Title :
Constraint-based channel routing for analog and mixed analog/digital circuits
Author :
Choudhury, Umakanta ; Sangiovanni-Vincentelli, Alberto
Author_Institution :
Dept. of Electr. Eng. & Comput. Sci., California Univ., Berkeley, CA, USA
Abstract :
A well-defined methodology for mapping the constraints on a set of critical coupling capacitances into constraints in the vertical-constraint (VC) graph of a channel is presented. The approach involves directing undirected edges, adding directed edges and increasing the weights of edges in the VC graph, in order to meet crossover constraints between orthogonal segments and adjacency constraints between parallel segments, while attempting to cause minimum increase in the channel height due to the constraints. A technique to match the parasitics for symmetrical pairs of nets in the channel is also proposed.<>
Keywords :
circuit layout CAD; linear integrated circuits; adjacency constraints; constraint-based channel routing; critical coupling capacitances; mapping; mixed analog/digital circuits; orthogonal segments; parasitics; symmetrical pairs; Analog circuits; Capacitance; Coupling circuits; Digital circuits; Mutual coupling; Routing;
Conference_Titel :
Computer-Aided Design, 1990. ICCAD-90. Digest of Technical Papers., 1990 IEEE International Conference on
Conference_Location :
Santa Clara, CA, USA
Print_ISBN :
0-8186-2055-2
DOI :
10.1109/ICCAD.1990.129879
