| Author(s): |
Samuel P. Benz; Paul D. Dresselhaus; Alain Rufenacht; Norman F. Bergren; Joseph R. Kinard; Regis Landim; |
| Title: |
Progress toward a 1 V Pulse-Driven AC Josephson Voltage Standard |
| Published: |
April 01, 2009 |
| Abstract: |
We present a new record rms output voltage of 275 mV, which is a 25 % improvement over the maximum achieved with previous ac Josephson voltage standard (ACJVS) circuits. We demonstrate operating margins for these circuits and use them to measure the harmonic distortion of a commercial digitizer. Having exceeded the threshold of 125 mV rms for a single array of Josephson junctions, we propose and discuss the features of an eight-array circuit capable of achieving 1 V rms. We investigate the use of a resistive-divider to extend the ACJVS voltage accuracy to higher voltages. By use of a switched-input measurement technique, an integrating, sampling digital voltage meter, a resistive voltage divider, and ACJVS synthesized sine waves as reference voltages, we characterize the stability of a commercial calibration source for a few voltages up to 2.7 V. |
| Citation: |
IEEE Transactions on Instrumentation and Measurement |
| Volume: |
58 |
| Issue: |
4 |
| Pages: |
pp. 838 - 843 |
| Keywords: |
Digital-analog conversion; Josephson arrays; quantization; signal synthesis; standards; superconductor-normal-superconductor devices; voltage measurement |
| Research Areas: |
Quantum Electrical Measurements |
| PDF version: |
 Click here to retrieve PDF version of paper (421KB) |
