Low dropout linear voltage regulator

    公开(公告)号:US11082047B2

    公开(公告)日:2021-08-03

    申请号:US16320129

    申请日:2017-10-16

    Abstract: A low dropout linear voltage regulator is provided. In the low dropout linear voltage regulator, a power transistor has a source connected to a power source, a gate connected to an output terminal of an error amplifier, a drain connected to an output terminal of the low dropout linear voltage regulator. A dynamic Miller compensation network has a first terminal connected to the output terminal of the error amplifier, a second terminal connected to the output terminal of the low dropout linear voltage regulator. A controller has a first terminal connected to the gate of the power transistor, and a second terminal connected to a third terminal of the Miller compensation network. The controller is configured to detect a current at the output terminal of the low dropout linear voltage regulator and generate control signals according to the current to control connection and disconnection of each second resistance-capacitance branch in the dynamic Miller compensation network.

    LOW DROPOUT LINEAR VOLTAGE REGULATOR

    公开(公告)号:US20210021270A1

    公开(公告)日:2021-01-21

    申请号:US16320129

    申请日:2017-10-16

    Abstract: A low dropout linear voltage regulator is provided. In the low dropout linear voltage regulator, a power transistor has a source connected to a power source, a gate connected to an output terminal of an error amplifier, a drain connected to an output terminal of the low dropout linear voltage regulator. A dynamic Miller compensation network has a first terminal connected to the output terminal of the error amplifier, a second terminal connected to the output terminal of the low dropout linear voltage regulator. A controller has a first terminal connected to the gate of the power transistor, and a second terminal connected to a third terminal of the Miller compensation network. The controller is configured to detect a current at the output terminal of the low dropout linear voltage regulator and generate control signals according to the current to control connection and disconnection of each second resistance-capacitance branch in the dynamic Miller compensation network.

    METHOD FOR ASSESSING WATER SHORTAGE RISK, DEVICE, COMPUTER DEVICE AND STORAGE MEDIUM

    公开(公告)号:US20210018484A1

    公开(公告)日:2021-01-21

    申请号:US16937554

    申请日:2020-07-23

    Abstract: In the present application, a method for assessing water shortage risk, device, computer device and storage medium are provided, wherein the method for assessing water shortage risk comprises: acquiring a volume of blue water flowing into soil of a to-be-assessed-area within a target time period, and a volume of retention water flowing into and retained in the soil of the to-be-assessed-area within the target time period; and determining a water shortage risk indicator of the to-be-assessed-area indicating a degree of water shortage risk of the to-be-assessed-area, according to a ratio of the volume of blue water to the volume of retention water. A higher ratio of the volume of blue water to the volume of retention water indicates poor ability of the soil's water to meet the demand for use and greater degree of the water shortage risk of the soil.

    Electrostatic energy collector and electrostatic energy collecting method

    公开(公告)号:US10790765B2

    公开(公告)日:2020-09-29

    申请号:US15562746

    申请日:2015-10-20

    Inventor: Fei Wang

    Abstract: An electrostatic energy collector and an electrostatic energy collecting method. The electrostatic energy collector comprises: a vibrating table (101), the vibrating table being fixedly connected to a first end of a first cross beam (102) and a first end of a second cross beam (103), the first cross beam being parallel to the second cross beam, a vertical projection of the first cross beam being overlapped with that of the second cross beam, both of the first cross beam and the second cross beam being conductors, a first mass block (104) being fixedly arranged on the first cross beam, an electret layer (106) being coated at the side, close to the first cross beam, of the second cross beam, a second mass block (105) being fixed at the sided, facing away from the first cross beam, of the second cross beam, a first lead (107) being connected to the first cross beam and a first end of a load (109), and a second lead (108) being connected to the cross beam and a second end of the load. The electrostatic energy collector and the electrostatic energy collecting method can improve energy connection efficiency.

    SURFACE WAVE PROSPECTING METHOD AND ACQUISITION EQUIPMENT

    公开(公告)号:US20190113642A1

    公开(公告)日:2019-04-18

    申请号:US16000471

    申请日:2018-06-05

    CPC classification number: G01V1/306 G01V1/247 G01V1/282 G01V1/284 G01V1/307

    Abstract: The technical solution of the present application is applicable to the technical field of geophysical exploration, and provides a surface wave prospecting method and an acquisition equipment. This method comprises: obtaining vibration data by a vibration collecting device; calculating a dispersion graph by applying a vector wavenumber transform method to the vibration data, extracting dispersion curves from the dispersion graph, wherein the dispersion curves include fundamental mode and higher modes of dispersion curves of surface wave; establishing an initial stratigraphic model according to the dispersion graph; and performing a dispersion curves inversion based on the initial stratigraphic model and an inversion algorithm. The present technical solution can extract dispersion information of higher modes of surface wave from vibration data for reducing the non-uniqueness of inversion; computation time of the inversion algorithm can be reduced by establishing the initial stratigraphic model, and the instability of the inversion algorithm can be reduced, too. In this way, vibration collecting devices can be arranged arbitrarily, the requirement for the site layout is reduced, and the adaptability of surface wave prospecting is improved.

    METHOD, DEVICE, SYSTEM AND MEDIUM FOR CLASSIFYING GREEN-BLUE-GRAY INFRASTRUCTURE

    公开(公告)号:US20240371133A1

    公开(公告)日:2024-11-07

    申请号:US18556730

    申请日:2022-11-29

    Abstract: A method, device, system, and medium for classifying green-blue-gray infrastructure. The method includes obtaining a multispectral photo corresponding to a target area, and obtaining an image set of a target and a color orthophoto, based on the multispectral photo; obtaining a sample file based on the color orthophoto, and obtaining a classification result of the green-blue-gray infrastructure corresponding to the target area based on the image set of the target and the sample file. The embodiments can obtain the image set of the target and the color orthophoto based on the multispectral photo corresponding to the target area and combine the sample file obtained from the color orthophoto with the image set of the target to obtain the classification result of the green-blue-gray infrastructure corresponding to the target area, thereby improving the accuracy and efficiency for classifying the green-blue-gray infrastructure.

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