Method and apparatus for distributing a clock tree within a hier

Details Method and apparatus for distributing a clock tree within a hier Method and apparatus for distributing a clock tree within a hier

1997-01-22

1999-06-15

Teska, Kevin J.

Boots, shoes, and leggings

364490, 364491, G06F 1750

Patent

active

059128208

ABSTRACT:
A method and apparatus for distributing clock drivers within a hierarchical circuit design, wherein the clock drivers are concentrated in locations where they are actually needed rather than uniformly distributed throughout the circuit design. In an exemplary embodiment, the actual clock loads within a selected hierarchical region are determined, and a sufficient number of clock drivers are added as children objects to the selected hierarchical region. Since many placement tools may place the children objects within an outer boundary of the corresponding parent object, the clock drivers, as children objects of the selected hierarchical region, may be placed within the outer boundary of the selected hierarchical region. Accordingly, the clock drivers may be concentrated in the locations where actually needed.

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