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. 08, 2013
Filed:
Jan. 17, 2011
Nahmsuk OH, Goleta, CA (US);
Peivand Fallah-tehrani, Camarillo, CA (US);
Alireza Kasnavl, Sunnyvale, CA (US);
Subramanyam Sripada, Hillsboro, OR (US);
Nahmsuk Oh, Goleta, CA (US);
Peivand Fallah-Tehrani, Camarillo, CA (US);
Alireza Kasnavl, Sunnyvale, CA (US);
Subramanyam Sripada, Hillsboro, OR (US);
Synopsys, Inc., Mountain View, CA (US);
Abstract
A computer-implemented method of determining an attribute of a circuit includes using a computationally expensive technique to simulate the attribute (such as timing delay or slew) of a portion of the circuit, at predetermined values of various parameters (e.g. nominal values of channel length or metal width), to obtain at least a first value of the attribute. The method also uses a computationally inexpensive technique to estimate the same attribute, thereby to obtain at least a second value which is less accurate than the first value. Then the computationally inexpensive technique is repeatedly used on other values of the parameter(s), to obtain a number of additional second values of the attribute. Applying to the additional second values, a function obtained by calibrating the at least one second value to the at least one first value, can yield calibrated estimates very quickly, which represent the attribute's variation relatively accurately.