Multitone Waveform Synthesis With a Quantum Voltage Noise Source

Author

Benz, Samuel P. ; Dresselhaus, Paul D. ; Burroughs, Charles J.

Author_Institution

Nat. Inst. of Stand. & Technol., Boulder, CO, USA

Volume

21

Issue

3

fYear

2011

fDate

6/1/2011 12:00:00 AM

Firstpage

681

Lastpage

686

Abstract

We have developed a quantum voltage noise source (QVNS) based on pulse-driven Josephson arrays and optimized its waveform synthesis for use with Johnson noise thermometry (JNT). The QVNS synthesizes multitone waveforms with equal amplitude harmonic tones and random relative phases in order to characterize the amplitude-frequency response of the analog and digital electronics of the JNT system. We describe the QVNS circuit design and operation, including the lumped-array Josephson-junction circuit and the unipolar bias technique. In particular, we describe the primary design considerations that determine the voltage accuracy of the harmonic tones.

Keywords

circuit noise; digital-analogue conversion; network synthesis; noise measurement; quantum noise; superconducting junction devices; thermometers; waveform analysis; JNT system; Johnson noise thermometry; QVNS circuit design; amplitude-frequency response; analog electronics; digital electronics; digital-analog conversion; equal amplitude harmonic tone; lumped-array Josephson-junction circuit; multitone waveform synthesis; noise measurement; pulse-driven Josephson array; quantum voltage noise source; random relative phase; unipolar bias technique; voltage accuracy; Coplanar waveguides; Harmonic analysis; Junctions; Lead; Noise; Resistors; Temperature measurement; Correlation; Johnson noise; Josephson arrays; digital–analog conversion; noise measurement; quantization; thermometry;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2010.2083616

Filename

5624591