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.:
Date of Patent:
Jul. 16, 2013
Filed:
Oct. 25, 2011
Liang Chen, Shanghai, CN;
Yufei LI, Shanghai, CN;
Yong Feng Pan, Shanghai, CN;
Jian Yang, Shanghai, CN;
Liang Chen, Shanghai, CN;
Yufei Li, Shanghai, CN;
Yong Feng Pan, Shanghai, CN;
Jian Yang, Shanghai, CN;
International Business Machines Corporation, Armonk, NY (US);
Abstract
A method and an apparatus for tracking uncertain signals in the simulation of chip design are provided. The method comprises: generating a directed graph which contains sequential logic devices and IO devices from the netlist of chip design, wherein the directed graph illustrates the signal association among the sequential logic devices and IO devices; obtaining the signals related with the sequential logic devices and IO devices from the simulation results, wherein the signals contain a plurality of uncertain signals; and back tracing at least a part of the plurality of uncertain signals along the directed graph to determine the device which firstly generates an uncertain signal. The corresponding apparatus is also provided. With the above method and apparatus, uncertain signals can be traced and their source can be determined, which improves the debugging efficiency.