Invention Grant
- Patent Title: Collaborative clock and data recovery
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Application No.: US15799016Application Date: 2017-10-31
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Publication No.: US10348480B2Publication Date: 2019-07-09
- Inventor: Masum Hossain , Nhat Nguyen , Yikui Jen Dong , Arash Zargaran-Yazd
- Applicant: Rambus Inc.
- Applicant Address: US CA Sunnyvale
- Assignee: Rambus Inc.
- Current Assignee: Rambus Inc.
- Current Assignee Address: US CA Sunnyvale
- Agency: The Neudeck Law Firm, LLC
- Main IPC: H04L7/00
- IPC: H04L7/00 ; H04L25/49 ; H03K7/02 ; H03L7/00 ; H04L7/033

Abstract:
A receiver serial data streams generates a local timing reference clock from an approximate frequency reference clock by phase-aligning the local clock to transitions in the data stream. This process is commonly known as clock and data recovery (CDR). Certain transitions of the data signals are selected for use in phase-aligning the local clock, and certain transitions are ignored. Phase-error signals from multiple receivers receiving the multiple serial data streams are combined and used to make common phase adjustments to the frequency reference clock. These common adjustments track jitter that is common to the received data streams. Local adjustments that better align each respective local clock to the transitions of its respective serial data stream are made using a local phase-error signal. These local adjustments track jitter that is more unique to each of the respective serial data streams.
Public/Granted literature
- US20180152284A1 COLLABORATIVE CLOCK AND DATA RECOVERY Public/Granted day:2018-05-31
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