Content Search Quaternary Look-Up Table Architecture

Abstract

Scaling of devices due to reduction in technology has reached to a limit. Such nanoscale devices below certain limit are difficult to fabricate for reasons of physical characteristics, dimensions and cost involved in it. Use of multiple value logic (MVL) is solution to this in terms of cost, area. With use of multi-value logic less number of bits is required to store any information as compared to binary number system. In this work look-up table memory structure is chosen to implement. Radix selected for that is 4, called quaternary logic designs. Look-up table begin faster as compared to conventional memory structure which overcome issue of speed which is a limitation of MVL design. Circuit design for quaternary logic is done using available binary circuits using single power supply. In this design instead of Static RAM a Content based search method is used for design which facilitates searching, matching of data and initialize the next stage of circuit if required. Proposed circuit tries reduction of interconnections in binary systems, without power consumption overhead. This works particularly implements Look-up table memories using content-based search.