Current-mode Euclidean distance circuit independent on technological parameters

Abstract

A new n inputs current-mode Euclidean distance circuit will be presented. For improving the-circuit frequency response, only MOS transistors working in saturation will be used and a current-mode operation of the circuit will be imposed. The circuit output current, which represents the Euclidean distance function, is not dependent on technological parameters, with the result of an important reducing of the circuit errors. The Euclidean distance circuit is designed to be implemented in 0.35mum CMOS technology for n=16 inputs on a die area of about 45mumtimes60mum