A CMOS-based Analog Function Generator: HSPICE Modeling and Simulation

Abstract

In many Engineering applications, analog circuits present many advantages over their digital counterparts and have recently been particularly used in a wide range of signal processor circuits. In this paper, an analog non-linear function synthesizer is presented based on a polynomial expansion model. The proposed function synthesizer model is based on a 10th order polynomial approximation of any of the required non-linear functions. The polynomial approximations of these functions can then be implemented using basic CMOS circuit blocks. The proposed circuit model can simultaneously synthesize and generate many different mathematical functions. The circuit model is designed and simulated with HSPICE and its performance is demonstrated through the simulation of a number of non-linear functions. DOI: http://dx.doi.org/10.11591/ijece.v4i4.5981