Cooper & Dunham LLP
High voltage pumping device
A high voltage pumping device is provided which includes a first high voltage detector for detecting a level of a high voltage, and generating a first pumping enable signal which is enabled when the high voltage is lower than a predetermined reference voltage, a pumping control signal generator for generating a pumping control signal adapted to control a high voltage pumping operation, in response to the first pumping enable signal and a first control signal which is enabled for a first period when an active mode is begun, an oscillator for generating a predetermined oscillation signal in response to the pumping control signal, and a pumping unit for pumping the high voltage to a predetermined level in response to the oscillation signal supplied from the oscillator. The high voltage pumping device performs an initial high voltage pumping operation for a second period in response to the first control signal when the active mode is begun, and subsequently performs a high voltage pumping operation in the active mode in response to the first pumping enable signal when the high voltage is lower than the predetermined reference voltage.
Hynix Semiconductor Inc.
G G G H
G11C G11C G11C H02M
inventional inventional inventional inventional
Hyang Hwa
Choi