Programmable Josephson voltage standard circuits using arrays of NbN/TiN/NbN/TiN/NbN double-junction stacks operated at 10 K

Author

Ishizaki, Mayumi ; Yamamori, Hirotake ; Shoji, Akira ; Dresselhaus, Paul D. ; Benz, Samuel P.

Author_Institution

Nat. Inst. of Adv. Ind. Sci. & Technol., Ibaraki, Japan

Volume

54

Issue

2

fYear

2005

fDate

4/1/2005 12:00:00 AM

Firstpage

620

Lastpage

623

Abstract

Programmable Josephson voltage standard (PJVS) circuits using arrays of NbN/TiN/NbN/TiN/NbN double-junction stacks were fabricated and operated at a temperature of 10 K. Four arrays each with 32 768 junctions produced expected voltage outputs when driven at (10, 15, 17, and 20) GHz with an operating current range of 0.2-1.0 mA. Another circuit showed constant-voltage steps at ±6 V when driven with an 11 GHz microwave bias, indicating that over 260 000 junctions were operating properly. This circuit did not show constant-voltage steps when driven with a 19 GHz microwave bias, which was the design frequency to achieve ±10 V output voltage.

Keywords

Josephson effect; measurement standards; niobium compounds; programmable circuits; superconducting junction devices; titanium compounds; voltage measurement; 0.2 to 1.0 mA; 10 GHz; 10 K; 10 V; 15 GHz; 17 GHz; 20 GHz; NbN-TiN; constant-voltage steps; double-junction stacks; microwave bias; programmable Josephson voltage standard circuits; Coplanar waveguides; Equivalent circuits; Frequency; Josephson junctions; Microwave circuits; NIST; Stability; Temperature distribution; Tin; Voltage; Double-junction stack; Josephson junction; microwave; voltage standard;

fLanguage

English

Journal_Title

Instrumentation and Measurement, IEEE Transactions on

Publisher

ieee

ISSN

0018-9456

Type

jour

DOI

10.1109/TIM.2004.843068

Filename

1408248