Title :
Error analysis in two-terminal impedance measurements with residual correction
Author :
Torrents, Josep M. ; Pallàs-Areny, Ramon
Author_Institution :
Dept. of Electron. Eng., Tech. Univ. of Catalonia, Barcelona, Spain
Abstract :
Residual impedance correction in impedance analyzers when using an asymmetrical test fixture needs three reference measurements, usually open circuit, short circuit, and load (meaning impedance close to the impedance under test). This paper provides an error estimate for impedance measurements that apply a simple open/short correction in spite of using an asymmetrical test fixture. Experimental results show that the minimal error is obtained for impedance values close to the geometric mean of the short-circuit and open-circuit impedances, and that the theoretical prediction is indeed an upper limit for the actual error.
Keywords :
electric impedance measurement; error analysis; asymmetrical test fixture; error analysis; error estimation; impedance analyzers; impedance measurements; open-circuit impedances; open/short correction; reference measurements; residual impedance correction; short-circuit impedance; Cables; Circuit testing; Current measurement; Electric variables measurement; Error analysis; Error correction; Fixtures; Gain measurement; Impedance measurement; Joining processes; Error analysis; impedance measurements; residual correction;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
DOI :
10.1109/TIM.2005.853671