitsu Microelectronics Limited (FML) is an addition to its existing line of spread-spectrum clock generators used to counteract EMI on high-frequency clock signals. This device includes an embedded FRAM (ferroelectric random access memory), which features fast rewriting speed and can vary its frequency output over a range of 1 MHz to 134 MHz while mounted on … [Read more...]
IEC Issues New Interpretation Sheet on EMC Testing and Measurement Techniques
The International Electrotechnical Commission has issued IEC 61000-4-3 (Edition 3.0 – 2008) I-SH 01 entitled, “ Electromagnetic compatibility (EMC) – Radiated, radio frequency, electromagnetic field immunity test.´ Interpretation sheet 1 was prepared by SC 77B: High frequency phenomena, of IEC Technical Committee: Electromagnetic Compatibility. This sheet contains step-by-step … [Read more...]
Vishay Announces Acquisition of Specialty Capacitor Line
Vishay Intertechnology, a global provider of a wide line of electronic components, has announced the acquisition of a specialty wet tantalum capacitor line from KEMET Corporation for $35.2 and other consideration in the form of a three-year term loan of $15 million. Closing was scheduled to occur by the close of business on Monday, May 15, 2008. Dr. Felix Zandman, Executive … [Read more...]
EPRI Launches Controversial Project of Updating NIEHS Booklet on EM Exposure
The Electric Power Research Institute (EPRI), a non-profit industry organization representing electric utility companies, has stirred controversy by launching a project that would fund an update and reissue of a booklet from the National Institute of Environmental Health Sciences (NIEHS), a branch of the National Institutes of Health. This booklet “Electric and Magnetic Fields … [Read more...]
German Metrology Institute Cites EMI Impact on Measurement Systems
The German Metrology Institute, or Physikalisch-Technische Bundesanstalt (PTB), has posted an article detailing the impact of electromagnetic interference on modern measurement systems. This article also includes an announcement of a portable device that it has developed to solve this problem. The gist of this article includes two well known facts. First, we no longer rely on … [Read more...]
Thin-Film Common Mode Filter Targets Use in DisplayPort
The new TCM1210U500-2P from TDK Corporation is a wideband, thin-film, common-mode filter for EMI suppression in DisplayPort interfaces. This new filter works as an EMI countermeasure on high-speed data transmission lines in notebook computers, audio-visual equipment, and other electronic devices. With dimensions of 1.2 mm (L) x 1.0 mm (W) x 0.6 mm (H), this product has been … [Read more...]
Film Capacitors Provide Compact Link Circuit Solution
Space-saving MKP link circuit capacitors of the DC Link HD Series (B3277) from EPCOS are now available for compact frequency converters in the power class up to about 40 kW. These high capacitance density, self-healing capacitors cover the voltage range from 450 to 1300 VDC and are available with capacitance values of between 1.5 and 110 µF. With their low ESR (3.0 mΩ) and … [Read more...]
Patent Pending Spread Spectrum Clock Generator Reduces EMI
The SLG4421 from Silego Technology is a 1x multiplier spread spectrum clock generator (SSCG) featuring the industry’s widest frequency range of 24 MHz to 200 MHz, lowest current consumption and FrequencyAwareTM capability. FrequencyAwareTM is a proprietary technology pioneered by Silego that automatically determines the input frequency thus eliminating the need for input … [Read more...]
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