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:
Jun. 21, 2011
Filed:
Sep. 14, 2007
Craig E. Hampel, San Jose, CA (US);
Richard E. Perego, San Jose, CA (US);
Stefanos S. Sidiropoulos, Palo Alto, CA (US);
Ely K. Tsern, Los Altos, CA (US);
Fredrick A. Ware, Los Altos Hills, CA (US);
Craig E. Hampel, San Jose, CA (US);
Richard E. Perego, San Jose, CA (US);
Stefanos S. Sidiropoulos, Palo Alto, CA (US);
Ely K. Tsern, Los Altos, CA (US);
Fredrick A. Ware, Los Altos Hills, CA (US);
Rambus Inc., Sunnyvale, CA (US);
Abstract
Apparatus and methods are disclosed for adjusting phase of data signals to compensate for phase-offset variations between devices during normal operation. The phase of data signals are adjusted individually in each transmit data unit and receive data unit across multiple data slices with a common set of phase vector clock signals and a corresponding clock cycle count signal. The transmission of signal information between a first device (such as a memory controller) and a second device (such as a memory component) occurs without errors even when the accumulated delays between the first device and second device change by a half symbol time interval or more during operation of the system. The apparatus reduces the circuitry required, such as phase-lock-loops, for individually adjusting the phase of each transmit data unit and receive data unit across multiple data slices, which in turn results in reduction in complexity and cost of the system.