| 摘要 |
The present invention generates a boosted voltage by preventing a latch-up phenomenon during an initial operating time, i.e., when a power voltage is initially inputted. The present invention includes a level-detecting block for comparing an high voltage with a high reference voltage and for generating a level detect signal; an oscillating block that is enabled to generate a periodic pump signal based on the level detect signal; a charge-pumping block for performing a pumping operation to generate the high voltage in response to the periodic pump signal; and an initial block for preventing a latch-up phenomenon by minimizing level differences between a power voltage and the high voltage before the power voltage reaches to a predetermined level where the pumping operation is guaranteed.
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