Design of the Efficient Leading Zero Counter

A Leading Zero Counter (LZC) is a digital circuit that determines the number of leading zeros in a binary number, and its design considerations include speed, area, and power consumption. The working of a 64-bit LZC is studied in this paper. The functionality of a 64-bit leading zero counter is investigated through a hierarchical design approach. Starting from a basic 2-bit configuration, the counter's underlying mechanics are analysed and subsequently scaled up to accommodate 64-bit operations. In this paper basic gates such as AND gate, OR gate and inverter are used for implementing leading zero counter. Boolean equations are formed from previously proposed architectures and after simplifying that Boolean expression a new architecture for LZC unit is formed. Further calculation can be performed for a 128-bit leading zero counter. Performance and analysis of the 64-bit LZC can be conducted using this method, and the Xilinx Vivado design suite is utilized to simulate and synthesize the 64-bit leading zero counter