Invention Grant
- Patent Title: Method of hierarchical timing closure employing dynamic load-sensitive feedback constraints
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Application No.: US14691599Application Date: 2015-04-21
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Publication No.: US09607124B2Publication Date: 2017-03-28
- Inventor: Adil Bhanji , Kerim Kalafala , Ravichander Ledalla , Debjit Sinha , Chandramouli Visweswariah , Michael H. Wood
- Applicant: International Business Machines Corporation
- Applicant Address: US NY Armonk
- Assignee: International Business Machines Corporation
- Current Assignee: International Business Machines Corporation
- Current Assignee Address: US NY Armonk
- Agent L. Jeffrey Kelly
- Main IPC: G06F17/50
- IPC: G06F17/50

Abstract:
The timing analysis of an integrated chip component using dynamic load sensitive timing feedback constraints maintaining the timing accuracy for all the boundary paths is achieved by capturing a reduced order representation for parasitic load within a component for each of its primary input and primary output along with sensitivities of the arrival time, the slew and the required arrival time to the load representation at the component parent level of hierarchy as part of generating load sensitive feedback constraints. During the out-of-context timing closure of the component, the base load representation and the sensitivities, and an updated load representation enables the calculation of the updated boundary constraint for an accurate timing analysis. The accuracy improvement increases a chip designer productivity during timing closure resulting in a shortened time to take the chip design through timing closure to manufacturing. The method is applicable for deterministic as well as for statistical timing analyses.
Public/Granted literature
- US20160314236A1 Method of Hierarchical Timing Closure Employing Dynamic Load-Sensitive Feedback Constraints Public/Granted day:2016-10-27
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