| Autor: |
Kim, Dan Bee, Kim, Wan-Seop |
| Předmět: |
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| Zdroj: |
IEEE Transactions on Instrumentation & Measurement; 2021, Vol. 70, p1-7, 7p |
| Abstrakt: |
A digitally assisted (DA) coaxial bridge, mainly consisting of a ratio transformer and digital voltage sources, was set up in a four-terminal-pair (4-TP) configuration for precision impedance ratio measurements. A 10:1 capacitance ratio was then measured in the range of 1 pF– $1~ {\mu }\text{F}$ mainly at 1 kHz using the 4-TP DA bridge, and the results were compared to those from the existing two-terminal-pair (2-TP) and three-terminal (3-T) capacitance bridges. The deviations between the capacitance ratio measurements obtained by the different bridges lie from a few parts between 108 and 105, depending on the measurement capabilities of the 2-TP/3-T bridges. Moreover, the measurement frequency of the 4-TP bridge was varied from 50 Hz to 20 kHz, and the frequency dependence of the 10:1 capacitance ratio was studied and compared with the reference ratios. The verification results showed that the existing 2-TP/3-T bridges can be replaced by the new 4-TP DA bridge with an extended measurement range and better uncertainty for capacitance measurements. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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