| 摘要 |
A charge pump for a nonvolatile memory, having a clock generator circuit supplying an output clock signal; a phase generator circuit receiving the output clock signal, and supplying phase signals; and a voltage booster circuit receiving a supply voltage supplied from outside to the nonvolatile memory and the aforesaid phase signals, and supplying a read voltage higher than the supply voltage. The clock generator circuit includes a comparator receiving the read voltage and a reference voltage, and supplying a selection signal indicating the outcome of the comparison between the read and reference voltages; and a multiplexer receiving a first input clock signal having a pre-set frequency, a second input clock signal having a frequency correlated to the transition frequency of the addresses supplied to the nonvolatile memory, and the selection signal, and supplying the aforesaid output clock signal.
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