High level voltage generator

Abstract

A high level voltage generator, comprising: high voltage level detection means for comparing a potential level of a high voltage node and a target level to generate a first pumping enable control signal; first oscillation means for periodically generating a first pulse signal by the first pumping enable control signal from the high voltage level detection means; first high voltage pump means for pumping the potential level of the high voltage node by the first pulse signal from the first oscillation means; pumping drivability control means for detecting a length of an active time of the first pumping enable control signal to generate a second pumping enable control signal; second oscillation means for generating a second pulse signal by the second pumping enable control signal from the pumping drivablity control means; and second high voltage pump means for pumping the potential level of the high voltage node by the second pulse signal from the second oscillation means.

Dependencies are inferred from the claim text.