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:
Oct. 03, 1995
Filed:
Oct. 14, 1993
Patrick W Bosshart, Plano, TX (US);
Daniel C Pickens, Garland, TX (US);
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
A simulator system of a digital network which may contain a memory. The system includes at least three hierarchical data storage buffers 18, 20, 24, 26 for storing the simulated network signals for simulated registers and combinatorial logic at the close of each simulation cycle. Each buffer 20, 24, 26 has a plurality of entries comprising a periodic sampling, sometimes referred to as checkpointing, of the next lower storage buffer. The system also includes a change management list 30 and a memory data array 32 for respectively storing time/address pairs and time/value pairs to identify the time, address and value of memory writes. These pairs of data are updated (i.e., checkpointed) each time a selected data storage buffer 24, 26 starts to have previously written locations overwritten by newer data.