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Pulse-Driven Josephson Digital/Analog Converter



Samuel Benz, Clark A. Hamilton, Charles J. Burroughs, Todd E. Harvey, Laurie Christian, J. X. Przybysz


We have designed and demonstrated a pulse-driven Josephson digital/analog converter. When used as a programmable voltage standard, this device can synthesize metrologically accurate ac waveforms as well as stable dc voltages. We show through simulations that Josephson quantization produces a nearly ideal quantization noise spectrum when a junction is driven with a typical waveform produced by a digital code generator. This technique has been demonstrated in preliminary experiments with arrays of 1000 junctions clocked at frequencies up to 12 Gbit/s where sine waves of a few millivolts in amplitude were synthesized at frequencies up to 1 MHz.
IEEE Transactions on Applied Superconductivity


digital/analog converter, frequency synthesis, Josephson junction, superconductivity


Benz, S. , Hamilton, C. , Burroughs, C. , Harvey, T. , Christian, L. and Przybysz, J. (1998), Pulse-Driven Josephson Digital/Analog Converter, IEEE Transactions on Applied Superconductivity (Accessed May 25, 2024)


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Created May 31, 1998, Updated October 12, 2021