Electronic analogs of double-junction and single-junction SQUIDs

Publisher Website
Google Scholar
Abstract
We describe electronic analogs of a double-junction (dc) SQUID and a single-junction (rf) SQUID that are simple to construct and operate, and are considerably more flexible than those previously reported. The Josephson junction analog is based on the Resistively-Shunted Junction (RSJ) model, and uses a novel method based on a sample-and-hold circuit to generate the sin ϑ ’’supercurrent.’’ Examples are shown of the single-junction I–V characteristics, threshold curves of critical current vs applied flux and I–V curves for the double-junction SQUID analog, and rf SQUID characteristics as a function of applied flux and rf drive current. Other applications of the analogs, including the incorporation of a nonsinusoidal current-phase relation, are discussed.

This publication has 32 references indexed in Scilit: