Radial basis function network applied to the linearization of a voltage controlled oscillator

Authors:
Marcio Barbosa Lucks;Nobuo Oki
Affiliations:
IAE - Instituto de Aeronáutica e Espaço, São José dos Campos, Brazil;UNESP Universidade Estadual Paulista, Ilha Solteira, Brazil
Venue:
Proceedings of the 20th annual conference on Integrated circuits and systems design
Year:
2007

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Abstract

An analog circuit that implements a radial basis function network is presented. The proposed circuit allows the adjustment of all shape parameters of the radial functions, i.e., amplitude, center and width. The implemented network was applied to the linearization of a nonlinear circuit, a voltage controlled oscillator (VCO). This application can be classified as an open-loop control in which the network plays the role of the controller. Experimental results have proved the linearization capability of the proposed circuit. Its performance can be improved by using a network with more basis functions.