By Ricardo Martins, Nuno Lourenço, Nuno Horta
This booklet introduces readers to numerous instruments for analog structure layout automation. After discussing the situation and routing challenge in digital layout automation (EDA), the authors review numerous computerized format iteration instruments, in addition to the newest advances in analog layout-aware circuit sizing. The dialogue comprises diverse tools for computerized placement (a template-based Placer and an optimization-based Placer), a fully-automatic Router and an empirical-based Parasitic Extractor. The innovations and algorithms of the entire modules are completely defined, allowing readers to breed the methodologies, enhance the standard in their designs, or use them as place to begin for a brand new software. the entire tools defined are utilized to functional examples for a 130nm layout strategy, in addition to placement and routing benchmark sets.
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Additional resources for Analog Integrated Circuit Design Automation: Placement, Routing and Parasitic Extraction Techniques
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That share the same symmetry axis, close to each other. To model a specific placement within a symmetry island a structure based on the B*-tree is used, called automatically symmetric feasible (ASF) B*-tree. The principal task of this algorithm is performed on a structure, a hierarchical B*-tree (HB*tree), to simultaneously optimize the placement with both symmetry islands and non-symmetry modules, and dynamically update the shape for the devices within symmetry islands. The same hierarchical framework with symmetry islands was recently applied over a Slicing-tree representation .
However, depending on the topological representation used, the optimal solution can be left out of the search space. Furthermore, since the optimization kernel only changes the relative positioning, symmetry-feasible conditions by means of structure scan or post-processing in order to penalize, avoid or fix the symmetries violated each time the typically SA-based kernel perturbs the structure must be derived for each representation. Slicing The first class of relative representations is the slicing model, where cells are organized in sets of slices that recursively bisect the layout horizontally and vertically.
Analog Integrated Circuit Design Automation: Placement, Routing and Parasitic Extraction Techniques by Ricardo Martins, Nuno Lourenço, Nuno Horta