| 摘要 |
A high voltage-generating circuit comprises a control circuit for generating a control signal for executing an operation command and generating a refresh signal depending upon a refresh operation, an oscillator driven according to an enable signal, for outputting an oscillation signal the cycle of which is controlled according to a refresh signal, a charge pump circuit for generating a high voltage using a power source voltage according to the oscillation signal, wherein the charge pump circuit has the ascent rate of the high voltage controlled according to variation in the cycle of the oscillation signal, and a level detection circuit for comparing the high voltage and a reference voltage to determine whether the high voltage reaches a target value, and controlling the operation of the oscillator according to the result of the comparison.
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