Design of Carry Select Adder using BEC and Common Boolean Logic

Carry Select Adder (CSLA) is known to be the fastest adder among the conventional adder structure, which uses multiple narrow adders. CSLA has a great scope of reducing area, power consumption, speed and delay. From the structure of regular CSLA using RCA, it consumes large area and power. This proposed work uses a simple and dynamic Gate Level Implementation which reduces the area, delay, power and speed of the regular CSLA. Based on a modified CSLA using BEC the implementation of 8-b, 16-b, 32-b square root CSLA (SQRT CSLA) architecture have been developed. In order to reduce the area and power consumption in a great way we proposed a design using binary to excess 1 converter (BEC). This paper proposes an dynamic method which replaces a BEC using Common Boolean Logic.

Enhanced and Efficient Carry Select Adder with Minimal Delay

In today’s digital world, Arithmetic computations have been evolved as a core factor in digital signal processors, micro-controllers, and systems using arithmetic and logical operations such as adders, multipliers, image processors, and signal processors. One of the elements that play an important role in performing arithmetic calculations is an adder. Among many adders, the Carry Select Adder produces less propagation delay. However, there may be an increased delay, power consumption, and area required in the case of a normal Carry Select Adder. To overcome the mentioned drawbacks, an improved model of Carry Select Adder has been designed that uses Binary to Excess – 1 Converter. Instead of using multiple blocks of Ripple Carry Adders (RCAs), it is efficient and effective if one of the blocks is replaced with Binary to Excess – 1 Converter. As a result, we can achieve a high speed adder with minimal delay, minimal power, and reduced area.