VOLTAGE GENERATOR, NONVOLATILE MEMORY DEVICE COMPRISING VOLTAGE GENERATOR, AND METHOD OF OPERATING VOLTAGE GENERATOR

摘要

A voltage generator comprises a first booster that generates a first high voltage, and a second booster that generates a second high voltage by boosting an external voltage. The first booster comprises a comparator that controls a boosting operation with reference to the fed back first high voltage and uses the second high voltage as a drive voltage.