Abstract
We have developed a programmable Josephson voltage standard based on an array of superconductor–insulator–superconductor junctions. The junctions are damped by an external frequency-dependent shunt circuit, which allows operation at Shapiro steps with n>1. We derive optimization criteria for the design parameters for a fast and stable array with low power consumption. An array able to generate 1.0 VRMS ac voltage signal with sub-ppm accuracy is experimentally demonstrated. Theoretically it is also shown that a fast programmable 10 V array can be realized.
Original language | English |
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Pages (from-to) | 3510-3515 |
Number of pages | 6 |
Journal | Review of Scientific Instruments |
Volume | 74 |
Issue number | 7 |
DOIs | |
Publication status | Published - 2003 |
MoE publication type | A1 Journal article-refereed |
Keywords
- superconductor-insulator-superconductor devices
- measurement standards
- voltage measurement
- superconducting arrays
- superconducting microwave devices
- millimetre wave measurement
- Josephson junction
- Josephson junction arrays