Author Archives: steve bush

Fast opto-coupler for automotive

Toshiba is targeting automotive applications with a high-speed analogue-output optocoupler. Comms in electric and hybrid-electric vehicles is the main target. TLX9309 is AEC-Q101 qualified and consists of a GaAlAs LED optically-coupled to a photo-diode backed by an amplifying transistor. By separating the photo-diode and amplification transistor, said the firm, collector capacitance is reduced, cutting  propagation ...

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CMOS op-amp achieves 2.9nV/√Hz and 5μV for sensing

Rohm is aiming at high-accuracy sensing with a low-noise CMOS op-amp. Accelerometers used in sonar systems and optical sensors are potential applications. LMR1802G-LB achieves input equivalent noise of 2.9nV/√Hz at 1kHz, and 7.8nV/√Hz at 10Hz – according to the firm, it created a new differential input stage circuit to get these figures. It also has 68° ...

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Quarter brick hits 1kW and 97% efficiency for telecoms

Murata has announced the 1kW quarter brick dc-dc converter. The fully regulated DRQ-11.4/88-L48xx series provides 11.4V output at 88A, with a Vin Range of 36 to 60Vdc, operating from 48V battery systems or 54V networking equipment. Efficiency peaks at 97%. Developed by Murata Power Solutions to the industry standard DOSA high power 1/4 brick specification, the ...

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Parents must encourage primary school kids to love science and maths

Students should be encouraged to pursue a STEM career while they are of primary school age, according to 50% of STEM professionals responding to a survey by MathWorks, which was intended to reveal reasons behind the UK skill shortage. When asked to consider their own experiences; 40% said they were inspired to love the subjects by ...

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Spray-on process yields quality organic semiconductors

UK scientists have grown high-quality mono-crystals of organic semiconductors, which are large enough to construct FETs on. Such FETs show good clean characteristic curves, although have comparatively low mobility. A common way to create organic semiconductor crystals is to dissolve the material in a solvent, then deposit the solution onto a surface. Subsequent evaporation of ...

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RedRat updates set-top box tester

RedRat of Saffron Walden is to launch a new version of its irNetBox TV set top box testing and monitoring product (earlier version pictured), which will now include a display and navigation panel to simplify installation and improve operational feedback. The display will also show client-specific testing information, such as the type, frequency or duration of ...

RedRat updates set-top box tester

IGBTs optimised for welding

Vishay has introduced IGBT power modules specifically for TIG welding machines. The devices can work up to 1kHz, 600V and 100-400A. There are three half-bridges and on single IGBT, and losses are down on its previous offerings through using ‘Trench PT’ construction: collector-emitter voltages are 1.1-1.3V and turn-off switching energy is 11-45mJ – said to ...

IGBTs optimised for welding

Graphene tunes THz laser

Researchers at the University of Manchester have used a graphene layer to reversibly alter the output of a THz quantum cascade laser. The research, reported in Science, was led by Dr Subhasish Chakraborty and Sir Kostya Novoselov. “Current terahertz devices do not allow for tuneable properties, a new device would have to be made each ...

Graphene tunes THz laser