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An AC Josephson Source for Johnson Noise Thermometry

Published

Author(s)

Samuel Benz, John M. Martinis, Paul Dresselhaus, Sae Woo Nam

Abstract

We have adapted the Josephson arbitrary waveform synthesizer to create a quantized voltage noise source suitable for calibrating the cross-correlation electronics of a Johnson noise thermometer system. The requirements of long term stability and low voltage amplitude allow dramatic simplification of the bias electronics compared to previous circuits. We describe the waveform synthesis, the bias technique and the superconducting integrated circuit used to generate the pseudo-noise waveforms.
Citation
IEEE Transactions on Instrumentation and Measurement
Volume
52
Issue
2

Keywords

digital-analog conversion, frequency synthesizers, Josephson arrays, quantization, signal synthesis, standards, superconducting microwave devices, superconductor-normal-superconductor devices, voltage control

Citation

Benz, S. , Martinis, J. , Dresselhaus, P. and Nam, S. (2003), An AC Josephson Source for Johnson Noise Thermometry, IEEE Transactions on Instrumentation and Measurement, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=30112 (Accessed April 25, 2024)
Created March 31, 2003, Updated October 12, 2021