Patent ID: 6320457
Filing Date: 2001-11-20
Classification: H02M

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; andsecond high voltage pump means for pumping the potential level of the high voltage node by the second pulse signal from the second oscillation means.