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US 10,594,229 B2Granted
Powered device (PD) with simplified rectifier circuit
AssigneeHuawei Technologies Co., Ltd.
InventorsJincan Cao, Xuefeng Tang
Life of this patent
Estimating the term…
Abstract
In a powered device (PD), four MOSFETs are used in a rectifier circuit. The four MOSFETs are disposed based on a premise that an electric potential of a contact pair 1-2 is lower than that of a contact pair 3-6 and an electric potential of a contact pair 7-8 is lower than that of a contact pair 4-5, so that a PoE current of each contact group passes through only two of the MOSFETs but does not pass through a diode.
Claims20
A powered device (PD) comprising:
- an Ethernet port comprising:
- a first contact pair configured to connect to a cable pair 1-2 of an Ethernet cable,
- a second contact pair configured to connect to a cable pair 3-6 of the Ethernet cable,
- a third contact pair configured to connect to a cable pair 4-5 of the Ethernet cable, and
- a fourth contact pair configured to connect to a cable pair 7-8 of the Ethernet cable;
- a rectifier circuit comprising:
- a first metal-oxide-semiconductor field-effect transistor (MOSFET) comprising a first end connected to the first contact pair, a second end, and a first gate electrode connected to the second contact pair,
- a second MOSFET comprising a third end connected to the second contact pair, a fourth end, and a second gate electrode connected to the first contact pair,
- a third MOSFET comprising a fifth end connected to the third contact pair, a sixth end, and a third gate electrode connected to the fourth contact pair,
- a fourth MOSFET comprising a seventh end connected to the fourth contact pair, an eighth end, and a fourth gate electrode connected to the third contact pair,
- a first diode comprising a first anode and a first cathode, wherein the first anode is connected to the first contact pair,
- a second diode comprising a second anode and a second cathode, wherein the second cathode is connected to the second contact pair,
- a third diode comprising a third anode and a third cathode, wherein the third cathode is connected to the third contact pair, and
- a fourth diode comprising a fourth anode and a fourth cathode, wherein the fourth anode is connected to the fourth contact pair;
- wherein the first MOSFET, the second MOSFET, the third MOSFET, and the fourth MOSFET are the only MOSFETS in the rectifier circuit;
- and
- a PD circuit comprising:
- a power input positive electrode connected to the fourth end, the sixth end, the first cathode, and the fourth cathode, and
- a power input negative electrode connected to the second end, the eighth end, the second anode, and the third anode.
16 more elements
Dependencies are inferred from the claim text.