Circuital device for the power-on reset of digital integrated circuits in MOS technology
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United States of America Patent
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Oct 17, 1989
Grant Date -
N/A
app pub date -
Nov 25, 1987
filing date -
Nov 30, 1987
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A power-on reset circuit for supplying a reset pulse when a supply voltage rises above a preset threshold includes a reference voltage generator connected between the supply voltage and ground for supplying a reference signal having a constant preset value when the supply voltage is greater than the preset threshold. A supply follower provides an input signal which follows the supply voltage with a preset reduction factor. A bistable comparator having a first input driven by the reference signal and a second input driven by the input signal switches from a first state to a second state when the input signal exceeds the reference signal.
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