An Improved SAR Controller for ADDLL Used in DVFS System

An improved successive approximation register (SAR) controller for all digital delay-locked loops (ADDLLs) is proposed to overcome the dead lock problem of the conventional SAR controller by embedding a restarting circuit module into the conventional SAR controller. The ADDLL that adopts the new SAR...

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Published inApplied Mechanics and Materials Vol. 543-547; no. Vehicle, Mechatronics and Information Technologies II; pp. 780 - 783
Main Authors Zheng, Chang Yong, Cai, Zhi Kuang, Chen, Jun Ning, Xu, Tai Long, Tao, You Wu, Fan, Jin
Format Journal Article
LanguageEnglish
Published Zurich Trans Tech Publications Ltd 01.03.2014
Subjects
Approximation
Circuits
Control systems
Frequency variation
Mathematical analysis
Registers
Restarting
Synthetic aperture radar
Dynamic Voltage/Frequency Scaling
All-Digital Delay-Locked Loop
Clock Skew
Successive Approximation Register
Lock Time
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Summary:An improved successive approximation register (SAR) controller for all digital delay-locked loops (ADDLLs) is proposed to overcome the dead lock problem of the conventional SAR controller by embedding a restarting circuit module into the conventional SAR controller. The ADDLL that adopts the new SAR controller can track the operating frequency variation after the first lock-in, keep the advantages of the SAR searching algorithm and satisfy the requirements of DVFS systems.
Bibliography:Selected, peer reviewed papers from the 2014 International Conference on Vehicle & Mechanical Engineering and Information Technology (VMEIT 2014), February 19-20, 2014, Beijing, China
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ISBN:3038350605
9783038350606
ISSN:1660-9336
1662-7482
1662-7482
DOI:10.4028/www.scientific.net/AMM.543-547.780