Supply voltage monitor using bandgap device without feedback
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United States of America Patent
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May 6, 2003
Grant Date -
N/A
app pub date -
Jul 9, 2001
filing date -
Jul 9, 2001
priority date (Note) -
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Abstract
A voltage monitor having a bandgap reference circuit driven by a voltage to be monitored. The bandgap reference circuit produces a voltage and a second voltage that each vary with the voltage to be monitored. The magnitudes of these voltages are compared by an open loop comparator to provide a high speed output state. The output of the voltage monitor can be used to monitor a supply voltage and produce a reset signal to a processor if the supply voltage falls to a magnitude below a specified threshold.
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