Protection circuit for hot plug detection port
The invention relates to a protection circuit for a hot plug detection port. The protection circuit comprises a current limiting circuit, a voltage clamp circuit and a negative voltage coupling circuit, wherein the current limiting circuit comprises a first resistor connected between a hot plug sign...
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Format: | Patent |
Sprache: | chi ; eng |
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Zusammenfassung: | The invention relates to a protection circuit for a hot plug detection port. The protection circuit comprises a current limiting circuit, a voltage clamp circuit and a negative voltage coupling circuit, wherein the current limiting circuit comprises a first resistor connected between a hot plug signal input opening and a hot plug signal output opening in the hot plug detection port; the voltage clamp circuit comprises a triode, a second resistor and a third resistor; a collector electrode of the triode is connected to the hot plug signal output opening, an emitter electrode of the triode is connected to a GND end, one end of the second resistor and one end of the third resistor are respectively connected to the hot plug signal output opening, the other end of the second resistor is connected to a base electrode of the triode, the other end of the third resistor is connected to the GND end, the negative voltage coupling circuit comprises a series connection circuit formed via series connection of a fourth resi |
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