| 摘要 |
A voltage watching circuit including a external supply voltage receiver for being charged by an external supply voltage to produce a charged voltage, a watched voltage detecting section for inverting its output if the charged voltage provided from the external supply voltage receiver reaches a predetermined level, a latch section for latching an output of the watched voltage detecting section, and a reset section for resetting the latch section until the charged voltage of the external supply voltage receiver reaches the predetermined level. According to the circuit, the voltage watching with a proper voltage level is possible regardless of the variation of the temperature and process parameters, and a low power-consumption is achieved.
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