| Zugriffsnummer | 33803 |
| Dokumenttyp | Konferenzartikel in Zeitschrift |
| Peer Review | unbekannt |
| Sprache | Englisch |
| Titel | Calculated frequency behavior of the PTB calculable capacitor in audio frequency range |
| Autor(in); Institution |
Homklintian, Monthol; National Institute of Metrology, Pathum Thani, THAILAND
Funck, Torsten; 2.1, Gleichstrom und Niederfrequenz, PTB-Braunschweig
Melcher, Jürgen; 2.1, Gleichstrom und Niederfrequenz, PTB-Braunschweig
Bachmair, Hans; PTB-Braunschweig, retired staff
|
| Quelle/Jahr | IEEE Transactions on Instrumentation and Measurement: 64 (2015), 6, 1600 - 1605 |
| ISSN | 0018-9456 |
| DOI | |
| Verlag | Piscataway, NJ: IEEE |
| Konferenzangaben | Conference on Precision Electromagnetic Measurements (CPEM) 2014, Rio de Janeiro, 24-29, August, 2014, Brazil |
| Freie Schlagworte | calculable capacitor ; frequency dependence ; impedance measurement ; capacitance ; equivalent circuit ; frequency response |
| Zusammenfassung | A determination of the frequency behaviour of the PTB calculable capacitor in the audio frequency range is carried out by applying an equivalent circuit model. The circuit model considers the influence of distributed admittances and impedances within the calculable capacitor and has been derived from the main currents flowing inside the calculable capacitor and the voltage drops caused by these currents. It has been found that the frequency dependence of the cross capacitance is proportional to the square of the frequency, whereby mutual inductances of opposite electrodes and capacitances to ground dominate the behaviour at higher frequencies. At a frequency of 1592 Hz, the correction of the PTB calculable capacitor with a value of 1 pF amounts to 9.2 ×10-8 pF with an expanded uncertainty (k = 2) of 3.1 × 10-8 pF. |
