Protection circuit
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United States of America Patent
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Aug 8, 2023
Grant Date -
N/A
app pub date -
Aug 31, 2021
filing date -
Sep 16, 2020
priority date (Note) -
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status (Latency Note)
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Abstract
A protection circuit comprises a first transistor, a comparator, a second transistor, and a third transistor. The first transistor has a gate connected to an input terminal and configured to pass a drain current based on a potential at the input terminal. The comparator has a non-inverting terminal to which a source of the first transistor is connected and an inverting terminal to which a reference voltage is applied. The second transistor has a gate to which an output of the comparator is applied, a source connected to a power supply voltage, and a drain connected to the input terminal. The third transistor has a gate to which a predetermined voltage is applied, a drain connected to the gate of the second transistor, and a source connected to the drain of the input transistor.
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