Improved Power Estimation Methodology Based on Signal Transition Density Propagation Behavior

신호 전이 밀도 전파 동작에 기초한 향상된 전력 평가 방법의 연구

  • 김동호 (Univ of Texas at Austin 대학원 전기 컴퓨터 공학과) ;
  • 우종정 (성신여자대학교)
  • Published : 2000.08.01

Abstract

An improved transition density propagation method for power estimation is proposed. The power estimation for the zero delay model is a proper criteria for the.lower boutldlIry for power consumption. A transition propagation method, including the zero delay model as a lower boundary for power stimation was studied. However, there were some redundancy factors in the process of transition density propagation. Hence this paper will explore the transition density propagation behavior to eliminate the redundancy factors and present theirriprQved estimation methodology for the signal transition density. The experiments show that the proposed method has comparably better estimation accuracy than the conventional methods.

전력 평가를 위한 전이 밀도 전파에 대한 개선된 방법을 제안한다. 제로 지연 모델을 위한 전력 평가는 전력 소모의 하한 경계 값에 대한 적절한 기준이다. 전력 예측을 위한 하한 값으로 제로 지연 모델을 사용한 전이 전파 방법에 대한 연구가 있지만 전이 밀도 전파 과정 중 잉여 요소들을 제거하지 못하였다. 본 연구에서는 전이 전파 밀도 동작을 분석함에 의하여 잉여 요소들을 제거할 수 있는 향상된 신호 전이 밀도 예측 기법을 제안한다. 실험에 의하면 제안된 방법이 기존의 방법에 비하여 상대적으로 양호한 예측 정확도를 나타낸다.

Keywords

References

  1. F. Najm, 'Transition density : a new measure of activity in digital circuits,' IEEE transaction on Computer-Aided Design, pp.224-228, November 1993
  2. A. Ghosh, S. Devadas, K. Keutzer, and J. White, 'Estimation of average switching activity in combinational and sequence circuits,' ACM/IEEE Design Automation Conf, pp.253-259, 1992 https://doi.org/10.1109/DAC.1992.227826
  3. J. Monteiro, S. Devadas, B. Lin, C-Y. Tsui, M. Pedram, and A. Despain, 'Exact and approximate methods of switching activity estimation in sequential circuits,' Intl. Workshop on Low Power Design, Napa Valley, 1994
  4. T. Chou, K. Roy, and S. Prasad, 'Estimation of circuit activity considering signal correlations and simultaneous Switching,' IEEE/ACM International Conference on Computer-Aided Design, pp.300-303, 1994
  5. C. M. Huizer, 'Power dissipation analysis of CMOS VLSI circuits by means of switching-level simulation,' IEEE European Solid State Circuits Conference, pp.61-64, 1990
  6. R. Burch. F. Najm, P. Yang, T, Trick, 'McPOWER : a Monte Carlo approach to power estimation,' IEEE/ACM International Conference on Computer-Aided Design, pp.90-97, 1992 https://doi.org/10.1109/ICCAD.1992.279392
  7. Q. Wu, M. Pedram and X. Wu, 'A note on the relationship between signal probability and switching activity,' Proc. of Asia and South Pacific Design Automation Conf., pp.117-120, 1997 https://doi.org/10.1109/ASPDAC.1997.600070
  8. R. Panda and F. N. Najm, 'Technology-dependent transformations for low-power synthesis,' 34th Design Automation Conference, pp.650-655, 1997 https://doi.org/10.1145/266021.266310