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A Constructive Methodology of Analog Synthesis of Nonlinear Functions in Subthreshold CMOS

Signals Systems and Statistics Lab, Department of Telecommunications and Information Technology, University of Tunis El Manar, National Engineering School of Tunis, BP 37, Le Belvédère 1002, Tunis, Tunisia

E-mail Address: lazhar.fekihahmed@enit.rnu.tn

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https://doi.org/10.1142/S0218126621502212Cited by:1 (Source: Crossref)

Abstract

We introduce a clear constructive methodology of approximation and synthesis of analog functions using the transfer characteristics of the basic differential pair. The new methodology provides circuit designers with an easy-to-understand solution of the function approximation problem employing MOSFETs in weak inversion. It further provides compact formulas for the optimal coefficients involved in the approximation. We confirm the design methodology using SPICE through two examples involving the exponential function.

This paper was recommended by Regional Editor Piero Malcovati.

Keywords:

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