Achieving Sub-100-ns Switching of Programmable Josephson Arrays

Author

Williams, Jonathan M. ; Henderson, Dale ; Patel, Pravin ; Behr, Ralf ; Palafox, Luis

Author_Institution

National Phys. Lab.

Volume

56

Issue

2

fYear

2007

fDate

4/1/2007 12:00:00 AM

Firstpage

651

Lastpage

654

Abstract

The accuracy of voltage waveforms, generated using programmable Josephson junction arrays, is limited by the time taken to switch between quantized levels. Relevant parameters are the time constants within the array chip, the characteristics of the cables, and the bandwidth of the bias electronics. A drive system for a 1-V SINIS array with 8192 junctions has been optimized, and a cable scheme has been devised which compensates for cable reflections. The measurements of the array´s temporal response, made with this cable system, are compared to an RC model, both with 3- and 7-ns single time constants

Keywords

superconducting arrays; superconducting cables; superconductor-insulator-superconductor devices; 1 V; 3 ns; 7 ns; RC model; SINIS array; array´s temporal response; cable reflections; cable system; programmable Josephson junction arrays; superconductor-insulator-normal conductor-insulator-superconductor junctions; voltage waveforms; AC generators; Cables; Capacitance; Frequency; Joining processes; Josephson junctions; Laboratories; Superconducting devices; Switches; Voltage; Josephson junction array; temporal response; waveform synthesis;

fLanguage

English

Journal_Title

Instrumentation and Measurement, IEEE Transactions on

Publisher

ieee

ISSN

0018-9456

Type

jour

DOI

10.1109/TIM.2007.891155

Filename

4126882