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    National Tsing Hua University Institutional Repository > 電機資訊學院 > 資訊工程學系 > 期刊論文 >  Channel density reduction by routing over the cells


    Please use this identifier to cite or link to this item: http://nthur.lib.nthu.edu.tw/dspace/handle/987654321/12834


    Title: Channel density reduction by routing over the cells
    Authors: Lin,Min-Siang
    Perng,Hourng-Wern
    Hwang,Chi-Yi
    Lin,Youn-Long
    Date: 1991
    Publisher: Institute of Electrical and Electronics Engineers Inc
    Keywords: Integrated Circuits
    VLSI
    Computer Aided Design
    Mathematical Techniques
    Graph Theory
    Mathematical Progamming
    Linear
    Abstract: An approach for reducing the density of a channel by routing some nets (or subnets) over the cells (i.e., outside the channel) is proposed. It is shown that only the removal of critical nets contributes to the reduction in the channel density. The channel is divided into zones, each having a zone density where the removal of any net from a zone will reduce its density by one. To reduce the channel density, only certain critical zones need to have their nets routed over the cells. A bipartite graph is used to represent the relationship between nets and zones. The problem is transformed into a constrained covering problem and formulated as an integer linear programming problem. Compared to previous research, the approach reduces more channel densities while using fewer tracks over the cells. For Deutsch's difficult channel, a previous approach needs 15 tracks over the cells to reduce the channel density by 3, whereas the present needs only 5 tracks to achieve the same result.
    Relation Link: http://webservices.ieee.org/pindex_basic.html
    URI: http://nthur.lib.nthu.edu.tw/handle/987654321/12834
    Appears in Collections:[資訊工程學系] 期刊論文
    [積體電路設計技術研發中心] 期刊論文
    [清大/工研院聯合研究中心] 期刊論文

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