Table of Contents
ISRN Electronics
Volume 2012, Article ID 148492, 5 pages
http://dx.doi.org/10.5402/2012/148492
Research Article

Fully Programmable Gaussian Function Generator Using Floating Gate MOS Transistor

Electronics and Communication Engineering Department, NSIT, New Delhi 110078, India

Received 29 September 2012; Accepted 23 October 2012

Academic Editors: J.-M. Kwon and A. L. P. Rotondaro

Copyright © 2012 Richa Srivastava et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Floating gate MOS (FGMOS) based fully programmable Gaussian function generator is presented. The circuit combines the tunable property of FGMOS transistor, exponential characteristics of MOS transistor in weak inversion, and its square law characteristic in strong inversion region to implement the function. Two-quadrant current mode squarer is the core subcircuit of Gaussian function generator that helps to implement full Gaussian function for positive as well as negative input current. FGMOS implementation of the circuit reduces the current mismatching error and increases the tunability of the circuit. The performance of circuit is verified at 1.8 V in TSMC 0.18 μm CMOS, BSIM3, and Level 49 technology by using Cadence Spectre simulator.