Techniques for simultaneous placement and routing of custom analog cells in KOAN/ANAGRAM II

The authors describe novel techniques for simultaneous device placement and detailed routing of analog cells. Both nets and devices are treated as placeable, malleable objects in a common simulated-annealing framework. A detailed routing abstraction called a k-bend net limits the complexity of each net´s topology, and allows simple incremental net reshaping during annealing. Analog layouts in which the critical interacting nets are simultaneously embedded during device placement prove to be superior, in terms of performance-limiting crosstalk violations, to sequentially placed and routed layouts.<>