Author Archives: steve bush

Isolated gate driver has dual-strength output to vary switching speed

Analog Devices has launched an isolated gate driver with a choice of output strengths for on-the-fly control of mosfet (or IGBT) switching speed. “Previously, the typical solution was to choose a gate driver strength that would enable adherence to electromagnetic regulations at all operating points, meaning systems were often over-engineered and under-utilised,” claimed ADI director ...

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Flat-style electrolytic capacitors offer up to 24,000µF in 3.2mm thick case

Cornell Dubilier has released ‘ultra-flat’ aluminium electrolytic capacitors, intended to replace arrays of surface-mount capacitors. PCB terminations are flat ribbon-lead surface-mount types, whose flexibility allows the body to be mounted remote from the PCB. The bodies are 62 x 42mm, and either 2.2mm (max, ‘DA’ case) or 3.2mm (max, ‘DB’ case). Weight is 17g (DA) or 22g (DB). ...

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Bacteria grows tellurium non-linear optical structures

Bacteria can grow optically-active tellurium nano-rods, according to the University of Houston. Optoelectronic and photonic devices could benefit. The current discovery grew out of 30 years of basic research, stemming from an initial discovery of selenite-respiring bacteria that form discrete packets of elemental selenium. “From there, it was a step down the periodic table to ...

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Atomic demodulator works at 19GHz

Researchers at the US National Institute of Standards and Technology (NIST) have used atoms to decode digital signals encoded by phase modulation. The atoms, cesium in this case, are ‘Rydberg atoms’ – atoms that have been wound up into a high energy state that is extremely sensitive to electric and magnetic fields. In this case the atoms were ...

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GaN mains LED driver chip works up to 110W

Power Integrations has used internal 750V GaN power transistors to add higher power variants to its LYTSwitch-6 family of LED drivers – pushing operation to 110W with 94% conversion efficiency, and no requirement for a heatsink. “The new family members retain existing LYTSwitch-6 benefits such as fast transient response, which facilitates excellent cross regulation for ...

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GaN mains LED driver chip works up to 110W

Power Integrations has used internal 750V GaN power transistors to add higher power variants to its LYTSwitch-6 family of LED drivers – pushing operation to 110W with 94% conversion efficiency, and no requirement for a heatsink. “The new family members retain existing LYTSwitch-6 benefits such as fast transient response, which facilitates excellent cross regulation for ...

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Low-k dielectric for future chips expands in place to fill gaps

Researchers at Leuven University and Belgian research lab Imec have developed a form-in-place low-k dielectric for insulating on-chip interconnect. The technique uses nano-porous metal-organic frameworks. “We’re using metal-organic frameworks as the insulating substance. These are materials that consist of metal ions and organic molecules. Together, they form a crystal that is porous yet sturdy,” said ...

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Red LED streetlights make UK road bat-friendly

Worcestershire County Council has used red LED streetlights to install what it claims is the UK’s first bat-friendly highway – a ~60m stretch of the A4440 near to Warndon Wood nature reserve. “Research shows some species of bat are light shy and will not cross roads lit by white lights, which can stop them accessing ...

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Red LED streetlights make UK road bat-friendly

Worcestershire County Council has used red LED streetlights to install what it claims is the UK’s first bat-friendly highway – a ~60m stretch of the A4440 near to Warndon Wood nature reserve. “Research shows some species of bat are light shy and will not cross roads lit by white lights, which can stop them accessing ...

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Raspberry Pi and Panasonic donate computers to Cameroon school

The Raspberry Pi Foundation and Panasonic Industry Europe have donated 100 Raspberry Pis to the Lycee D’Akwa-Nord Bonamoussadi High School and the University of Science in Douala. In total over 250 pupils – undergraduate, graduate and doctoral students – together with their professors followed the educational and demonstration sessions after the computers were handed over, ...

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