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.

Date of Patent:
Dec. 11, 2007

Filed:

Aug. 14, 2003
Applicants:

Gopinath Rangan, Milpitas, CA (US);

Guy Dupenloup, Redwood City, CA (US);

Wira Gunawan, Santa Clara, CA (US);

Tzung-chin Chang, San Jose, CA (US);

Khai Nguyen, San Jose, CA (US);

Inventors:

Gopinath Rangan, Milpitas, CA (US);

Guy Dupenloup, Redwood City, CA (US);

Wira Gunawan, Santa Clara, CA (US);

Tzung-Chin Chang, San Jose, CA (US);

Khai Nguyen, San Jose, CA (US);

Assignee:

Altera Corporation, San Jose, CA (US);

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

The present invention is directed to reducing errors due to floating values introduced during tristate and contention when modeling a register in RTL. In one embodiment, the floating values are replaced by predetermined desired values corresponding to the floating values which are both stored in a lookup table. In another embodiment, when a floating value is detected, that value is ignored and the previous clock value is retained.


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