A current-mode euclidean distance calculator based on electronically simulated translinear principle

In this paper a new synthesis for circuit design of Euclidean distance calculation based on a two-quadrant squarer/divider is presented. The circuit employs MOSFETs that operate in strong inverted saturation region performing electronically simulated translinear loop. The converter features very low supply voltage (0.9 V), immune from body effect, two-quadrant input current, large dynamic range, and low circuit complexity. The circuit was successfully applied to the recognition of some simple patterns. Simulation results by HSPICE show high performance in the separation of circuit and confirm the validity of the proposed technique.