Abstract
In this paper, an analysis on the stepwise adiabatic circuits is presented. In this analysis, the energy consumption of stepwise adiabatic circuits for the case where it is possible to recycle the charge stored on the load capacitor is studied. As a results of the analysis, energy consumption equations are presented which accurately model the efficiency of the stepwise adiabatic circuits. The proposed analysis shows stepwise adiabatic circuits are able to decrease the total energy by a factor of N if the load capacitor is charged in N steps and then discharged in N steps. Energy consumption equations suggest even for small values of the tank capacitors the energy is reduced significantly. For example, if the tank capacitors are equal to the load capacitor, energy is reduced by 40% for N=2, 55% for N=3, and energy saving is increased with N. Simulation results in 0.18μm technology show the errors of the proposed derivations are less than 2% in different scenarios.
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