Resumo

SANCHEZ-LOPEZ, C; MARTINEZ-ROMERO, E  e  TLELO-CUAUTLE, E. Symbolic Analysis of OTRAs-Based Circuits. J. appl. res. technol [online]. 2011, vol.9, n.1, pp. 69-80. ISSN 1665-6423.

A new nullor-based model to describe the behavior of Operational Transresistance Amplifiers (OTRAs) is introduced. The new model is composed of four nullors and three grounded resistors. As a consequence, standard nodal analysis can be applied to compute fully-symbolic small-signal characteristics of OTRA-based analog circuits, and the nullor-based OTRAs model can be used in CAD tools. In this manner, the fully-symbolic transfer functions of several application circuits, such as filters and oscillators can easily be approximated.

Palavras-chave : Operational Transresistance Amplifier; nullor; nodal analysis.