A new scheme for measuring non-linear distortion coefficient [in voltage measurement]

This paper presents a new scheme for measuring the nonlinear distortion coefficient (NDC) based on the fundamental recovery method; the new scheme is completely accordant with the definition of NDC and eliminates the intrinsic systematic error of the conventional fundamental suppression scheme. Components and key circuits of the new scheme are given in this paper. Results of experiments show that the new scheme is feasible and can be used as the basis for developing new NDC measuring devices