A clock signal distribution circuit has a clock tree configuration. In the layout of the clock tree, a standard clock tree is prepared having a route buffer, a plurality of intermediate stage buffer cells and a plurality of last stage buffer cells connected in a hierarchical configuration. All of the clock lines have an equal length. If there are no set of flip-flops ina target integrated circuit corresponding to a set of last stage buffer cells, the set of last stage buffer cells are removed as a whole provided there is not other last stage buffer cells connected to a flip-flop.
* 6487707 LAYOUT DESIGN SYSTEM OF SEMICONDUCTOR IC DEVICE, LAYOUT DESIGN METHOD OF SEMICONDUCTOR IC DEVICE AND COMPUTER-READABLE RECORDING MEDIUM ON WHICH PROGRAMS FOR ALLOWING COMPUTER TO EXECUTE RESPECTIVE MEANS IN THE SYSTEM OR RESPECTIVE STEPS IN THE METHOD ARE RECORDED
* 6564353 Method and apparatus for designing a clock distributing circuit, and computer readable storage medium storing a design program
* 7181709 Clock delay adjusting method of semiconductor integrated circuit device and semiconductor integrated circuit device formed by the method
Please note there is up to 60 days of latency in this Status indicator for certain status conditions. You can obtain up-to-date Status indicator readings by ordering PAIR for the file.
An application with the status "Published" (which means it is pending) may be recently abandoned, but not yet updated to reflect its abandoned status. However, an application filed less than one year ago is unlikely to be abandoned.
A patent with the status "Granted" may be recently expired, but not yet updated to reflect its expired status. However, it is highly unlikely a patent less than 3.5 years old would be expired.
An application with the status "Abandoned" is almost always current, but there is a small chance it was recently revived and the status not yet updated.
This priority date is an estimated earliest
priority date and is purely an estimation. This date should not be
taken as legal conclusion. No representations are made as to the
accuracy of the date listed. Please consult a legal professional
before relying on this date.