Power on reset circuit for microprocessor
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United States of America Patent
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-
Nov 12, 1985
Grant Date -
N/A
app pub date -
Feb 4, 1983
filing date -
Feb 4, 1983
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A circuit for generating a pulse when a voltage (VDD) is applied thereto comprising an input (10) for receiving the applied voltage, an output (36), a first capacitor (16) connected to be charged from the input through a first switch (12), a second capacitor (18) connected to be charged from the first capacitor through a second switch (14), control means (34) for alternately enabling the first and second switches and switch means (20, 22, 24, 26) connected to the second capacitor for applying the applied voltage to the output when the voltage on the second capacitor is less than a predetermined value and for applying ground voltage to the output when the voltage on the second capacitor is greater than the predetermined value.
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