Kleinschmidt, P; Patel, P; Williams, J M; Janssen, T J B M (2002) Investigation of binary Josephson Arrays for arbitary waveform synthesis. IEE Proc. Sci. Meas. Technol., 149 (6). pp. 313-316.

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Abstract

Arrays of Josephson junctions have been used successfully for many years as the primary standard of voltage. A recent development has been the fabrication of arrays, based on non-hysteretic Josephson junctions, which allows the voltage output to be changed almost instantaneously. When these arrays are divided into binary segments a "digital to analogue converter" with quantum accuracy is created.
The properties of two types of array, a SINIS array, using intrinsic shunting of the Josephson junctions, and s SIS array with external, on-chip resistor shunting have been investigated. The accuracy of the generated voltages and ac properties of the arrays when driven with a purpose built, programmable current bias source are discussed. It is anticipated that a Josephson standard having waveforms with calculable rms values of ac voltage will soon be available.

Item Type:	Article
Keywords:	Josephson arrays, waveform synthesis
Subjects:	Quantum Phenomena
Last Modified:	02 Feb 2018 13:17
URI:	https://eprintspublications.npl.co.uk/id/eprint/2511