An AC Josephson source for Johnson noise thermometry

Author

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

Author_Institution

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

Volume

52

Issue

2

fYear

2003

fDate

4/1/2003 12:00:00 AM

Firstpage

545

Lastpage

549

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 bias techniques. We describe the waveform synthesis, the bias technique, and the superconducting integrated circuit used to generate the pseudo-noise waveforms.

Keywords

digital-analogue conversion; frequency synthesizers; measurement standards; superconducting integrated circuits; superconducting microwave devices; temperature measurement; thermal noise; waveform generators; AC Josephson source; Johnson noise thermometer system; Johnson noise thermometry; Josephson arbitrary waveform synthesizer; bias electronics; bias technique; bias techniques; cross-correlation electronics calibration; frequency synthesizers; long term stability; low voltage amplitude; pseudo-noise waveforms; quantized voltage noise source; superconducting integrated circuit; superconducting microwave devices; waveform synthesis; Bandwidth; Electrical resistance measurement; Integrated circuit noise; Josephson junctions; Superconducting device noise; Superconducting integrated circuits; Superconducting microwave devices; Synthesizers; Temperature; Voltage;

fLanguage

English

Journal_Title

Instrumentation and Measurement, IEEE Transactions on

Publisher

ieee

ISSN

0018-9456

Type

jour

DOI

10.1109/TIM.2003.811687

Filename

1202094