Invention Grant
US08458546B2 Oversampled clock and data recovery with extended rate acquisition
有权
超采样时钟和数据恢复,扩展速率采集
- Patent Title: Oversampled clock and data recovery with extended rate acquisition
- Patent Title (中): 超采样时钟和数据恢复,扩展速率采集
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Application No.: US13106040Application Date: 2011-05-12
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Publication No.: US08458546B2Publication Date: 2013-06-04
- Inventor: Mohammad Mobin , Matthew Tota , Gregory Winn
- Applicant: Mohammad Mobin , Matthew Tota , Gregory Winn
- Applicant Address: US CA Milpitas
- Assignee: LSI Corporation
- Current Assignee: LSI Corporation
- Current Assignee Address: US CA Milpitas
- Main IPC: G06F11/00
- IPC: G06F11/00

Abstract:
In described embodiments, a transceiver supports two or more rates using an oversampling clock and data recovery (CDR) circuit sampling high rate data with a predetermined CDR sampling clock. A timing recovery circuit detects and accounts for extra or missing samples when oversampling lower rate data. An edge detector detects each actual data symbol edge and provides for an edge decision offset in a current instant's block of samples. An edge error is generated from the previous instant's actual and calculated edges; and an edge distance between actual edges of the current and previous instants is generated. Filtered edge distance and error are combined to generate a calculated edge position for the data symbol edge for the current instant. The edge decision offset is applied to the current calculated edge position to identify a sample value to generate a decision for the data symbol to detect the current data value.
Public/Granted literature
- US20120290885A1 OVERSAMPLED CLOCK AND DATA RECOVERY WITH EXTENDED RATE ACQUISITION Public/Granted day:2012-11-15
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