1 Maximum Power Estimation for CMOS Circuits Using Deterministic and Statistical Approaches
|
Abstract:
Abstract--- Excessive instantaneous power consumption may reduce the reliability and performance of VLSI chips. Hence, to synthesize circuits with high reliability, it is imperative to efficiently obtain a precise estimation of the maximum power dissipation. However, due to the inherent input-pattern dependence of the problem, it is impractical to conduct an exhaustive search for circuits with a large number of primary inputs. Hence, the practical approach is to generate a tight lower bound and an upper bound for maximum power dissipation within a reasonable amount of CPU time. In this paper, instead of using the traditional simulation-based techniques, we propose a novel approach to obtain a lower bound of the maximum power consumption using Automatic Test Generation (ATG) technique. Experiments with MCNC and ISCAS-85 benchmark circuits show that our approach generates the lower bound with the quality which cannot be achieved using simulation-based techniques. In addition, a Monte Carlo based technique to estimate maximum power dissipation is described. It not only serves as a comparison version for our ATG approach, but also generates a metric to measure the quality of a lower bound from a statistical point of view. I.
Citations
| 90 | Transition density: A stochastic measure of activity in digital circuits – Najm - 1991 |
| 48 | Saving power in the control path of embedded processors – Su, Tsui, et al. - 1994 |
| 43 | Circuit activity based logic synthesis for low power reliable operations – Roy, Prasad - 1993 |
| 41 | Statistical estimation of the switching activity in digital circuits – Xakellis, Najm - 1994 |
| 8 | P.Yang and T.Trick, "A Monte Carlo Approach for Power Estimation – Burch - 1993 |
| 6 | R.W.Brodersen, "Low-Power CMOS Digital Design – Chandrakasan - 1992 |
| 6 | and J.White, "Estimation of Power Dissipation – Devadas - 1990 |
| 5 | P.Yang and I.Hajj, "Resolving Signal Correlations for Estimating Maximum Currents – Kriplani - 1992 |
| 2 | I.Hajj, "Maximum Current Estimation in CMOS Circuits – Kriplani - 1992 |
