An identification procedure of multi-input Wiener models for the distortion analysis of nonlinear circuits

[摘要] In this contribution, a system identification procedure of a two-input Wienermodel suitable for the analysis of the disturbance behavior of integratednonlinear circuits is presented. The identified block model is comprised oftwo linear dynamic and one static nonlinear block, which are determined usingan parameterized approach. In order to characterize the linear blocks, ancorrelation analysis using a white noise input in combination with a modelreduction scheme is adopted. After having characterized the linear blocks,from the output spectrum under single tone excitation at each input a linearset of equations will be set up, whose solution gives the coefficients of thenonlinear block. By this data based black box approach, the distortionbehavior of a nonlinear circuit under the influence of an interfering signalat an arbitrary input port can be determined. Such an interfering signal canbe, for example, an electromagnetic interference signal which conductivelycouples into the port of consideration.

[学科分类] 电子、光学、磁材料