Quantum waveform synthesizer using Nb/TiN/Nb binary-divided Josephson junction arrays

Author

Williams, Jonathan M. ; Henderson, Dale ; Yamada, Takahiro

Author_Institution

Nat. Phys. Lab., Teddington, UK

fYear

2012

fDate

1-6 July 2012

Firstpage

676

Lastpage

677

Abstract

This paper describes the development of a quantum waveform synthesizer operating at a sampling frequency of 100 kHz with the aim of generating sine waves directly traceable to the Josesphson quantum voltage standard. The quantum reference is based on arrays of 65 536 Josephson junctions, fabricated using Nb/TiN/Nb technology and operating at a bias frequency of 16 GHz corresponding to an output voltage of approximately 2.2 V. The synthesizer contains a specially constructed difference amplifier, digital source and anti-imaging filter. The type A uncertainty is estimated to be 40 nV for a 1s observation time.

Keywords

differential amplifiers; frequency synthesizers; measurement standards; superconducting junction devices; voltage measurement; waveform generators; Josephson junction array; Josesphson quantum voltage standard; antiimaging filter; binary divided Josephson junction array; difference amplifier; frequency 100 kHz; frequency 16 GHz; quantum reference; quantum waveform synthesizer; sine wave generation; time 1 s; voltage 40 nV; Josephson junctions; Junctions; Niobium; Standards; Synthesizers; Tin; Voltage measurement; Josephson effect; measurement standards; measurement uncertainty; precision measurements; signal generators; voltage measurement;

fLanguage

English

Publisher

ieee

Conference_Titel

Precision Electromagnetic Measurements (CPEM), 2012 Conference on

Conference_Location

Washington, DC

ISSN

0589-1485

Print_ISBN

978-1-4673-0439-9

Type

conf

DOI

10.1109/CPEM.2012.6251110

Filename

6251110