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Generation of AC waveforms using a NbN-based programmable Josephson voltage standard system with a 10-K cooler

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6 Author(s)
Maruyama, M. ; Nat. Metrol. Inst. of Japan, AIST, Tsukuba, Japan ; Yamada, T. ; Sasaki, H. ; Yamamori, H.
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We are developing a system for precise AC waveform synthesis in a frequency range below kilo-hertz using a programmable Josephson voltage standard (PJVS). Our PJVS circuit is composed of 65 536 NbN-based over-damped Josephson junctions and operated at a temperature of 9-10 K with a mechanical cooler. We succeeded in generating stepwise-approximated sinusoidal waveforms with peek voltage amplitude of 2 V using a 10-bit PJVS circuit and a bias source with twelve 12-bit digital-to-analog converters. Rough estimations suggest the transient time between each step in the obtained waveforms is less than 5 μs, sufficient for sampling measurements.

Published in:

Precision Electromagnetic Measurements (CPEM), 2010 Conference on

Date of Conference:

13-18 June 2010

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