Josephson Arbitrary Waveform Synthesiser 2V (JAWS) primary voltage standard

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NPL is procuring a Josephson Arbitrary Waveform Synthesiser (JAWS) primary voltage standard. This is a series array of Josephson junctions in which single pulses of bias current each generate a small but precisely defined quantised voltage across the array. Accurate voltage waveforms are constructed by fast repetition of the pulses with accurately timed intervals between them. In the JAWS system, the output voltage is always precisely defined. This is in contrast to the Programmable Josephson Voltage Standard (PJVS) in which there are time intervals when the voltage output is not precisely…