Design and Simulation of Low Power and Area Efficient SQRT Carry Select Adder with Modified Binary to Excess-1 Converter

Abstract

In the design of Integrated circuits, area occupancy and power consumption plays a vital role because of increasing necessity of portable systems. Carry Select Adder (CSLA) is a fast adder used in data processing processors for performing fast arithmetic functions. From the structure of the CSLA, it is clear that there is scope for reducing the area and power consumption in the CSLA. This work uses a simple and efficient transistor level modification of EX-OR gate used in BEC-1 converter to significantly reduce the area and power of the CSLA. Based on this modification 4, 8, 16-bit SQRT CSLA architecture have been developed and compared with the SQRT CSLA architecture using AND, OR, INVERTER (AOI) implementation of EX- OR gate used in BEC-1 converter. The proposed SQRT CSLA is designed in 130 nm technology. The proposed design has reduced area and power as compared with the SQRT CSLA using ordinary BEC-1 converter. This work evaluates the performance of the proposed designs in terms of area and power. The results analysis shows that the proposed SQRT CSLA structure is better than the regular SQRT CSLA.