Title :
New algorithms for placement and routing of custom analog cells in ACACIA
Author :
Cohn, J. ; Garrod, D. ; Rutenbar, R. ; Carley, L.
Author_Institution :
Dept. of Electr. & Comput. Eng., Carnegie Mellon Univ., Pittsburgh, PA, USA
Abstract :
KOAN and ANAGRAM II, novel analog placement and routing tools in the CMU ACACIA system are presented. Together, these tools support a more general model of analog layout than conventional analog macrocell systems. KOAN dynamically merges devices, supports complex symmetry constraints, and automatically generates well and bulk contacts. ANAGRAM II routes arbitrary-width wires, and supports over-the-device and symmetric differential wiring. Both tools have more support for interactive use than their predecessor, the original ANAGRAM system. Preliminary results are encouraging
Keywords :
analogue circuits; application specific integrated circuits; cellular arrays; circuit layout CAD; software packages; wiring; ACACIA; ANAGRAM II; CMU ACACIA system; KOAN; analog layout; arbitrary-width wires; bulk contacts; complex symmetry constraints; custom analog cells; placement; routing; symmetric differential wiring; Analog circuits; Circuit synthesis; Crosstalk; Macrocell networks; Merging; Routing; Silicon; Solid modeling; Wire; Wiring;
Conference_Titel :
Custom Integrated Circuits Conference, 1990., Proceedings of the IEEE 1990
Conference_Location :
Boston, MA
DOI :
10.1109/CICC.1990.124815
