TY - GEN
T1 - Achieving routing integrity in analog layout migration via cartesian detection lines
AU - Chi, Hao Yu
AU - Lin, Zi Jun
AU - Hung, Chia Hao
AU - Liu, Chien Nan Jimmy
AU - Chen, Hung Ming
PY - 2019/11
Y1 - 2019/11
N2 - In order to improve design productivity, proper layout automation tools are desired for analog circuits. Layout migration is one possible approach to generate a new layout for given circuits with different device sizes or different technology, and still keep the original layout topology. However, routing behaviors are often not mentioned in previous works, which requires a complete rerouting that may not follow the original style. Pan [16] first proposed a Constrained Delaunay Triangulation (CDT) based model to keep the routing behavior during layout migration. However, because the device sizes and related distance may be different in the new layout, some reference lines in CDT models may be removed, resulting in some missing nets after migration. In this paper, a novel Cartesian Detection Line (CDL) based model is proposed to preserve the routing behavior in original layouts. Because alternative lines in the modified placement can be easily found to prevent from missing nets, the proposed CDL model greatly improves the routing completeness during layout migration. Several routing refinement techniques are also proposed to solve the routing issues due to block displacement. In our experiments, the routing completeness can be improved to almost 100% with the proposed CDL model, which greatly reduces the design efforts.
AB - In order to improve design productivity, proper layout automation tools are desired for analog circuits. Layout migration is one possible approach to generate a new layout for given circuits with different device sizes or different technology, and still keep the original layout topology. However, routing behaviors are often not mentioned in previous works, which requires a complete rerouting that may not follow the original style. Pan [16] first proposed a Constrained Delaunay Triangulation (CDT) based model to keep the routing behavior during layout migration. However, because the device sizes and related distance may be different in the new layout, some reference lines in CDT models may be removed, resulting in some missing nets after migration. In this paper, a novel Cartesian Detection Line (CDL) based model is proposed to preserve the routing behavior in original layouts. Because alternative lines in the modified placement can be easily found to prevent from missing nets, the proposed CDL model greatly improves the routing completeness during layout migration. Several routing refinement techniques are also proposed to solve the routing issues due to block displacement. In our experiments, the routing completeness can be improved to almost 100% with the proposed CDL model, which greatly reduces the design efforts.
UR - http://www.scopus.com/inward/record.url?scp=85077788109&partnerID=8YFLogxK
U2 - 10.1109/ICCAD45719.2019.8942088
DO - 10.1109/ICCAD45719.2019.8942088
M3 - Conference contribution
AN - SCOPUS:85077788109
T3 - IEEE/ACM International Conference on Computer-Aided Design, Digest of Technical Papers, ICCAD
BT - 2019 IEEE/ACM International Conference on Computer-Aided Design, ICCAD 2019 - Digest of Technical Papers
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 38th IEEE/ACM International Conference on Computer-Aided Design, ICCAD 2019
Y2 - 4 November 2019 through 7 November 2019
ER -