Invention Grant
- Patent Title: Adaptive equalization using correlation of edge samples with data patterns
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Application No.: US14159597Application Date: 2014-01-21
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Publication No.: US09054906B2Publication Date: 2015-06-09
- Inventor: Robert E. Palmer
- Applicant: Robert E. Palmer
- Applicant Address: US CA Sunnyvale
- Assignee: Rambus Inc.
- Current Assignee: Rambus Inc.
- Current Assignee Address: US CA Sunnyvale
- Agency: Silicon Edge Law Group LLP
- Agent Arthur J. Behiel
- Main IPC: H04L27/01
- IPC: H04L27/01 ; H04L25/03 ; H04L7/04 ; H04L25/06

Abstract:
An integrated receiver supports adaptive receive equalization. An incoming bit stream is sampled using edge and data clock signals derived from a reference clock signal. A phase detector determines whether the edge and data clock signals are in phase with the incoming data, while some clock recovery circuitry adjusts the edge and data clock signals as required to match their phases to the incoming data. The receiver employs the edge and data samples used to recover the edge and data clock signals to note the locations of zero crossings for one or more selected data patterns. The pattern or patterns may be selected from among those apt to produce the greatest timing error. Equalization settings may then be adjusted to align the zero crossings of the selected data patterns with the recovered edge clock signal.
Public/Granted literature
- US20140233627A1 Adaptive Equalization Using Correlation of Edge Samples with Data Patterns Public/Granted day:2014-08-21
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