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:
Sep. 08, 2015
Filed:
May. 08, 2014
International Business Machines Corporation, Armonk, NY (US);
Margaret R. Charlebois, Jericho, VT (US);
Christopher D. Hanudel, Essex Junction, VT (US);
Robert D. Herzl, South Burlington, VT (US);
David W. Milton, Underhill, VT (US);
Clarence R. Ogilvie, Huntington, VT (US);
Paul M. Schanely, Essex Junction, VT (US);
Tad J. Wilder, South Hero, VT (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A performance screen ring oscillator (PSRO) formed from paired scan chains is disclosed. A circuit structure comprises scan chains each having scan chain elements. A scan chain link is configured to pair at least one scan chain element from a first scan chain with at least one scan chain element of a second scan chain to form a PSRO. A forward path associated with data flow through the at least one scan chain element of the first scan chain becomes a backward path of the at least one scan chain element of the second scan chain, and a forward path associated with data flow through the at least one scan chain element of the second scan chain becomes a backward path of the at least one scan chain element of the first scan chain.