Analog placement based on hierarchical module clustering

Po-Hung Lin*, Shyh Chang Lin

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

33 Scopus citations


In analog layout design, It is very important to reduce the parasitic coupling effects and improve the circuit performance. Consequently, the most important device-level placement constraints are matching, symmetry, and proximity. However, many previous works deal with these constraints separately, and none of them mention how to handle different constraints simultaneously and hierarchically. In this paper, we first give a. case study to show the needs of integrating these constraints in a hierarchical manner. Then, we present the first formulation for analog placement based on hierarchical module clustering. Our approach can handle analog placement with various constraint groups including matching, (hierarchical) symmetry, and (hierarchical) proximity groups. To our best knowledge, this is also the first work in the literature to handle floorplanning with the clustering constraint using the B*-tree based representation. Experimental results based on industrial analog designs show that our approach is very effective and efficient.

Original languageEnglish
Title of host publicationProceedings of the 45th Design Automation Conference, DAC
Number of pages6
StatePublished - 17 Sep 2008
Event45th Design Automation Conference, DAC - Anaheim, CA, United States
Duration: 8 Jun 200813 Jun 2008

Publication series

NameProceedings - Design Automation Conference
ISSN (Print)0738-100X


Conference45th Design Automation Conference, DAC
CountryUnited States
CityAnaheim, CA


  • Analog placement
  • Floorplanning

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