Power down detection circuit
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United States of America Patent
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Nov 13, 2007
Issued Date -
N/A
app pub date -
Jan 9, 2006
filing date -
Jan 9, 2006
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A power down reset circuit for asserting a signal when a first V.sub.DD voltage falls below a voltage threshold. The circuit has at least one diode coupled to the first V.sub.DD voltage. The at least one diode is configured to produce a second voltage. At least one capacitor is coupled to the at least one diode to maintain the second voltage. A voltage detector asserts a signal when the first V.sub.DD voltage drops below a threshold level. The voltage detector is powered by the second voltage and is coupled to the at least one diode.
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