Bedlington, UK TT electronics Welwyn Components has developed a flameproof high value thick film resistor family with a high working voltage to 10 kV and a resistance value up to 1 GOhm. Designated the GC Series , this resistor family offers the provision of a high resistance bridge across an otherwise isolated barrier, typically to prevent build-up of excessive voltages. Typical applications that would require the barrier resistor performance of the GC Series include antenna-connected equipment such as TVs and set-top boxes and mains-connected capacitor bleed in PFC filters. The GC Series provides adequate terminal spacing to meet clearance and creepage requirements across a wide variety of applications. As a high stability thick film product, the resistor is stringently tested for reaction to severe climatic change and for vibration & bump performance. The GC series resistors are available in values from 47k up to 1G and with tolerances down to 1%. TCRs are available to 100ppm/°C with a power rating of 0.25, 0.5 and 1.0 W at 70°C. LEV rates at 1700 V, 3500 V & 10 kV. Operating temperature range is –55 °C to +155 °C. TT electronics / Welwyn Components Ltd , Bedlington, UK. www.ttelectronics.com.
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.