A high performance D-flip flop design with low power clocking system using MTCMOS technique

Abstract

Power consumption plays an important role in any integrated circuit and is listed as one of the top three challenges in International technology roadmap for semiconductors. In any integrated circuit, clock distribution network and flip -flop consumes large amount of power as they make maximum number of internal transitions. In this paper, various techniques for implementing flip-flops with low power clocking system are analyzed. Among those techniques clocked pair shared flip-flop (CPSFF) consume least power than conditional data mapping flip flop (CDMFF), conditional discharge flip flop (CDFF) and conventional double edge triggered flip-flop (DEFF). We propose a novel CPSFF using Multi-Threshold voltage CMOS (MTCMOS) technique which reduces the power consumption by approximately 20% to 70% than the original CPSFF. In addition, to build a clocking system, double edge triggering and low swing clocking can be easily incorporated into the new flip-flop.