Invention Grant
- Patent Title: Clock and data recovery circuit and system using the same
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Application No.: US14666537Application Date: 2015-03-24
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Publication No.: US09602272B2Publication Date: 2017-03-21
- Inventor: Hyun Bae Lee
- Applicant: SK hynix Inc.
- Applicant Address: KR Icheon-si
- Assignee: SK hynix Inc.
- Current Assignee: SK hynix Inc.
- Current Assignee Address: KR Icheon-si
- Agency: William Park & Associates Ltd.
- Priority: KR10-2014-0174449 20141205
- Main IPC: H04L7/033
- IPC: H04L7/033 ; H03L7/08 ; H04L5/00 ; H03L7/089 ; H03L7/087

Abstract:
A clock and data recovery circuit may include: a phase detection unit configured to generate an early phase detection signal and a late phase detection signal by comparing a clock signal and data; a filtering unit configured to generate an up signal and a down signal based on a number of generation times of the early phase detection signal and a number of generation times of the late phase detection signal; a phase information summing unit configured to receive an output of the filtering unit at each cycle of the clock signal, and generate first and second phase control signals by summing up numbers of the up signals and the down signals received from the filtering unit during a summing-up time; and a phase interpolator configured to adjust a phase of the clock signal according to the first and second phase control signals.
Public/Granted literature
- US20160164667A1 CLOCK AND DATA RECOVERY CIRCUIT AND SYSTEM USING THE SAME Public/Granted day:2016-06-09
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