Reset device
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United States of America Patent
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May 31, 2011
Grant Date -
May 8, 2008
app pub date -
Oct 9, 2007
filing date -
Nov 2, 2006
priority date (Note) -
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status (Latency Note)
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Abstract
A disclosed reset device for outputting a reset signal based on a magnitude of an input power supply voltage includes: a power supply voltage monitoring unit including a comparator to which a detection voltage detected based on the magnitude of the power supply voltage and a reference voltage to be used as an inversion reference for the reset signal are input, the comparator comparing the detection voltage with the reference voltage and outputting an output voltage in accordance with a result of the comparison; and a reset signal outputting unit including a CMOS inverter to which the output voltage output from the power supply voltage monitoring unit is input, the unit outputting the reset signal. An impedance unit is disposed between a P-channel MOS transistor constituting the inverter and a power supply voltage line and/or between an N-channel MOS transistor constituting the inverter and a ground line.
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