| Zugriffsnummer | 20862 |
| Dokumenttyp | Konferenzartikel in Zeitschrift |
| Sprache | Englisch |
| Titel | Direct comparison of Josephson waveforms using an ac quantum voltmeter |
| Autor(in); Institution |
Behr, Ralf; 2.6, Elektrische Quantenmetrologie, PTB-Braunschweig
Palafox Gamir, Luis; 2.3, Elektrische Energiemesstechnik, PTB-Braunschweig
Ramm, Günther; 2.1, Gleichstrom und Niederfrequenz, PTB-Braunschweig
Moser, Harald; 2.1, Gleichstrom und Niederfrequenz, PTB-Braunschweig
Melcher, Jürgen; 2.1, Gleichstrom und Niederfrequenz, PTB-Braunschweig
|
| Quelle/Jahr | IEEE Transactions on Instrumentation and Measurement: 56 (2007), 2, 235 - 238 |
| ISSN | 0018-9456 |
| DOI | |
| Verlag | New York, NY: IEEE |
| Konferenzangaben | 2006 Conference on Precision Electromagnetic Measurements, Torino, 9-14, July, 2006, Italy |
| Freie Schlagworte | Josephson arrays ; synchronous sampling ; procedure ; waveform ; synthesis |
| Zusammenfassung | 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 × 10-7 (k = 1). |
