The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 9727668 B1

PDF
Full Text
Expired
Date of Patent:
Aug. 08, 2017

Filed:

Dec. 31, 2012
Applicant:

Mentor Graphics Corporation, Wilsonville, OR (US);

Inventors:

Sachin Kakkar, Delhi, IN;

John Ries, Wilsonville, OR (US);

Assignee:

Mentor Graphics Corporation, Wilsonville, OR (US);

Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06F 17/50 (2006.01);
U.S. Cl.
CPC ...
G06F 17/5009 (2013.01); G06F 17/5022 (2013.01);
Abstract

Aspects of the present invention are directed to improving the speed of event-driven simulation by manipulating delta delays in a system model to reduce delta cycle executions. The manipulation is performed in a manner that preserves delta cycle accurate timing on selected signals of the system, which may be of interest to a designer. Methods and systems are provided for identifying the signals of interest, and for determining portions of the design that may have delta delays retimed. Preserving the timing on the signals of interest ensures that race conditions and glitches present in the design on the signals of interest are still viewable by the designer. To reduce simulation time, delta delays may be moved from high activity signals to low activity signals, the total number of delta delays may be reduced, or a number of processes executed may be reduced.


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Kakkar, Sachin. (2017). Delta retiming in logic simulation (U.S. Patent No. 9727668). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/9727668

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