Patent ID: 7091769

Claim:
A voltage generator comprising: a detector for comparing an output voltage of the voltage generator with a first reference voltage to output a first sensing signal and comparing the output voltage of the voltage generator with a second reference voltage lower than the first reference voltage to output a second sensing signal; a controller controlled by an action signal for outputting a first control signal and a second control signal in response to the first sensing signal and the second sensing signal, respectively; a sub-booster for boosting the output voltage in response to the first control signal; a main booster for boosting the output voltage in response to the second control signal; and a voltage adder for adding output signals from the sub-booster and the main booster to provide the output voltage, wherein the controller comprises: an action detector for combining the first sensing signal and the second sensing signal, and the action signal to generate an output signal; a latch for latching the output signal from the action detector; and a sub-controller for receiving an output signal from the latch and the action signal to output the first control signal and the second control signal.