Common-Centroid Layout for Active and Passive Devices: A Review and the Road Ahead

Nibedita Karmokar,Sachin S Sapatnekar,Meghna Madhusudan,Arvind K Sharma,Mark Po-Hung Lin,Ramesh Harjani

doi:10.1109/asp-dac52403.2022.9712576

Common-Centroid Layout for Active and Passive Devices: A Review and the Road Ahead

Nibedita Karmokar, Sachin S Sapatnekar + Show 4 more

https://doi.org/10.1109/asp-dac52403.2022.9712576

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Publication Date: Jan 17, 2022

Citations: 6

Affiliation: University of Minnesota, National Yang Ming Chiao Tung University

#Common-centroid Layout #Common-centroid + Show 8 more

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Abstract

This paper presents an overview of common-centroid (CC) layout styles, used in analog designs to overcome the impact of systematic variations. CC layouts must be carefully engineered to minimize the impact of mismatch. Algorithms for CC layout must be aware of routing parasitics, layout-dependent effects (for active devices), and the performance impact of layout choices. The optimal CC layout further depends on factors such as the choice of the unit device and the relative impact of uncorrelated and systematic variations. The paper also examines scenarios where non-CC layouts may be preferable to CC layouts.

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