Special Issue Article Open Access

Implementation of Multi-Bit flip-flop for Power Reduction in CMOS Technologies

Abstract

Nowadays Power has become a major concern in low power VLSI design. Achieving low power consumption is a tedious one in IC fabrication industries. In modern integrated circuits, clocking is the most dominating power consuming element. Hence this paper describes a method for reducing the power consumption by replacing some flip-flops with fewer multi-bit flip-flops. We perform a co-ordinate transformation to identify those flip-flops that can be merged and their legal regions. Besides, we show how to build a combination table to enumerate possible combinations of flip-flops provided by a library. Finally, we use a hierarchical way to merge flip-flops. Besides power reduction, the objective of minimizing the total wire length is also considered. This algorithm can reduce clock power and the running time is very short.

K. Siva Prasad, G. Rajesh, V. Thrimurthulu

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