136 North-Holland, Amsterdam A PACKAGE FOR IMPEDANCE/ADMITTANCE DATA ANALYSIS

An outl ine is given of a Basic computer program which fac i l i ta tes the analysis of frequency dispersion data. With this program an equivalent c i rcu i t, and start ing values for the corres-ponding c i rcu i t parameters, can be extracted from the dispersion data. A c i rcu i t description together with crude parameter values form an essential requirement for a subsequent NLLSF procedure. A br ie f description is given of a frequency dispersion simulation program, also written in Basic, which can be used to compare measured data with a calculated response. Both programs employ the Circuit Description Code (CDC), thus allowing the use of a variety of equivalent c i rcui ts. The use of both programs is demonstrated with the analysis of a dispersion measurement performed on a sample of Sn-doped AgCrS 2, which is a pure ionic conductor. 1