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:
May. 09, 2000
Filed:
Jun. 12, 1998
Joshua D Marantz, Cambridge, MA (US);
Charley Selvidge, Wellesley, MA (US);
Ken Crouch, Cambridge, MA (US);
Mark E Seneski, Roslindale, MA (US);
Muralidhar R Kudlugi, Framingham, MA (US);
William K Stewart, Lexington, MA (US);
Ikos Systems, Inc., Cupertino, CA (US);
Abstract
A system and a method provide full visibility to each net of a design under modeling by saving states of the design during modeling and reconstructing waveforms at each net by logic evaluation using the saved states. In one embodiment, primary data input signals and memory output signals ('sample signals') are saved by a logic analyzer, and used in an emulator to generate state vectors from a state snapshot previously recorded. Data compression techniques can be applied to minimize storage requirements, and parallel evaluation of segments of waveforms can be achieved, since saved states for the entire period of interest are available for waveform reconstruction at the time of the logic evaluation.