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. 01, 2009
Filed:
Mar. 03, 2006
Jared L. Zerbe, Woodside, CA (US);
Bruno W. Garlepp, Austin, TX (US);
Pak S. Chau, San Jose, CA (US);
Kevin S. Donnelly, Los Altos, CA (US);
Mark A. Horowitz, Menlo Park, CA (US);
Stefanos Sidiropoulos, Palo Alto, CA (US);
Billy W. Garrett, Jr., Mountain View, CA (US);
Carl W. Werner, San Jose, CA (US);
Jared L. Zerbe, Woodside, CA (US);
Bruno W. Garlepp, Austin, TX (US);
Pak S. Chau, San Jose, CA (US);
Kevin S. Donnelly, Los Altos, CA (US);
Mark A. Horowitz, Menlo Park, CA (US);
Stefanos Sidiropoulos, Palo Alto, CA (US);
Billy W. Garrett, Jr., Mountain View, CA (US);
Carl W. Werner, San Jose, CA (US);
Rambus Inc., Los Altos, CA (US);
Abstract
A memory system uses multiple pulse amplitude modulation (multi-PAM) output drivers and receivers to send and receive multi-PAM signals. A multi-PAM signal has more than two voltage levels, with each data interval now transmitting a 'symbol' at one of the valid voltage levels. In one embodiment, a symbol represents two or more bits. The multi-PAM output driver drives an output symbol onto a signal line. The output symbol represents at least two bits that include a most significant bit (MSB) and a least significant bit (LSB). The multi-PAM receiver receives the output symbol from the signal line and determines the MSB and the LSB.