RESONANCE ANALYSIS OF FIGURE-8 COIL TYPE PERMEANCE METERS

We derived an equivalent circuit for a figure-8 coil type permeance me ter to analyze its LC resonance characteristics. The equivalent circui t for the pickup coils was derived using the same techniques used for thin-film inductors analysis. The driving sheets and twisted lead wire s were modeled according to the theory of distributed constant network s. We made permeance meters, measured the frequency characteristics of the coils' impedances, and demonstrated the validity of the equivalen t circuit used. We also discussed the LC resonance caused by the stray capacitance between the pickup coils and the driving sheets.