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Erschienen in:
1987 | OriginalPaper | Buchkapitel
Design and Layout Generation at the Symbolic Level
verfasst von : Carlo H. Séquin
Erschienen in: VLSI CAD Tools and Applications
Verlag: Springer US
Enthalten in: Professional Book Archive
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A pipeline or three tools for the construction or high-quality macro modules or library cells is described. TOPOGEN is a synthesis tool that takes a logic description at the gate level and converts it into a symbolic layout or a static CMOS circuit on a virtual (coarse) grid. EDISTIX is an interactive virtual grid editor for the creation or modification of symbolic sticks diagrams. ZORRO is a two-dimensional compactor using the concept of ‘Zone refining’ to generate the mask geometry from the symbolic layout. The generation or the final layout of a cell is a two-step process using an intermediate symbolic representation on a virtual grid. In this intermediate state, the user can interactively make changes.