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This brief discusses modeling of a high-voltage generator, including a charge pump circuit and a regulator for accelerating system-level simulations. Event-driven simulators become slow when hard switching frequently occurs to enable charge pump circuits even with a conventional model. A current mirror is added to the pump model and is connected to an output node of a comparator in the voltage detector to make every node in the feedback loop fully analog. Simulation results show that the simulation time for voltage generators' system is reduced by a factor of about 10 with an error of 5% in comparison with the conventional model.
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Tôru Tanzawa (2011) studied this question.
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