We describe measurements with a pulse-driven Josephson arbitrary waveform synthesizer (JAWS) that uses a ternary arbitrary bit-stream generator as the bias source. This system is meant to be used as an AC Josephson voltage standard (ACJVS). From these measurements we conclude that the system is operational for root-mean-square voltages up to 220 mV. We measured the operating margins for different voltages synthesized with different numbers of junctions, waveforms, and bias conditions. We also present results on the influence of the critical current on the operating margins.
Citation: IEEE Transactions on Instrumentation and Measurement
Pub Type: Journals
Digital-to-analog conversion, Josephson arrays, Signal synthesis, Superconductor-normal-superconductor devices, voltage measurement, AC voltage standard