Digital impedance measurement based on inverse sine function module
- 1 March 1986
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Instrumentation and Measurement
- Vol. IM-35 (1) , 87-88
- https://doi.org/10.1109/TIM.1986.6499062
Abstract
A digital method for the measurement of the real and imaginary parts of the impedance is described, It depends on generating three analog signals. The first is proportional to the voltage (V2) across the unknown impedance, the second is proportional to the current (Iz) through it, and the third is proportional to the phase (θ) between them. These three analog signals are then applied to a simple hybrid circuit that gives digital numbers that are proportional to VzIz, sin θ and VzIz. cos θ, which are equal to the imaginary and real part of the impedance.Keywords
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