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51. 发明授权

US11107778B2 Active shielding device and method of active shielding 有权
公开(公告)号：US11107778B2
公开(公告)日：2021-08-31
申请号：US16667837
申请日：2019-10-29
申请人： NXP B.V.
发明人： Siamak Delshadpour , Steven Daniel
IPC分类号： H03K5/24 , H01L23/00 , G06F21/87 , H03K19/20 , G05F1/56
摘要： Embodiments of an active shielding device and method for active shielding are disclosed. In an embodiment, an active shielding device includes current sources configured to generate currents, an analog wire shield unit connected to the current sources, switches connected between the current sources and the analog wire shield unit, a current to voltage converter connected to the analog wire shield unit and configured to generate a voltage in response to the currents that are generated by the current sources and a digital control sequence for the switches, a voltage comparator connected to the current to voltage converter and configured to compare the voltage that is generated by the current to voltage converters with a reference voltage, a digital active shielding unit connected to the current sources, digital logics configured to process the digital control sequence before conducting the digital control sequence through the digital active shielding unit and after conducting the digital control sequence through the digital active shielding unit to generate a first processing result signal and a second result signal, and a digital comparator configured to compare the first processing result signal with the second result signal.

52. 发明授权

US11082047B2 Low dropout linear voltage regulator 有权
公开(公告)号：US11082047B2
公开(公告)日：2021-08-03
申请号：US16320129
申请日：2017-10-16
申请人： SOUTHERN UNIVERSITY OF SCIENCE AND TECHNOLOGY
发明人： Chenchang Zhan , Yongxiong Ji , Guigang Cai , Shuangxing Zhao
IPC分类号： G05F1/10 , H03L5/02 , G05F1/56
摘要： 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.

53. 发明授权

US11073853B2 Power supply with low variation of total radiated power 有权
公开(公告)号：US11073853B2
公开(公告)日：2021-07-27
申请号：US15792786
申请日：2017-10-25
申请人： RichWave Technology Corp.
发明人： Chih-Sheng Chen , Chia-Jung Yeh
IPC分类号： G05F1/56 , H03F3/345 , G05F1/575 , H02M3/335 , H03F1/02 , H03F3/195 , H02M1/00
摘要： A power supply includes a voltage regulator, a transistor, a current-to-voltage transform circuit, and a comparator. The voltage regulator receives a control signal, a source voltage, and a control voltage, and outputs a supply voltage according to the control voltage and the control signal. The transistor has a first terminal receiving the source voltage, and a control terminal coupled to the voltage regulator. The current-to-voltage transform circuit has a first terminal coupled to a second terminal of the transistor, a second terminal for receiving a reference voltage. The comparator has a first input terminal for receiving a comparison signal, a second input terminal coupled to the first terminal of the current-to-voltage transform circuit, and an output terminal for outputting the control voltage.

54. 发明授权

US11063465B2 Switching mode front end surge protection circuit 有权
公开(公告)号：US11063465B2
公开(公告)日：2021-07-13
申请号：US15883184
申请日：2018-01-30
申请人： NovAtel Inc.
发明人： Jack Zhan
IPC分类号： H02J7/14 , H02H7/18 , H02H3/22 , G05F1/56 , H02H3/20 , H02H9/04
摘要： A switching mode front end surge protection circuit protects downstream devices from a load dump. Specifically, the switching mode front end surge protection circuit includes a metal-oxide-semiconductor field-effect transistor (MOSFET) that operates in either one of two modes based on an input voltage provided by an alternator. When the input voltage is less than a voltage threshold value, the MOSFET operates in a pass-through mode. When the input voltage is greater than the voltage threshold value, the MOSFET operates in a switching mode to oscillate between an on state and an off state.

55. 发明授权

US11050289B2 Power supply circuit, power supply device and control method 有权
公开(公告)号：US11050289B2
公开(公告)日：2021-06-29
申请号：US16415479
申请日：2019-05-17
申请人： GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP., LTD.
发明人： Chen Tian , Jialiang Zhang
IPC分类号： H02J7/00 , H02J7/06 , G05F1/56 , H02J7/02 , H02J7/10
摘要： Provided are a power supply circuit, a power supply device and a control method. The power supply circuit includes a primary rectifier unit, a modulation unit, a transformer, a secondary rectifier and filtering unit, and a control unit. In the power supply circuit, a liquid electrolytic capacitor at a primary side is removed, such that a volume of the power supply circuit is smaller, and is safe to use. Moreover, an output current of the power supply circuit has a periodically changing current value, and the control unit can control the duration of the output current in which the current value is 0.

56. 发明申请

US20210175796A1 Voltage Stabilizer 有权
公开(公告)号：US20210175796A1
公开(公告)日：2021-06-10
申请号：US16705709
申请日：2019-12-06
申请人： Mosway Semiconductor LTD
发明人： Ka Wai Ho , Chung Pui Tung , Po Wa Chow , Wing To Fan , Wan Tim Chan , Ke Wei Wang , Shu Hung Henry Chung , Chiu Sing Celement Tse
IPC分类号： H02M1/42 , H02M3/158 , G05F1/56
摘要： Disclosed herein is a fast voltage stabilizer wherein an actual voltage across a targeted electronic element is sensed. The actual voltage is compared with a reference voltage. A control signal is generated, wherein in response to the control signal, an external current path is provided to maintain current flow and stabilize the actual voltage through charging or discharging an input capacitor and a supply filtering capacitor. Under an arbitrary supply voltage variation, a fast dynamic response to regulate the voltage across the targeted electronic element is provided no matter what the operating mode of the entire electrical circuit is, including but not limited by constant current mode, constant output resistant mode and constant power mode.

57. 发明授权

US10998719B2 Overvoltage protection and linear regulator device module 有权
公开(公告)号：US10998719B2
公开(公告)日：2021-05-04
申请号：US16728589
申请日：2019-12-27
申请人： Littelfuse Semiconductor (Wuxi) Co., Ltd.
发明人： Teddy C. T. To , Wei hua Tian
IPC分类号： H02H9/04 , G05F1/618 , G05F1/56 , H01L29/866 , H02M3/07
摘要： An apparatus may include a transient voltage suppression (TVS) device array coupled to a first input terminal and a second input terminal; and a linear regulator module having a pair of inputs connected to a respective pair of outputs of the TVS device array, wherein the TVS device array includes at least one TVS diode is connected between a first output and second output of the pair of outputs to generate a first clamping voltage signal, and wherein the linear regulator module is configured to generate a second clamping voltage signal having a second clamping voltage independent of a first clamping voltage of the first clamping voltage signal received from the TVS device array.

58. 发明申请

US20210124849A1 ACTIVE SHIELDING DEVICE AND METHOD OF ACTIVE SHIELDING 有权
公开(公告)号：US20210124849A1
公开(公告)日：2021-04-29
申请号：US16667739
申请日：2019-10-29
申请人： NXP B.V.
发明人： Siamak DELSHADPOUR , Steven DANIEL
IPC分类号： G06F21/87 , H03K5/24 , G05F1/56
摘要： Embodiments of an active shielding device and method for active shielding are disclosed. In an embodiment, an active shielding device includes current sources configured to generate currents, an analog wire shield unit connected to the current sources, a current to voltage converter connected to the analog wire shield unit and configured to generate a voltage in response to the currents that are generated by the current sources, and a voltage comparator connected to the current to voltage converter and configured to compare the voltage that is generated by the current to voltage converters with a reference voltage.

59. 发明授权

US10958263B2 Drive control device, drive circuit, and vehicle 有权
公开(公告)号：US10958263B2
公开(公告)日：2021-03-23
申请号：US16813839
申请日：2020-03-10
申请人： SEIKO EPSON CORPORATION
发明人： Toshimichi Yamada , Tatsuro Shinmitsu , Kazuhiko Okawa , Hiroaki Nitta , Masahiro Hayashi
IPC分类号： H03K17/0812 , H03K17/00 , G05F1/56 , H03K17/0814
摘要： Provided is a drive control device including: a first output node coupled to a gate node of a high-side transistor; a second output node coupled to a drive node; a first transistor provided between a first power supply node and the first output node; and a current limiting circuit and a second transistor provided in series between the first output node and the second output node, in which the current limiting circuit limits a current from the drive node toward the first output node to a predetermined value. The current limiting circuit is, for example, a transistor having a direction opposite to that of the second transistor.

60. 发明授权

US10916933B2 Power control device 有权
公开(公告)号：US10916933B2
公开(公告)日：2021-02-09
申请号：US16900495
申请日：2020-06-12
申请人： Rohm Co., Ltd.
发明人： Kenichi Okajima
IPC分类号： H02H3/20 , G05F1/56 , G05F1/569 , H02H7/12 , H02H1/00 , G05F1/595 , H02M1/088 , G05F1/575 , G05F1/571 , H02M1/36 , H02M3/158 , H02M1/00
摘要： A power control device includes: an output voltage controller configured to control an output voltage based on a feedback voltage corresponding to the output voltage; and an overvoltage protector configured to continue or stop the operation of the output voltage controller based on a first detection result of whether the output voltage has exceeded an output voltage threshold value and a second detection result of whether the feedback voltage has fallen to or below a feedback voltage threshold value.

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