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:
Jul. 03, 2007
Filed:
May. 10, 2006
John M. Cohn, Richmond, VT (US);
Leah M. P. Pastel, Essex, VT (US);
Thomas G. Sopchak, Williston, VT (US);
David P. Vallett, Fairfax, VT (US);
John M. Cohn, Richmond, VT (US);
Leah M. P. Pastel, Essex, VT (US);
Thomas G. Sopchak, Williston, VT (US);
David P. Vallett, Fairfax, VT (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
Disclosed is a shielded clock tree that has one or more clock signal buffers and clock signal splitters, with clock signal wiring connecting the clock signal buffers to the clock signal splitters. Shielding is adjacent the clock signal wiring, where ground wiring connects the shielding to ground. The shielding comprises shield wires positioned adjacent and parallel to the clock signal wiring. The invention provides switches in the ground wiring, and these switches are connected to, and controlled by, a test controller.