Hanau, Germany Vacuumschmelze GmbH has developed a standard series of common mode chokes with nanocrystalline VITROPERM® cores. In addition to the superior properties at low and medium frequencies these chokes have an optimized performance in the high frequency range. Due to their broadband attenuation characteristic they are particularly suitable for use in switched mode power supplies, solar converters, uninterruptible power supplies or for frequency drives. The series consists of single phase CMC for rated currents from 2 A to 32 A and open, non-moulded 3-phase chokes for rated currents from 6 A to 40 A. The chokes are designed for operating voltages from 250 V or 500 V in compliance with the EN 50178 and EN 60950 safety-related standards. All chokes are manufactured according to the 2002/95/EC ROHS directives. A set of selected common mode standard chokes and nanocrystalline tape-wound cores have been assembled in an EMC kit which is available now. Vacuumschmelze GmbH , Hanau, Germany. www.vacuumschmelze.de.
David Patterson, known for his pioneering research that led to RAID, clusters and more, is part of a team at UC Berkeley that recently made its RISC-V processor architecture an open source hardware offering. We talk with Patterson and one of his colleagues behind the effort about the opportunities they see, what new kinds of designs they hope to enable and what it means for today’s commercial processor giants such as Intel, ARM and Imagination Technologies.