Analysis of Time Constant of Calculable AC/DC Resistors for the Phase Angle Standard
Hiroyuki Fujiki, Atushi Domae, Yasuhiro Nakamura · Japanese Journal of Applied Physics · 2003
The purpose of this work is to investigate the possibility of using calculable ac/dc resistors as a standard of phase angle θ (=ωτ) within an accuracy of a few ppm level at ω=10 4 rad/s. For this purpose, the time constant τ of the bifilar type calculable ac/dc resistor has been analyzed in detail. The results of calculations show that the geometrical and electrical conditions under which the time constant of the bifilar type resistor becomes zero (τ=0) can be obtained within the proper dimension. In this paper, the optimum parameters of the geometrical and electrical conditions which enable the use of calculable ac/dc resistors as a phase angle standard are presented.