APPLYING THE CONTROLLED ALIASING TECHNIQUE FOR FAST PREDICTION OF THEOUTPUT RESPONSE OF NONLINEAR CIRCUITS DRIVEN BY COMPOSITE SIGNALS

It is assumed that the transfer characteristic of a nonlinear circuit in its severe form is represented by a power series with six terms (fi fth-order nonlinearity) and that the circuit is injected by a composit e signal (arbitrary shape of excitation). An analysis based on the con trolled aliasing technique is carried out to determine the amplitude o f each output harmonic. Results show that this technique is an accurat e CAD tool for analysis of any order of nonlinearity for any form of i nput, with no limitations. CPU-time investigations show that the choic e of the sampling window for both speed of solution and minimisation o f algebraic effort is the critical parameter. A typical CPU time for a nalysis of this severe nonlinearity is 4 min.