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. 26, 2005
Filed:
Oct. 29, 2002
Applicants:
Joseph H. Salmon, Placerville, CA (US);
Hing Y. to, Cupertino, CA (US);
Inventors:
Joseph H. Salmon, Placerville, CA (US);
Hing Y. To, Cupertino, CA (US);
Assignee:
Intel Corporation, Santa Clara, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F003/05 ;
U.S. Cl.
CPC ...
Abstract
Embodiments of the present invention enable the matching of pull-up and pull-down driver strengths of a slave device (DDRII SDRAM), i.e., the P-channel/N-channel driver pull-up/pull-down Ron and also calibrates the P-channel/N-channel pull-up/pull-down drivers in their linear region of operation. Specifically, embodiments of the present invention may use the DDR-II Off Chip Driver (OCD) protocol for calibration, in addition to using circuit techniques to calibrate the slave driver pull-up Ron within 1 LSB of the pull-down Ron.