A Tutorial on Battery Simulation - Matching Power Source to Electronic System

We use an electrical circuit model to simulate the performance of a bat- tery as it powers the operation of a digital circuit. For a hypothetical elec- tronic system containing 70 million gates implemented in 45nm CMOS tech- nology the problem ofnding a suitable battery is analyzed. The proposed three part solution consists of (1) circuit simulation to determine critical path delay and average current as functions of supply voltage, (2) battery simulation to determine its efficiency and lifetime (time between recharges) at various current loads and tond suitable batteries for the electronic sys- tem, and (3) derivation of operational modes (supply voltages and clock frequencies) for maximum performance and minimum energy, respectively.

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