POWER MANAGEMENT DEVICE AND METHOD OF OPERATING THE SAME

    公开(公告)号:US20240241533A1

    公开(公告)日:2024-07-18

    申请号:US18412938

    申请日:2024-01-15

    CPC classification number: G05F1/67 G05F1/468 H02J50/001 H02M1/0032 H02M3/158

    Abstract: A power management device includes a converter, a sampling circuit, an MPPT management circuit, and an MPPT control circuit. The converter converts a voltage across an output node of an energy source, based on a first control signal to output a final output voltage; The sampling circuit includes a sampling node measures a sampling voltage related to an open circuit voltage of the energy source, based on a second control signal. The MPPT management circuit generates the first control signal, based on the second control signal, the sampling voltage, and the voltage across the output node of the energy source. The MPPT control circuit controls a voltage level of the sampling voltage to be changed within a first threshold voltage range by applying a current to the sampling node, based on the second control signal and the sampling voltage.

    WIRELESS DEVICE AND OPERATING METHOD THEREOF

    公开(公告)号:US20220140649A1

    公开(公告)日:2022-05-05

    申请号:US17396271

    申请日:2021-08-06

    Abstract: Disclosed are a wireless device capable of being self-powered and an operating method thereof. The wireless device includes an energy harvesting module that generates electrical energy based on energy supplied from an outside, a power management module that generates a voltage based on the electrical energy provided from the energy harvesting module, a user input interface that includes at least one input device sensing an input of a user, and a communication module that transfers a command corresponding to the at least one input device to the outside based on the voltage provided from the power management module, in response to that the at least one input device is accessed by the user.

    GAS SENSOR AND MANUFACTURING METHOD THEREOF

    公开(公告)号:US20220128498A1

    公开(公告)日:2022-04-28

    申请号:US17506658

    申请日:2021-10-20

    Abstract: Provided is a gas sensor including a substrate, a first membrane disposed on the substrate, a heating structure disposed on the first membrane, a second membrane disposed on the heating structure, a sensing electrode disposed on the second membrane, and a sensing material structure disposed on the sensing electrode. Here, the substrate provides an isolation space defined by a recessed surface obtained as a portion of a top surface of the substrate is spaced downward from a bottom surface of the first membrane, and the first membrane provides a first membrane etching hole that vertically extends to connect a top surface and the bottom surface of the first membrane and is connected with the isolation space. Also, the first membrane etching hole has a diameter of about 3 μm to about 20 μm.

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