Abstract
This paper presents a technique for automatic active device layout generation and insertion incorporated in a layout retargeting tool-suite for analog integrated circuits. While the use of a graph-based symbolic template in the retargeting tool maintains the overall layout topology, layout symmetries, and embedded expertise of the designers, the device generator allows further optimization of active devices in terms of device width, length, and finger variables through template modification. Combining the device layout generator with a design-space exploration engine that searches for optimal sets of design variables satisfying performance requirements, a new automatic design reuse methodology is presented. Multiple high quality analog circuits corresponding to different target specifications are synthesized in less than an hour, and their layouts with different device sizes and structures are generated in less than a minute of CPU time.
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