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| 1 | Time-domain analysis methodology for large-scale RLC circuits and its applications显示文摘With soaring work frequency and decreasing feature sizes, VLSI circuits with RLC parasitic components are more like analog circuits and should be carefully analyzed in physical design. However, the number of extracted RLC components is typically too large to be analyzed efficiently by using present analog circuit simulators like SPICE. In order to speedup the simulations without error penalty, this paper proposes a novel methodology to compress the time-descritized circuits resulted from numerical integration approximation at every time step. The main contribution of the methodology is the efficient structure-level compression of DC circuits containing many current sources, which is an important complement to present circuit analysis theory. The methodology consists of the following parts: 1) An approach is proposed to delete all intermediate nodes of RL branches. 2) An efficient approach is proposed to compress and back-solve parallel and serial branches so that it is error-free and of linear complexity to analyze circuits of tree topology. 3) The Y toπtransformation method is used to error-free reduce and back-solve the intermediate nodes of ladder circuits with the linear complexity. Thus, the whole simulation method is very accurate and of linear complexity to analyze circuits of chain topology. Based on the methodology, we propose several novel algorithms for efficiently solving RLC-model transient power/ground (P/G) networks. Among them, EQU-ADI algorithm of linear-complexity is proposed to solve RLC P/G networks with mesh-tree or mesh-chain topologies. Experimental results show that the proposed method is at least two orders of magnitude faster than SPICE while it can scale linearly in both time- and memory-complexity to solve very large P/G networks. | LUO Zuying CAI Yici Sheldon X.-D Tan HONG Xianlong WANG Xiaoyi PAN Zhu FU Jingjing | 2006 | Science in China(Series F)2006，49，5： | 13 |
| 2 | Efficient statistical analysis method of power/ground (P/G) network显示文摘In this paper,we propose an incremental statistical analysis method with complexity reduction as a pre-process for on-chip power/ ground (P/G) networks. The new method exploits locality of P/G network analyses and aims at P/G networks with a large number of strongly connected subcircuits (called strong connects) such as trees and chains. The method consists of three steps. First it compresses P/ G circuits by removing strong connects. As a result,current variations (CVs) of nodes in strong connects are transferred to some remain-ing nodes. Then based on the locality of power grid voltage responses to its current inputs,it effciently calculates the correlative resistor (CR) matrix in a local way to directly compute the voltage variations by using small parts of the remaining circuit. Last it statistically recovers voltage variations of the suppressed nodes inside strong connects. This new method for statistically compressing and expanding strong connects in terms of current or voltage variations in a closed form is very effcient owning to its property of incremental analysis. Experimental results demonstrate that the method can effciently compute low-bounds of voltage variations for P/G networks and it has two or three orders of magnitudes speedup over the traditional Monte-Carlo-based simulation method,with only 2.0% accuracy loss. | Zuying Luo Sheldon X.D. Tan | 2008 | Progress in Natural Science:Materials International2008，18，2： | 5 |
| 3 | Localized relaxation theory of circuits and its applications in electro-thermal analyses显示文摘In the high-performance IC design with increasing design complexity,it is a very important design content to efficiently analyze IC parameters.Thus,the electro-thermal (ET) analyses including power/ground (P/G) analysis and thermal analysis are hot topics in today's IC research.Since ET analysis equation has a sparse,positive definite and strictly diagonally dominant coefficient-matrix,we prove that the ET analysis has the advantage of locality.Owing to this advantage,localized relaxation method is formally proposed,which has the same accuracy as the global relaxation done with the constraint of the same truncation error limitation.Based on the localized relaxation theory,an efficient and practical localized successive over-relaxation algorithm (LSOR2) is introduced and applied to solve the following three ET analysis problems.(1) Single-node statistical voltage analysis for over-IR-drop nodes in P/G networks;(2) single-node statistical temperature analysis for hot spots in 3D thermal analysis;(3) fast single open-defect analysis for P/G networks.A large amount of experimental data demonstrates that compared with the global successive over-relaxation (SOR) algorithm,LSOR2 can speed up 1-2 orders of magnitudes with the same accuracy in ET analyses. | LUO ZuYing ZHAO GuoXing GORDON Joseph A. TAN Sheldon X.-D. | 2012 | Science China(Information Sciences)2012，55，4： | 1 |
| 4 | Trigger System for γ-ray Total Absorption BaF2 Facility显示文摘The γ-ray total absorption facility(GTAF)is designed to measure the cross-sections of theneutron radioactive capture reactions by online method,in which the data acquisition system is developed based on the flash analog-to-digital converter(FADC).The digital total waveform acquisition method is used.The trigger | HE Guozhu PENG Meng SHI Bin ZHANG Qiwei LUO Hong BAO Jie LI Xia RUAN Xichao NIE Yangbo HUANG Hanxiong REN Jie ZHOU Zuying TANG Hongqing | 2017 | Annual Report of China Institute of Atomic Energy2017，，1： | 0 |
| 5 | Efficient Pre-conditional Single-Node SOR Method of Statistical 3D Thermal Analysis for Hot Spots显示文摘 | LUO Zuying ZHAO Guoxing FAN Jeffrey TAN Sheldon X.D. | 2012 | Chinese Journal of Electronics2012，21，1： | 0 |
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