Clock period optimization technique using multiple clocking domains

The concept of unconstrained clock skew scheduling (CSS) is practically limited due to the difficulties in implementing dedicated clock delays in a reliable manner. This results in a significant limitation of the optimization potential. As an alternative the application of multiple clocking domains with dedicated clock buffer will be implemented. In this paper, an algorithm is proposed for determining the minimum number of clock domains to be used for multi domain clock skew scheduling. The concept of multi domain clock skew scheduling is implemented on the bench mark circuit and the same is applied to digital logic circuit of the telephone answering machine.