期刊
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
卷 64, 期 6, 页码 1460-1465出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TIM.2015.2401192
关键词
Admittance; bridge circuits; impedance; measurement standards; metrology; precision measurements
资金
- Ministero dell'Istruzione, UniversitA e Ricerca [P4-2011, P6-2012]
- European Metrology Research Programme (EMRP) Project [SIB53]
- EMRP participating countries within EURAMET
- European Union
This paper describes the realization of a two-terminal-pair digital impedance bridge and the test measurements performed with it. The bridge, with a very simple architecture, is based on a commercial two-channel digital signal synthesizer and a synchronous detector. The bridge can perform comparisons between the impedances having arbitrary phase and magnitude ratio. The bridge balance is achieved automatically in less than 1 min. R-C comparisons with calibrated standards, at kilohertz frequencies and 100-k Omega magnitude level, give ratio errors of the order of 10(-6), with potential for further improvements.
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