Browsing by Author "Hsu, Chih-Chiang"

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A High-Performance Low V(MIN) 55nm 512Kb Disturb-Free 8T SRAM with Adaptive VVSS Control
(2011)
Yang, Hao-I
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Yang, Shih-Chi
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Hsia, Mao-Chih
;
Lin, Yung-Wei
;
Lin, Yi-Wei
This paper describes a high-performance low V(MIN) SRAM with a disturb-free 8T cell. The SRAM utilizes single-ended buffer Read, and cross-point data-aware Write Word-Line structure with adaptive VVSS control to eliminate Read disturb and Half-Select disturb, thus facilitating bit-interleaving architecture and achieving low V(MIN). A 512Kb test chip is implemented in UMC 55nm Standard Performance (SP) CMOS technology. The measurement results demonstrate operating frequency of 943MHz at 1.2V VDD and 209MHz at 0.6V VDD.
High-Performance 0.6V V-MIN 55nm 1.0Mb 6T SRAM with Adaptive BL Bleeder
(2012)
Yang, Hao-I
;
Lin, Yi-Wei
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Hsia, Mao-Chih
;
Lin, Geng-Cing
;
Chang, Chi-Shin
This paper presents a 1.0Mb high-performance 0.6V V-MIN 6T SRAM design implemented in UMC 55nm Standard Performance (SP) CMOS technology. This design utilizes an adaptive LBL bleeder technique to reduce Read disturb and Half-Select disturb of 6T cells while maintaining adequate sensing margin. A bleeder timing control circuit adaptively adjusts the LBL voltage level prior to Read/Write operation to facilitate wide operation voltage range. Hierarchical WL, hierarchical BL, and distributed replica timing control scheme are used to improve SRAM performance. Based on measurement results, the SRAM operates from 1.5V down to 0.6V. The maximum operating frequency is 1.517GHz@1.5V and 469MHz@0.7V.
Online Scheduling of Workflow Applications in Grid Environment
(2010)
Hsu, Chih-Chiang
;
Huang, Kuo-Chan
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Wang, Feng-Jian
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資訊工程學系
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Department of Computer Science
Scheduling workflow applications in grid environments is a great challenge, because it is an NP-complete problem. Many heuristic methods have been presented in the literature and most of them deal with a single workflow application at a time. In recent years, there are several heuristic methods proposed to deal with concurrent workflows or online workflows, but they do not work with workflows composed of data-parallel tasks. In this paper, we present an online scheduling approach for multiple mixed-parallel workflows in grid environments. The proposed approach was evaluated with a series of simulation experiments and the results show that the proposed approach delivers good performance and outperforms other methods under various workloads.
Online scheduling of workflow applications in grid environments
(2011-06-01)
Hsu, Chih-Chiang
;
Huang, Kuo-Chan
;
Wang, Feng-Jian
;
資訊工程學系
;
Department of Computer Science
Scheduling workflow applications in grid environments is a great challenge, because it is an NP-complete problem. Many heuristic methods have been presented in the literature and most of them deal with a single workflow application at a time. In recent years, several heuristic methods have been proposed to deal with concurrent workflows or online workflows, but they do not work with workflows composed of data-parallel tasks. In this paper, we present an online scheduling approach for multiple mixed-parallel workflows in grid environments. The proposed approach was evaluated with a series of simulation experiments and the results show that the proposed approach delivers good performance and outperforms other methods under various workloads. (C) 2010 Elsevier B.V. All rights reserved.