A Current-based Method for Short Circuit Power Calculation under Noisy Input Waveforms

An accurate model is presented to calculate the short circuit energy dissipation of logic cells. The short circuit current is highly dependent on the input and output voltage values. Therefore the actual shape of the voltage signal waveforms at the input and output of the cell should be considered in order to precisely calculate the short circuit energy dissipation. Previous approaches such as the approximation of the crosstalk induced noisy waveforms with saturated ramps can lead to short circuit energy estimation errors as high as an order of magnitude for a minimum sized inverter. To resolve this shortcoming, a currentbased logic cell model is utilized, which constructs the output voltage waveform for a given noisy input waveform. The input and output voltage waveforms are then used to calculate the short circuit current, and hence, short circuit energy dissipation. A characterization process is executed for each logic cell in the standard cell library to model the relevant electri...

• Type: Conference
• Year: 2007
• Where: ASPDAC
• Authors: Hanif Fatemi, Shahin Nazarian, Massoud Pedram
• Keywords: ASPDAC 2007, Circuit Energy Dissipation, Hardware, Short Circuit, Short Circuit Energy