Quasi-one junction SQUIDs as comparators for analog-to-digital conversion

Author

Bradley, P.

Author_Institution

Hypres Inc., Elmsford, NY, USA

Volume

27

Issue

2

fYear

1991

fDate

3/1/1991 12:00:00 AM

Firstpage

2895

Lastpage

2897

Abstract

Comparators based on single junction superconducting quantum interference devices (SQUIDs) have been fabricated and tested. These comparators demonstrate the periodic behavior of multiple junction SQUIDs without the disturbances due to flux mode boundary crossings, promising higher speed. The proper functioning of all components of a full analog-to-digital converter, including the quasi-one-junction-SQUID (QOJS) and the sampling circuit to measure its output, is demonstrated. The only problem observed is that the magnitude of the pulse in the Josephson sampler is too small to measure the full output of the QOJS. This has recently been corrected. Simulations indicate that 4 b of resolution at 10 GHz input bandwidth, or higher resolution at lower bandwidths, should be achievable

Keywords

Josephson effect; SQUIDs; analogue-digital conversion; comparators (circuits); superconducting integrated circuits; 10 GHz; ADC; Josephson sampler; analog-to-digital conversion; comparators; quasi-one-junction-SQUID; sampling circuit; single junction SQUID; superconducting quantum interference devices; Analog-digital conversion; Bandwidth; Circuit simulation; Circuit testing; Interference; Josephson junctions; Pulse measurements; SQUIDs; Sampling methods; Superconducting devices;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.133814

Filename

133814