15 GHz low-voltage-swing carry-lookahead adder

Abstract

We describe a high speed adder that employs a carry-lookahead structure and uses low-voltage-swing pass-transistor-based Manchester carry chain. This structure is implemented in 65 nm technology and accommodates 15 GHz clock frequency at the slowest corner which is 20% higher than the highest speed in the previously studied high-speed structures. © IEICE 2007.