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.

Date of Patent:
Dec. 01, 2020

Filed:

Apr. 29, 2016
Applicant:

Rambus Inc., Sunnyvale, CA (US);

Inventors:

Jared Zerbe, Woodside, CA (US);

Pak Shing Chau, Saratoga, CA (US);

William Franklin Stonecypher, Chapel Hill, NC (US);

Assignee:

Rambus Inc., San Jose, CA (US);

Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04L 1/24 (2006.01); H04L 1/00 (2006.01); H04L 5/14 (2006.01); G01R 31/317 (2006.01); G01R 31/3183 (2006.01); G06F 11/22 (2006.01); G11C 29/02 (2006.01); G11C 29/40 (2006.01); H04B 3/32 (2006.01); H04B 17/00 (2015.01); H04L 25/03 (2006.01); H04B 1/04 (2006.01); H04B 1/16 (2006.01); G01R 31/3185 (2006.01); G01R 31/3187 (2006.01); G06F 13/42 (2006.01); G06F 11/26 (2006.01);
U.S. Cl.
CPC ...
H04L 1/244 (2013.01); G01R 31/3183 (2013.01); G01R 31/31703 (2013.01); G01R 31/31713 (2013.01); G01R 31/31717 (2013.01); G06F 11/221 (2013.01); G11C 29/022 (2013.01); G11C 29/025 (2013.01); G11C 29/40 (2013.01); H04B 1/04 (2013.01); H04B 1/16 (2013.01); H04B 3/32 (2013.01); H04B 17/0085 (2013.01); H04L 1/0001 (2013.01); H04L 1/242 (2013.01); H04L 1/243 (2013.01); H04L 5/1438 (2013.01); H04L 25/03885 (2013.01); G01R 31/3187 (2013.01); G01R 31/31716 (2013.01); G01R 31/31855 (2013.01); G01R 31/318577 (2013.01); G06F 11/26 (2013.01); G06F 13/423 (2013.01); G11C 29/02 (2013.01);
Abstract

A method and apparatus for evaluating and optimizing a signaling system is described. A pattern of test information is generated in a transmit circuit of the system and is transmitted to a receive circuit. A similar pattern of information is generated in the receive circuit and used as a reference. The receive circuit compares the patterns. Any differences between the patterns are observable. In one embodiment, a linear feedback shift register (LFSR) is implemented to produce patterns. An embodiment of the present disclosure may be practiced with various types of signaling systems, including those with single-ended signals and those with differential signals. An embodiment of the present disclosure may be applied to systems communicating a single bit of information on a single conductor at a given time and to systems communicating multiple bits of information on a single conductor simultaneously.


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