Input-output circuit for increasing immunity to voltage spikes
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United States of America Patent
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Jul 29, 1997
Issued Date -
N/A
app pub date -
Jun 6, 1995
filing date -
Jun 21, 1991
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An input/output circuit for increasing immunity to voltage spikes from voltage supplies is provided. The circuit includes a first pair of transistors each having their drains connected to an output terminal and their sources connected to voltage supplies. A mechanism is connected to electrically separated voltage supplies to alternately turn on one of the first pair of transistors responsive to an input signal. A transistor is utilized to provide feedback to limit the rise in a ground voltage supply as occurs during ground bounce.
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