Structure > Div. 2 Electricity > 2.1 Direct Current and Low Frequency > 2.12 Ratio and Sampling Techniques > Publications 2.12 > Other applications
Ratio and Sampling Techniques
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Other applications
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Direct Comparison of Josephson Waveforms using an AC Quantum Voltmeter |
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| Author(s): | , , , and |
| Journal: | IEEE Trans. Instrum. Meas. IM-56 |
| Year: | 2007 |
| Volume: | Nr. 2 |
| Pages: | S. 235-238 |
| Abstract: | A new method for calibrating ac voltage waveforms based on measuring the difference relative to a synchronously synthesized waveform supplied from a programmable Josephson array is presented. In order to test the accuracy of this approach, the differences between two Josephson waveforms have been measured at the 1.2-V level for frequencies up to 5 kHz. The uncertainties achieved are at least a factor of ten lower than those from the direct sampling method. Below 400 Hz, this new method gives an uncertainty of 5 10-8 (k = 1), while at 1 kHz, the uncertainty is about 2 107 (k = 1). |
© Physikalisch-Technische Bundesanstalt, last update: 2010-08-10, Thomas Spiegel
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