Effect of voltage bias on the dc SQUID characteristics

Authors
Kiviranta, M Seppa, H
Citation
M. Kiviranta et H. Seppa, Effect of voltage bias on the dc SQUID characteristics, J L TEMP PH, 123(1-2), 2001, pp. 127-136
Citations number
11
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
JOURNAL OF LOW TEMPERATURE PHYSICS
ISSN journal
00222291 → ACNP
Volume
123
Issue
1-2
Year of publication
2001
Pages
127 - 136
Database
ISI
SICI code
0022-2291(200104)123:1-2<127:EOVBOT>2.0.ZU;2-2
Abstract
The dynamics of the dc SQUID, when voltage biased through an inductor, is c omputed by numerical simulation and perturbative analytical calculation. We find that the dynamic resistance decreases from its current-biased value a t low bias voltages, where the inductive series reactance no longer separat es the Josephson voltage oscillation from the bias source. the flux-to curr ent conversion ratio, however, remains almost unaffected. This effect is so metimes important in setups, where a second SQUID is usec as a readout ampl ifier.