Abstract
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 language | English (US) |
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Pages (from-to) | 3822-3824 |
Number of pages | 3 |
Journal | Review of Scientific Instruments |
Volume | 60 |
Issue number | 12 |
DOIs | |
State | Published - Dec 1 1989 |
ASJC Scopus subject areas
- Instrumentation