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. 29, 2020
Filed:
Jul. 11, 2019
Applicant:
Rambus Inc., Sunnyvale, CA (US);
Inventors:
Brian S. Leibowitz, San Francisco, CA (US);
Jaeha Kim, Los Altos, CA (US);
Assignee:
Rambus Inc., San Jose, CA (US);
Primary Examiner:
Int. Cl.
CPC ...
H04L 25/03 (2006.01); H03M 1/12 (2006.01); H03M 1/36 (2006.01); H03M 1/00 (2006.01);
U.S. Cl.
CPC ...
H04L 25/03057 (2013.01); H03M 1/123 (2013.01); H03M 1/1245 (2013.01); H04L 25/03146 (2013.01); H04L 25/03885 (2013.01); H03M 1/004 (2013.01); H03M 1/362 (2013.01); H04L 2025/03363 (2013.01); H04L 2025/03369 (2013.01);
Abstract
A decision-feedback equalizer (DFE) samples an analog input signal against M references during the same symbol time to produce M speculative samples. Select logic in the DFE, then decodes N bits resolved previously for previous symbol times to select one of the M speculative samples as the present resolved bit. The present resolved bit is then stored as the most recent previously resolved bit in preparation for the next symbol time. The select logic can be can be programmable to accommodate process, environmental, and systematic variations.