Patents by Inventor Guangmin He

Guangmin He has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Apparatus and method for controlling a charging circuit in a power over ethernet device
    Patent number: 9257858
    Abstract: A charging circuit and method for charging a power storage device in a power over Ethernet environment are necessary to prevent unnecessary power consumption. Power sourcing equipment continuously supplies power to a connected device after determining that the device is compatible. In order to prevent supply of power after a power storage device attains full charge, a charging circuit may include an interface for supplying electric power; a sensing circuit including a switch in series with a resistor; and a voltage detection circuit. The voltage detection circuit may communicate with the sensing circuit and may output a first signal that turns the switch OFF when the voltage of the power storage device is greater than or equal to a first voltage and may output a second signal that turns the switch ON when the voltage of the power storage device is less than or equal to a second voltage.
    Type: Grant
    Filed: February 13, 2012
    Date of Patent: February 9, 2016
    Assignee: Cisco Technology, Inc.
    Inventors: Chio Fai Aglaia Kong, Guangmin He, Paul Chang
  • APPARATUS AND METHOD FOR CONTROLLING A CHARGING CIRCUIT IN A POWER OVER ETHERNET DEVICE
    Publication number: 20130207593
    Abstract: A charging circuit and method for charging a power storage device in a power over Ethernet environment are necessary to prevent unnecessary power consumption. Power sourcing equipment continuously supplies power to a connected device after determining that the device is compatible. In order to prevent supply of power after a power storage device attains full charge, a charging circuit may include an interface for supplying electric power; a sensing circuit including a switch in series with a resistor; and a voltage detection circuit. The voltage detection circuit may communicate with the sensing circuit and may output a first signal that turns the switch OFF when the voltage of the power storage device is greater than or equal to a first voltage and may output a second signal that turns the switch ON when the voltage of the power storage device is less than or equal to a second voltage.
    Type: Application
    Filed: February 13, 2012
    Publication date: August 15, 2013
    Applicant: Cisco Technology, Inc.
    Inventors: Chio Fai Aglaia Kong, Guangmin He, Paul Chang