Input/output protection circuit
The invention provides an input and output protection circuit which comprises a first switching device and a second switching device which are respectively provided with three electrodes, the third electrode of the first switching device is connected with the first electrode of the second switching...
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| Hauptverfasser: | , , |
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| Format: | Patent |
| Sprache: | chi ; eng |
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| Zusammenfassung: | The invention provides an input and output protection circuit which comprises a first switching device and a second switching device which are respectively provided with three electrodes, the third electrode of the first switching device is connected with the first electrode of the second switching device, and a feedback circuit is arranged between the first electrode of the first switching device and the third electrode of the second switching device; the third electrode of the second switching device is connected to a power supply through an anti-backflow circuit, and the third electrode of the first switching device is connected to the power supply through a system resistor; a bias resistor is connected between the first electrode and the second electrode of the first switching device, and the input end is connected to the first electrode of the first switching device through a current-limiting resistor; a turn-off voltage is arranged between the third electrode and the second electrode of the second switc |
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