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Active and Passive Electronic Components
Volume 2011, Article ID 192818, 9 pages
Research Article

An Analog Template-Based Classifier Using MOS Translinear Loops

Department of Electrical Engineering, Shahid Chamran University of Ahvaz, Ahvaz 61357-831351, Iran

Received 26 January 2011; Revised 14 March 2011; Accepted 15 April 2011

Academic Editor: Sudhanshu Maheshwari

Copyright © 2011 Ebrahim Farshidi. 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.


An analog template matching pattern classifier circuit based on a new synthesis of Euclidean distance calculation is presented. It is composed of simple two-quadrant squarer/divider blocks. The circuit employs MOSFETs that operate in strong inverted saturation region performing electronically simulated translinear loop. The converter features very low supply voltage (0.9 V), immune from body effect, two-quadrant input current, large dynamic range, and low circuit complexity. The circuit was successfully applied to the recognition of some simple patterns. Simulation results by HSPICE show high performance in the separation of circuit and confirm the validity of the proposed technique.