ABSTRACT
We propose an accuracy driven synthesis methodology for analog circuits. The proposed approach relies on macro-models for performance estimation and is thus orders of magnitude faster than simulation based synthesis techniques. Unlike existing macro-model based approaches, which use static models, our approach dynamically improves the accuracy of the model during synthesis to ensure true convergence. Our method is based on identifying and accurately modeling those regions in the design space where feasible designs lie. The identified feasible regions and their corresponding models are used in conjunction with an initially generated global model for performance estimation. Experimental results demonstrate that the proposed approach is able to synthesize designs using the enhanced performance models quickly, yet accurately.
- G. G. E. Gielen, H.C. C. Walscharts, and W. M. C. Sansen. Analog circuit design optimization based on symbolic simulation and simulated annealing. In IEEE Journal of Solid-State Circuits, volume 25, pages 707--713, June 1990.Google ScholarCross Ref
- M. Hershenson, S. P. Boyd, and T. H. Lee. GPCAD: A tool for CMOS op-amp synthesis. In Proc. of the International conference on Computer-aided design, pages 296--303, 1998. Google ScholarDigital Library
- R. Harjani and J. Shao. Feasibility and Performance Region Modeling of Analog and Digital Circuits. Analog Integrated Circuits and Signal Processing- special issue on Macromodeling, 10(1-2):23--43, 1996. Google ScholarDigital Library
- Glenn Wolfe, Mengmeng Ding, and Ranga Vemuri. Adaptive Sampling and Modeling of Analog Circuit Performance Parameters. In Proc. of IFIP 12th International Conf. on VLSI, 2003.Google Scholar
- H. Liu, A. Singhee, R. A. Rutenbar, and L. R. Carley. Remembrance of circuits past: macromodeling by data mining in large analog design spaces. In Proc. of the 39th conference on Design automation, pages 437--442. ACM Press, 2002. Google ScholarDigital Library
- F. De Bernardinis, M. I. Jordan, and A. S. Vincentelli. Support vector machines for analog circuit performance representation. In Proc. of the 40th conference on Design automation, pages 964--969, 2003. Google ScholarDigital Library
- T. Kiely and G. Gielen. Performance modeling of analog integrated circuits using least-squares support vector machines. In Proc. of Design, Automation and Test in Europe Conference and Exhibition, pages 448--453, 2004. Google ScholarDigital Library
- S. Zizala, J. Eckmuller, and H. Graeb. Fast calculation of analog circuits' feasibility regions by low level functional measures. In Proc. of the International Conference on Electronics, Circuits and Systems, pages 85--88, 1998.Google ScholarCross Ref
- J. Duchon. Splines minimizing rotation-invariant seminorms in sobolev spaces. In Constructive Theory of Functions of Several Variables, No. 571 in Lecture Notes in Mathematics, pages 85--100, 1977.Google Scholar
- Greg Turk and James F. O'Brien. Shape transformation using variational implicit functions. In Proceedings of the 26th annual conference on Computer graphics and interactive techniques, pages 335--342, 1999. Google ScholarDigital Library
Index Terms
- Accuracy driven performance macromodeling of feasible regions during synthesis of analog circuits
Recommendations
The Sizing Rules Method for CMOS and Bipolar Analog Integrated Circuit Synthesis
This paper presents the sizing rules method for basic building blocks in analog CMOS and bipolar circuit design. It consists of the development of a hierarchical library of transistor-pair groups as basic building blocks for analog CMOS and bipolar ...
Synthesis of high-performance analog circuits in ASTRX/OBLX
We present a new synthesis strategy that can automate fully the path from an analog circuit topology and performance specifications to a sized circuit schematic. This strategy relies on asymptotic waveform evaluation to predict circuit performance and ...
Comments