High-efficiency charge pumping circuit

摘要

A high-efficiency charge pumping circuit includes an oscillator for generating a predetermined cycle of pulse voltage; a first booster capacitor unit for storing an output of the oscillator at a high level, and outputting an output when the output of the oscillator is at a low level; a first clamp unit for maintaining the output of the first booster capacitor unit at a predetermined level; a second clamp unit for maintaining the output of the first booster capacitor unit at a predetermined level; a double-booster circuit for performing a double-boosting of an output signal of the oscillator and then outputting the double-boosted output signal as an output of the double-booster circuit; a second booster capacitor unit for temporarily storing an output voltage of the double-boosted circuit and for outputting the temporarily stored voltage to the second clamp unit; an output transistor for receiving a voltage greater than a predetermined level from the double-booster circuit, and for completely outputting a voltage input from the first clamp unit; a voltage holding transistor for receiving an internal voltage, and for outputting a voltage signal to an output node; a clipper for interrupting a threshold voltage of the output transistor when a voltage of the output transistor is above a predetermined voltage; and a storage capacitor for temporarily storing a voltage of the voltage holding transistor.