| 摘要 |
A high voltage generating circuit comprises a secondary high voltage detector, a secondary high voltage generator, a primary high voltage detector, and a primary high voltage generator. An active signal enables the secondary high voltage detector, which when active, asserts a second signal upon detecting a drop of a high voltage signal and/or in response to a first signal. The secondary high voltage generator boosts the high voltage signal in response to the second signal. The primary high voltage detector asserts the first signal upon detecting the drop in the high voltage signal. The primary high voltage generator boosts the high voltage signal in response to the first signal. Accordingly, in active mode, the secondary high voltage generator can quickly and accurately compensate for a drop in the high voltage signal, since the secondary high voltage detector signals the drop of the high voltage signal before a word line is enabled.
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