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5G test: Doherty amps measure up

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Doherty amplifiers can improve energy efficiency in 5G basestation transmitters, argue Gareth Lloyd and Patrick Agyapong. Doherty amplifiers, especially those with two independently driven inputs, promise significantly better energy efficiency in 5G basestation transmitters and similar applications. Power amplifiers in basestations constitute 30‑60% of the cost and 20‑60% of the energy consumption of the transmitter infrastructure, so optimal design is ...

Test for safety: Handle with care

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A new standard for audio-visual and ICT equipment spearheads a new hazard-based safety approach, says Clare Glittens. Technological innovation has seen the lines become increasingly blurred between previously distinct technologies. This change means that multimedia products often fall under both IEC 60065 (AV equipment) and IEC 60950-1 (IT equipment). A new standard, IEC 62368‑1:2018 (audio/video, information and communication technology equipment, ...

Embedded World: Arm introduces fourth security element to PSA

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In October 2017, Arm introduced Platform Security Architecture (PSA), a set of hardware, firmware specifications, analysis models an open source firmware reference implementation for a scalable, secure IoT framework. The three initial pillars of analysis (threat and security analysis), architecture specifications for firmware and hardware and an open source implementation, are now joined by a fourth element, PSA Certified for ...

Lidar detects reflections from single atoms at 100km, even in daylight

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Seeking to measure high altitude winds 24 hours a day, the German Leibniz Institute for Atmospheric Physics (IAP) has created a lidar that can measure temperature and wind using returns from stray metals in the atmosphere at concentrations as low as one atom/cm3 100km away, according to German test and measurement firm Spectrum which provided electronics for the instrument. Lasers at ...

Farnell element14 adds 160MHz ARBs from Aim TTi

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Farnell element14 has added  Aim TTi TGF3000 series of dual channel arbitrary function generators to its instrumentation range. The TGF3000 series initially consists of two models, the TG3082 (dual channel, 80MHz, 14 bits / 400MS/s) and TG3162 (dual channel 160MHz, 16 bits / 800MS/s), with two channels that can operate as independent generators or in coupled or tracking modes. Channel ...