Mansoureh Labafniya - Isfahan University
Mohammadreza Reshadinejhad - Faculty of Computer Engineering, University of Isfahan, Isfahan, Iran
Shahram Etemadi Broujeni - Faculty of Computer Engineering, University of Isfahan, Isfahan, Iran

Adder block is one of the major block in circuit design. inserting efficient adder block will cause having more efficient final design. In this paper improved GDI based adder will be designed. Proposed GDI based adder is more efficient  in delay, performance and PDP. at last an adder/subtractor circuit will be designed.

GDI, Adder, PDP