| 摘要 |
There is provided a power-on reset circuit for generating a power-on reset signal regardless of a power-up slope using not an RC delay method but a current detection method. The power-on reset circuit includes: a power supply voltage sensing node; a power supply voltage detecting unit connected to the power supply voltage sensing node, for detecting a power supply voltage level caused by a difference between a pull-up current and a pull-down current, wherein the power supply voltage detecting unit pulls down the power supply voltage sensing node if the power supply voltage reaches a threshold voltage; and a driving unit connected to the power supply voltage sensing node, for pulling up the sensing node if the power supply voltage is lower than the threshold voltage and buffering a signal of the power supply voltage sensing node to output a power-on reset signal.
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