Fast and Modular Analog Rank Order Filter Using CMOS Technology

Abstract

In this paper, we apply the sorting network theory to construct an analog rank order filter.We present a voltage mode CMOS two-input sorting element and arrange these to form a rank order filter.The resulting circuit is simple and is a high-speed, high-precision design.Although the transistor count is moderately higher than other designs, the proposed circuit simultaneously outputs signals of all ranks rather than of just one specified rank.We also develop a slightly modified design which calculates the rank of a given signal.We present reports of simulations to verify the performance of the device.