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Efficient Transition-Mode Boolean Characteristic Function with Its Application to Maximum Instantaneous Current Analysis

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3 Author(s)
Cheng-Tao Hsieh ; Dept. of Comput. Sci., Nat. TsingHua Univ., Hsinchu ; Jian-Cheng Lin ; Shih-Chieh Chang

Circuit timing and power analysis are important in various aspects of circuit optimization. In order to solve the problem of finding input vectors to activate worst-case timing or power, a concept called timed characteristic function (TCF) was proposed, which can characterize logical and temporal conditions simultaneously. Traditionally TCF assumes the (one-vector) floating mode of operation. In this paper we extend TCF for the (two-vector) transition mode and propose an efficient way to construct transition-mode TCF. Also, we apply the TCF concept to the analysis of the maximum instantaneous current (MIC) of a circuit, where transition-mode TCF is used to formulate gates' switching conditions. The experimental results show that on average, the TCF technique can derive about 30% more accurate MIC results than random simulation does for combinational circuits

Published in:

Quality Electronic Design, 2007. ISQED '07. 8th International Symposium on

Date of Conference:

26-28 March 2007