روشي جديد د رشناسايي رفتار زماني مدارهاي XOR/XNOR بالانس

A Novel Methodology for Timing Behavior Recognition of Balanced XOR-XNOR Circuits

Since, the characteristics of VLSI basic circuits like XORlXNOR which arc the result of single cell simulation setup, are not necessarily defining their behavior in multistage circuits, so reaching to different test methods and more suitable patterns are important issues for investigators in this field. In this paper a new method is proposed in which timing behavior of different circuits can be determined and compared so the result can be used in different structure configurations and large scale circuits. In addition to the new algorithm for designing XORlXNOR balance circuits, two more new circuits have been proposed. By simulation tool, HSPICE, first sizing transistor due to PDP characteristics for circuits has been done and then their timing behaviors have been compared. The optimal circuit due to timing behavior is one of the novel methods. Simulations have been done by O.18/lm technology on the base of BS2M3v model.