公开(公告)号：US09124390B2

公开(公告)日：2015-09-01

申请号：US13949101

申请日：2013-07-23

Applicant: RAMBUS INC.

Inventor： Scott C Best ,  Abhijit M Abhyankar ,  Kun-Yung Chang ,  Frank Lambrecht

IPC: G06F1/04 ,  H04L7/00 ,  G11C29/02 ,  G11C29/50 ,  H04L7/033 ,  H04L7/10 ,  H04L25/14

CPC classification number: G06F1/08 ,  G06F1/12 ,  G11C29/02 ,  G11C29/022 ,  G11C29/028 ,  G11C29/50012 ,  H04L7/0004 ,  H04L7/0008 ,  H04L7/0033 ,  H04L7/0091 ,  H04L7/033 ,  H04L7/10 ,  H04L25/14

Abstract: A communication channel includes a first component having a transmitter coupled to a normal signal source, and a second component having a receiver coupled to a normal signal destination. A communication link couples the first and second components. Calibration logic provides for setting an operation value for a parameter of the communication channel, such as by executing an exhaustive calibration sequence at initialization of the link. A tracking circuit, including a monitoring function, tracks drift in the parameter by monitoring a feedback signal that has a characteristic that correlates with drift in the communication channel, and updates, or indicates the need for updating of, the operation value of the parameter in response to the monitoring function.