Asymmetric cross-coupled differential pair configuration to realize neuron activation function and its derivative

Gupta, AK and Bhat, N (2005) Asymmetric cross-coupled differential pair configuration to realize neuron activation function and its derivative. In: IEEE Transactions on Circuits and Systems Part II: Analog and Digital Signal Processing, 52 (1). pp. 10-13.

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Abstract

In this brief, we present a new circuit technique to generate the sigmoid neuron activation function (NAF) and its derivative (DNAF). The circuit makes use of transistor asymmetry in cross-coupled differential pair to obtain the derivative. The asymmetry is introduced through external control signal, as and when required. This results in the efficient utilization of the hard-ware by realizing NAF and DNAF using the same building blocks. The operation of the circuit is presented in the subthreshold region for ultra low-power applications. The proposed circuit has been experimentally prototyped and characterized as a proof of concept on the 1.5-mum AMI technology.

Item Type:	Journal Article
Publication:	IEEE Transactions on Circuits and Systems Part II: Analog and Digital Signal Processing
Publisher:	IEEE
Additional Information:	Copyright 2005 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
Department/Centre:	Division of Electrical Sciences > Electrical Communication Engineering
Date Deposited:	28 Apr 2010 06:15
Last Modified:	19 Sep 2010 06:00
URI:	http://eprints.iisc.ac.in/id/eprint/27331

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