Patent ID: 7498866

Claim:
A high voltage pumping device comprising: a first high voltage detector configured to detect a level of a high voltage, and generate a first pumping enable signal which is enabled when the high voltage is lower than a predetermined reference voltage; a pumping control signal generator configured to generate 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 has begun; an oscillator configured to generate a predetermined oscillation signal in response to the pumping control signal; and a pumping unit configured to pump the high voltage to a predetermined level in response to the oscillation signal supplied from the oscillator, wherein 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 has 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, and wherein the pumping control signal generator comprises: a latch configured to latch the first control signal, and output a second control signal which is maintained in an active state during the active mode; a first buffer configured to buffer the second control signal; a first logic unit configured to perform a first logical operation of the first pumping enable signal and an output signal from the first buffer, and output a result of the first logical operation; a sensing unit configured to sense an activation of the first control signal, and generate an activation sensing signal which is enabled for the second period; and a second logic unit configured to perform a second logical operation of an output signal from the first logic unit and the activation sensing signal.