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:
Dec. 07, 2010
Filed:
Jan. 29, 2009
Benjamin a Fox, Rochester, MN (US);
William P Hovis, Rochester, MN (US);
Thomas W Liang, Rochester, MN (US);
Paul Rudrud, Rochester, MN (US);
Benjamin A Fox, Rochester, MN (US);
William P Hovis, Rochester, MN (US);
Thomas W Liang, Rochester, MN (US);
Paul Rudrud, Rochester, MN (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A method and system are provided for coupling a DRAM and a memory controller during driver training to reduce mismatches by controlling impedances within the system environment. The memory device, which is typically the device initializing a bit level voltage on a data net, is adjusted through altering what appears to be the reference voltage value to the memory device. A current driven to the memory device is varied in small increments while impedance training is rerun until a desired value is achieved to set the 0 level voltage on the data net.