Invention Grant
- Patent Title: Apparatus and methods for clock and data recovery
- Patent Title (中): 时钟和数据恢复的装置和方法
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Application No.: US14594472Application Date: 2015-01-12
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Publication No.: US09184909B1Publication Date: 2015-11-10
- Inventor: Stuart McCracken , John Kenney , Kimo Tam
- Applicant: Analog Devices, Inc.
- Applicant Address: US MA Norwood
- Assignee: Analog Devices, Inc.
- Current Assignee: Analog Devices, Inc.
- Current Assignee Address: US MA Norwood
- Agency: Knobbe Martens Olson & Bear LLP
- Main IPC: H04L7/04
- IPC: H04L7/04 ; H04L7/00 ; H04L7/02

Abstract:
Apparatus and methods for clock and data recovery (CDR) are provided herein. In certain configurations, a first CDR circuit captures data and edge samples from a first input data stream received over a first lane. The data and edge samples are used to generate a master phase signal, which is used to control a phase of a first data sampling clock signal used for capturing the data samples. Additionally, the first CDR circuit generates a master phase error signal based on changes to the master phase signal over time, and forwards the master phase error signal to at least a second CDR circuit. The second CDR circuit processes the master phase error signal to generate a slave phase signal used to control a phase of a second data sampling clock signal used for capturing data samples from a second input data stream received over a second lane.
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