VLSI/CAD Laboratory VLSI/CAD Laboratory Department of Computer Science Department of Computer Science National Tsing Hua University National Tsing Hua University TH EDA TH EDA Estimation of Estimation of Maximum Instantaneous Maximum Instantaneous Current for Sequential Current for Sequential Circuits Circuits Cheng-Tao Hsieh and Shih-Chieh C hang National Tsing Hua University Hsinchu, Taiwan
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VLSI/CAD Laboratory Department of Computer Science National Tsing Hua University TH EDA Estimation of Maximum Instantaneous Current for Sequential Circuits.
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VLSI/CAD LaboratoryVLSI/CAD LaboratoryDepartment of Computer ScienceDepartment of Computer ScienceNational Tsing Hua UniversityNational Tsing Hua University
TH EDATH EDA
Estimation of Estimation of Maximum Instantaneous Current for Maximum Instantaneous Current for
Sequential CircuitsSequential Circuits
Cheng-Tao Hsieh and Shih-Chieh Chang
National Tsing Hua University
Hsinchu, Taiwan
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Maximum Instantaneous Current (MIC)Maximum Instantaneous Current (MIC)
To calculate the MIC, must decide which input vectors and at which time.
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MIC=3 at time t=3 MIC=4 at time t=1.t=1t=2t=3
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Two Types of MethodsTwo Types of Methods
Vector dependent Deriving the worst case vectorsLower bound estimation
Vectorless No vector searchUpper bound estimation
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Two Types of MethodsTwo Types of Methods
Vector dependent Deriving the worst case vectorsLower bound estimation
Vectorless No vector searchUpper bound estimation
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Vectorless MethodsVectorless Methods
Definition: Two gates are Mutually Exclusive Switching (MES) at time t1 if they cannot switch simultaneously at t1.
[C.T. Hsieh, J.C. Lin, and S.C. Chang, accepted by TCAD]