| 摘要 |
Buffers on a clock tree are reduced, as long as there is enough set-up margin, in order to reduce power consumption in the clock tree. An FF group coupled to a partial tree, which is a part of the clock tree and expanded from the branch point being focused on, is defined as the target FF and the other FFs are defined as non-target FFs. The target buffer of an elimination candidate and the target and non-target FFs are defined so as not to change the slack in principle in a signal propagation path between the non-target FFs even if the buffer is eliminated. The buffer which can be eliminated is specified within a range in each signal propagation path which has a start point at the non-target FF and an end point at the target FF and in each signal propagation path between the target FFs.
|
