SciELO - Scientific Electronic Library Online

 
vol.9 número1A Comparison of Dynamic Naive Bayesian Classifiers and Hidden Markov Models for Gesture Recognition índice de autoresíndice de assuntospesquisa de artigos
Home Pagelista alfabética de periódicos  

Journal of applied research and technology

versão impressa ISSN 1665-6423

Resumo

RODRIGUEZ-RODRIGUEZ, J.  e  VELAZQUEZ-HERNANDEZ, J. Nonlinear Companding Circuits With Thermal Compensation to Enhance Input Dynamic Range in Analog Optical Fiber Links. J. appl. res. technol [online]. 2011, vol.9, n.1, pp. 103-111. ISSN 1665-6423.

Measuring systems based on a pair of optical fiber transmitter-receivers are used in medium-voltage testing laboratories wherein the environment of high electromagnetic interference (EMI) is a limitation for using conventional cabling. Nonlinear compensation techniques have been used to limit the voltage range at the input of optical fiber links. However, nonlinear compensation introduces gain and linearity errors caused by thermal drift. This paper presents a method of thermal compensation for the nonlinear circuit used to improve transient signal handling capabilities in measuring system while maintaining low errors in gain and linearity caused by thermal drift.

Palavras-chave : Nonlinear compensation; thermal compensation; optical fiber link; high power testing; input dynamic range.

        · resumo em Espanhol     · texto em Inglês     · pdf em Inglês