A compact, bipolar, constant-current-voltage source for superconducting junction characterization

M. Z. Lin*, S. N. Song, B. Y. Jin, J. B. Ketterson

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


A versatile, compact, constant current-voltage, bipolar power source for quasi-static or derivative measurements of the characteristics of superconducting junctions has been developed. The circuitry is based on a negative feedback strategy that is effective in maintaining constant current-voltage behavior at the junction itself and all lead resistances are included in the feedback loop. Constant currents and voltages can be delivered of up to ±0.5 A and ±0.75 V, respectively. Both fast and slow sweeps, as well as a single sweep mode, are available in variable ranges. The single sweep feature is used to avoid heating effects in low resistance junctions which are not in good thermal contact with a thermal reservoir (e.g., liquid 4 He).

Original languageEnglish (US)
Pages (from-to)3822-3824
Number of pages3
JournalReview of Scientific Instruments
Issue number12
StatePublished - Dec 1 1989

ASJC Scopus subject areas

  • Instrumentation


Dive into the research topics of 'A compact, bipolar, constant-current-voltage source for superconducting junction characterization'. Together they form a unique fingerprint.

Cite this