Analysis of sum-difference converter with high identity of amplitude and phase characteristics

In this paper, a choice of operating diagram of sum-difference converter (SDC) and formed its mathematical model as an oriented graph is presented. Analysis of sum-difference converter is based on using of Mason´s rule for CAD of complex coefficients of its channels, which are then used for converter´s characteristics calculation. The CAD software, which implements Crout algorithm of LU-factorization, is used. We have conducted the analysis of SDC characteristics response to variation of parameters of SDC functional parts and determined the criterion of performing of high identity of amplitude and phase characteristics of SDC channels.