Determination of non-linear harmonic distortion in SPICE using the Integral Function Method

The nonlinear harmonic distortion is an important feature in the design and analysis of devices and analog integrated circuits. The design process is usually performed using the SPICE type simulation programs. The SPICE programs use different methods, as Fourier analysis and non linearity coefficients, for analysis distortion but in most of the cases the results are not quite good, In this work we present results of applying the recently developed Integral Function Method (IFM) to the analysis of non-linear harmonic distortion of simulated devices in SPICE.