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:
Apr. 07, 2009
Filed:
Jun. 29, 2005
Applicants:
Eng H Lee, Penang, MY;
Kok W Loo, Kuala Lumpur, MY;
Assignee:
Altera Corporation, San Jose, CA (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03K 17/16 (2006.01); H03K 19/003 (2006.01); H03K 19/173 (2006.01); H03K 19/094 (2006.01); G06F 7/38 (2006.01); H01H 37/76 (2006.01); H01H 85/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
Methods and circuitry for reducing ground bounce and VCC sag effects in integrated circuit ('IC') devices is provided. In particular, a via-programmable design for I/O circuitry in IC devices is provided. The via-programmable I/O circuitry is used to disconnect I/O pin driver circuitry from and create a substantially direct connection between unused I/O pins and the ground and/or VCC signals of an IC device to reduce ground bounce and VCC sag, respectively.