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公开(公告)号：US20240297682A1
公开(公告)日：2024-09-05
申请号：US17796410
申请日：2020-01-29
发明人： Tianhao Xiong , Dongyang Tian , Gang Wu
IPC分类号： H04B5/77
CPC分类号： H04B5/77
摘要： In one aspect, the NFC device includes an antenna that includes first and second terminals, a first resistor on a first current path, and a second resistor on a second current path. The NFC device includes a first switch that switches between open and closed states, where the first switch couples the first current path to the first terminal in the closed state. The NFC device includes a second switch that switches between open and closed states, where the second switch couples the second current path to the second terminal in the closed state. The NFC device includes a controller in communication with the first and second switches and configured to set a Q factor of the antenna to a first or second value by operating the first and second switches.
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公开(公告)号：US20240250407A1
公开(公告)日：2024-07-25
申请号：US18557901
申请日：2021-05-13
发明人： Tianhao XIONG , Chaolian LIANG
CPC分类号： H01Q1/2216 , H01Q1/38 , H01Q7/00 , H01Q21/28 , H02J50/10
摘要： A near field communication (NFC) reader includes an NFC antenna and a wireless charging antenna. The NFC antenna substantially surrounds the wireless charging antenna laterally, except at an inward bend of the NFC antenna. The NFC antenna overlaps the wireless charging antenna at the bend.
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公开(公告)号：US20230400359A1
公开(公告)日：2023-12-14
申请号：US17836817
申请日：2022-06-09
发明人： Dino COSTANZO , Yan ZHANG , Guixi SUN
摘要： A three-phase load is powered by an SPWM driven inverter having a single shunt-topology. During operation, drain-to-source resistances of transistors of each branch of the inverter are determined. Interpolation is performed on assumed drain-to-source resistances of the transistors for different temperatures to produce a non-linear model of drain-to-source resistance to temperature for the transistors, and the drain-to-source resistances determined during operation and the non-linear model are used to estimate temperature values of the transistors. Driving of the inverter can be adjusted so that conductivity of each branch is set so that power delivered by that branch is as high as possible without exceeding an allowed drain current threshold representing a threshold junction temperature. In addition, driving of the inverter can be ceased if the temperature of a transistor exceeds the threshold temperature.
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4.发明申请公开(公告)号：US20190317537A1
公开(公告)日：2019-10-17
申请号：US16451601
申请日：2019-06-25
发明人： Zhenghao CUI , Fei Wang , Ming Jiang
摘要： A voltage regulator includes two input pairs of opposite type transistors, p-type and n-type, to provide a soft-start functionality for gradually increasing the voltage regulator's output voltage from zero, or a voltage below the thresholds of the n-type transistors, to an operational voltage. The voltage regulator operates in a soft-start mode during which a variable input voltage signal is ramped up to allow the output voltage to reach the operational voltage, and a normal-operation mode during which the operational voltage is maintained.
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公开(公告)号：US20170353110A1
公开(公告)日：2017-12-07
申请号：US15683143
申请日：2017-08-22
发明人： Ming Jiang
CPC分类号： H02M3/1588 , H02M1/08 , H02M1/44 , H02M3/158 , H03K17/166 , H03K17/687
摘要： A switching regulator includes circuitry for reducing conductive emissions caused when the regulators switch from one transistor switch to the other. The switching regulator includes at least one switch with a diode connected from the source to the drain of at least one of the transistor switches. When the regulator switches from one transistor switch to the other, the circuitry initiates turning on the switch with a relatively small, current-limited signal, waits for the diode across the recently turned off switch to complete reverse recovery, and then quickly turns the new switch fully on.
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公开(公告)号：US09774260B2
公开(公告)日：2017-09-26
申请号：US14690855
申请日：2015-04-20
发明人： Ming Jiang
CPC分类号： H02M3/1588 , H02M1/08 , H02M1/44 , H02M3/158 , H03K17/166 , H03K17/687
摘要： A switching regulator includes circuitry for reducing conductive emissions caused when the regulators switch from one transistor switch to the other. The switching regulator includes at least one switch with a diode connected from the source to the drain of at least one of the transistor switches. When the regulator switches from one transistor switch to the other, the circuitry initiates turning on the switch with a relatively small, current-limited signal, waits for the diode across the recently turned off switch to complete reverse recovery, and then quickly turns the new switch fully on.
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公开(公告)号：US09651965B2
公开(公告)日：2017-05-16
申请号：US14880614
申请日：2015-10-12
发明人： Zhenghao Cui , Ming Jiang
CPC分类号： G05F1/575
摘要： A linear regulator circuit includes a power transistor coupled between an input voltage node and an output voltage node. A control circuit of the linear regulator includes a feedback network having an input coupled to the output voltage node and an output configured to generate a feedback voltage. An error amplifier receives a reference voltage and the feedback voltage to generate an error signal. A driver circuit receives the error signal and has an output coupled to drive a control terminal of the power transistor. A first power supply terminal of the driver circuit is coupled to a first power supply node and a second power supply terminal of the driver circuit is coupled to the output voltage node. The bias current for operation of the driver circuit is accordingly directly sourced to the output voltage node to support low quiescent current operation of the regulator circuit.
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公开(公告)号：US09506755B2
公开(公告)日：2016-11-29
申请号：US14308076
申请日：2014-06-18
CPC分类号： G01C17/38 , G01C17/28 , G01R33/007 , G01R33/0082
摘要： Apparatus and methods to compensate hard iron and soft iron magnetic interference in magnetic sensing devices are described. Hard and soft iron interference may be modeled using an ellipsoidal surface generated by a plurality of magnetic field measurements. A displacement of the ellipsoid from a reference frame origin corresponds to hard iron or permanent magnetic field interference. A shape and orientation of the ellipsoid corresponds to soft iron magnetic field interference. The ellipsoidal surface may be analyzed to obtain magnetic field compensation values for cancelling hard iron and soft iron interference.
摘要翻译： 描述了用于补偿磁感测装置中的硬铁和软铁磁干扰的装置和方法。 可以使用由多个磁场测量产生的椭圆面来建模硬和软铁的干扰。 椭圆体与参考框架原点的位移对应于硬铁或永久磁场干扰。 椭圆体的形状和取向对应于软铁磁场干扰。 可以分析椭圆面以获得用于消除硬铁和软铁干扰的磁场补偿值。
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公开(公告)号：US20240086891A1
公开(公告)日：2024-03-14
申请号：US18242980
申请日：2023-09-06
发明人： Pierre RIZZO , Laurent TRICHEUR
CPC分类号： G06Q20/3278 , H04B5/0031
摘要： A first near-field communication device detects the presence of a second near-field communication device located within range. In response to that detection, there is an initiation of a near-field communication between the first and second devices. In case of a failure of the initiation of the near-field communication, instead an initiation of a contactless bank transaction between the first and second devices occurs.
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公开(公告)号：US20230258682A1
公开(公告)日：2023-08-17
申请号：US17651451
申请日：2022-02-17
发明人： Daopeng Fu
摘要： A method of processing information of a rotating wheel includes measuring angular velocity of a rotating wheel with a gyroscopic sensor, determining an instantaneous position of the rotating wheel with an accelerometer, and determining the angular positions of the rotating wheel based on the measured angular velocity and the instantaneous position of the rotating wheel. The gyroscopic sensor and the accelerometer are mounted on the rotating wheel.
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