A 270ps 20mW 108-bit end-around carry adder for multiply-add fused floating point unit

A power and area efficient 108-bit end-around carry adder is implemented using IBM 65nm SOI technology. The adder is used for a multiply-add fused (MAF) floating point unit. Careful balance of the adder structure and structure-aware layout techniques enabled this adder to have a latency of 270ps at power consumption of 20mW with 1V supply. © 2008 Springer Science+Business Media, LLC.