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:
Nov. 02, 2004
Filed:
Oct. 31, 2001
Applicant:
Inventors:
Chandrasekhar Thyamagondlu Srinivasaiah, San Jose, CA (US);
Udupi Harisharan, Cupertino, CA (US);
Assignee:
Cisco Technology, Inc., San Jose, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01R 3/128 ;
U.S. Cl.
CPC ...
G01R 3/128 ;
Abstract
A boundary scan cell of a driving integrated circuit transmits an AC signal to a boundary scan cell of a receiving integrated circuit. Both integrated circuits are AC coupled by a capacitor. The transmitted AC signal has a frequency lower than a cut-off frequency of the capacitor. A comparator coupled to the AC signal at the driving IC and the signal at the receiving IC compares both signals and determines whether the capacitor is short-circuited.