Synthesis of precision waveforms using a SINIS Josephson junction array

Author

Behr, Ralf ; Williams, Jonathan M. ; Patel, Pravin ; Janssen, Theodoor J B M ; Funck, Torsten ; Klonz, Manfred

Author_Institution

Phys. Tech. Bundesanstalt, Braunschweig, Germany

Volume

54

Issue

2

fYear

2005

fDate

4/1/2005 12:00:00 AM

Firstpage

612

Lastpage

615

Abstract

A synthesizer of precision ac waveforms based on a binary superconductor insulator-normal metal-insulator-superconductor (SINIS) Josephson junction array has been developed. The array segments are individually biased using a high-speed bias source which gives a switching time of approximately 250 ns between voltage steps. The accuracy limitations of the system due to limited risetime and bandwidth are discussed. Comparisons between the synthesizer and a planar multijunction thermal converter (PMJTC) indicate that it is possible to synthesize sine waves with known rms value having an accuracy in the range of 1 part in 10⁷.

Keywords

signal sources; superconductor-insulator-superconductor devices; waveform generators; SINIS Josephson junction array; ac-dc transfer; array segments; binary superconductor insulator-normal metal-insulator-superconductor; digital-analog conversion; high-speed bias source; planar multijunction thermal converter; precision source; precision waveform synthesis; programmable Josephson voltage standard; AC generators; Bandwidth; Binary sequences; Impedance; Insulation; Josephson junctions; Metal-insulator structures; Microwave antenna arrays; Synthesizers; Voltage; AC–DC transfer; digital–analog conversion; precision source; programmable Josephson voltage standard; thermal converter; voltage;

fLanguage

English

Journal_Title

Instrumentation and Measurement, IEEE Transactions on

Publisher

ieee

ISSN

0018-9456

Type

jour

DOI

10.1109/TIM.2004.843084

Filename

1408246