A Comprehensive Survey on Distinctive Implementations of Carry Select Adder

VLSI technology is everywhere in digital world. The real applications of VLSI technology are personal computers, cell phones, digital camera or camcorders. The important parameters for these applications are area, operational speed and power consumption. The essential component of latest digital devices is adders. In signal processing adder plays a vital role. We have many kinds of adders. Each adder has its own functionality. To reduce the principal problems i.e., area, operational speedand power consumption, many new adders are invented. Carry select adder (CSLA) is one of the important adder out of the other adders. The propagation delay of carry select adder (CSLA) is better than other adders but the key issue is with its power consumption and area. In this brief, we have reviewed about distinct implementation logics of the carry select adder (CSLA) and the comparative analysis has been done for different types carry select adders (CSLA).