Piecewise-polynomial associated transform macromodeling algorithm for fast nonlinear circuit simulation

Yang Zhang, Neric Fong, Ngai Wong

Abstract: We present a piecewise-polynomial based associated transform algorithm (PWPAT) for macromodeling nonlinear circuits in system-level circuit design. The generated reduced model can provide both global and local accuracies with the most compact dimension. Numerical examples compare it with existing algorithms and verify its superior accuracy in higher order harmonics simulation over traditional Trajectory Piecewise-Linear (TPWL) approach.