公开(公告)号：US11973138B2

公开(公告)日：2024-04-30

申请号：US17588119

申请日：2022-01-28

申请人： Transphorm Technology, Inc.

发明人： Geetak Gupta ,  Umesh Mishra ,  Davide Bisi ,  Rakesh K. Lal ,  David Michael Rhodes

IPC分类号： H03K17/68 ,  H01L27/06 ,  H01L29/20 ,  H01L29/205 ,  H01L29/40 ,  H01L29/778 ,  H03K17/687

CPC分类号： H01L29/7786 ,  H01L27/0605 ,  H01L29/2003 ,  H01L29/205 ,  H01L29/404 ,  H03K17/6871

摘要： Described herein are lateral III-N (e.g., GaN) devices having a III-N depleting layer. A circuit includes a depletion-mode transistor with a source connected to a drain of an enhancement-mode transistor. The gate of the depletion-mode transistor and the gate of the enhancement-mode transistor are biased at zero volts, and the drain of the depletion-mode transistor is biased at positive voltage to block a current in a forward direction. Then, the bias of the gate of the enhancement-mode transistor is changed to a first voltage greater than the threshold voltage of the enhancement-mode transistor and a first current is allowed to flow through the channel in a forward direction. Then, the bias of the gate of the depletion-mode transistor is changed to a second voltage and a second current is allowed to flow through the channel in a forward direction where the second current is greater than the first current.

公开(公告)号：US11575374B2

公开(公告)日：2023-02-07

申请号：US16867333

申请日：2020-05-05

申请人： STMicroelectronics (Grenoble 2) SAS

发明人： Renald Boulestin

IPC分类号： H03K17/68 ,  H03K17/687

摘要： The present disclosure concerns a device for supplying an adjustable current configured to supply discrete values of the current belonging to different current ranges, with a pitch between two successive discrete values determined by that of said ranges to which each of the two successive discrete values belongs.

公开(公告)号：US10191021B2

公开(公告)日：2019-01-29

申请号：US14689326

申请日：2015-04-17

申请人： Deere & Company

发明人： Brij N. Singh

IPC分类号： G01N33/00 ,  G01R19/04 ,  G01K7/42 ,  H03K3/282 ,  H03K17/68

摘要： A detector measures turn-off voltage change with respect to change in time between a collector and emitter of a transistor and peak voltage of the transistor at the collector. An electronic data processor determines intermediate parameters of turn-off current, the turn-on current and on-state voltage drop based on the turn-off voltage change and the peak voltage. The data processor determines the power or energy loss for one switching cycle of the transistor based on the turn-off current, the turn-on current and on-state voltage drop between the collector and emitter of the transistor. The data processor estimates an associated average die temperature for the transistor over the switching cycle.

公开(公告)号：US20170373684A1

公开(公告)日：2017-12-28

申请号：US15191972

申请日：2016-06-24

申请人： Cree, Inc.

发明人： Yuequan Hu ,  Amruteshwar Hiremath ,  Kory A. Liszt

IPC分类号： H03K17/68

CPC分类号： H03K17/68 ,  H03K17/72 ,  H03K2217/0009 ,  H03K2217/0054

摘要： A high reliability AC load switching circuit is disclosed. In some embodiments, the AC load switching circuit includes a high-speed switch connected between the load and the voltage source, a cutoff switch connected between the load and the voltage source in parallel with the high-speed switch, and a level detector connected to the voltage source and to a control input of the high-speed switch. The high-speed switch may be a solid-state switch, for example, a TRIAC or a bidirectional switch, and the cutoff switch may be an electromechanical switch, for example, a relay. In some embodiments a snubber is connected in parallel with a solid-state switch. In some embodiments a microcontroller is connected to an eletromechanical switch and the level detector. In some embodiments, both a first cutoff switch and a second cutoff switch are used.

公开(公告)号：US20170310313A1

公开(公告)日：2017-10-26

申请号：US15612998

申请日：2015-12-04

申请人： Joulwatt Technology Inc. Limted

发明人： Pitleong Wong ,  Yang Lu ,  Yue Ji ,  Yuancheng Ren ,  Xunwei Zhou

IPC分类号： H03K5/1536 ,  H03K5/24 ,  G01R19/175 ,  H03K17/68 ,  H03K17/13

CPC分类号： H03K5/1536 ,  G01R19/0084 ,  G01R19/175 ,  H03K5/2454 ,  H03K5/2463 ,  H03K17/133 ,  H03K17/68 ,  H05B33/0815

摘要： A circuit and a method for detecting a current zero-crossing point, and a circuit and method for detecting a load voltage are disclosed. The circuit for detecting current zero-crossing point includes: a load power supply circuit (14), a voltage-dividing resistor (16), a transistor switch (15), a zero-crossing detection circuit (19); the load power supply circuit (14) includes: a load (11), a diode (13), and an inductor (12); one end of the load power supply circuit (14) is connected with the operating voltage input terminal, the other end of the load power supply circuit (14) is connected with a first end of the transistor switch (15) and a first end of the voltage-dividing resistor (16), a second end of the voltage-dividing resistor (16) and a second end of the transistor switch (15) are connected with the ground, the load voltage is controlled by the transistor switch (15), the voltage-dividing terminal of the voltage-dividing resistor (16) is connected to a signal input terminal of the zero-crossing detection circuit (19), the zero-crossing detection circuit (19) is used to determine whether the current of the diode (13) crosses zero to obtain the on time of the diode (13), and the circuit for detecting load voltage uses the on time of the diode (13) and the on time of the transistor switch (15) to obtain the load voltage. The circuits are simple, but with high detection efficiency and low cost.

公开(公告)号：US09787298B2

公开(公告)日：2017-10-10

申请号：US15267085

申请日：2016-09-15

申请人： Ideal Power Inc.

发明人： William C. Alexander ,  Richard A. Blanchard

IPC分类号： H01L29/73 ,  H03K17/06 ,  H01L29/16 ,  H01L29/735 ,  H01L27/06 ,  H01L29/10 ,  H01L29/08 ,  H03K17/66 ,  H03K17/68 ,  H01L29/747

CPC分类号： H01L29/0619 ,  H01L27/0694 ,  H01L29/0808 ,  H01L29/0821 ,  H01L29/1004 ,  H01L29/1008 ,  H01L29/16 ,  H01L29/66295 ,  H01L29/732 ,  H01L29/735 ,  H01L29/7393 ,  H01L29/747 ,  H03K17/06 ,  H03K17/08112 ,  H03K17/66 ,  H03K17/665 ,  H03K17/68 ,  H03K2217/0054 ,  H03K2217/0063 ,  H03K2217/0072

摘要： Methods and systems for operating a double-base bidirectional power bipolar transistor. Two timing phases are used to transition into turn-off: one where each base is shorted to its nearest emitter/collector region, and a second one where negative drive is applied to the emitter-side base to reduce the minority carrier population in the bulk substrate. A diode prevents reverse turn-on while negative base drive is being applied.

公开(公告)号：US09722608B2

公开(公告)日：2017-08-01

申请号：US15217294

申请日：2016-07-22

申请人： Mercury Systems, Inc.

发明人： Robert V. Lazaravich

IPC分类号： H03K5/08 ,  H03K19/0185 ,  G05B19/05 ,  H03K17/68 ,  H03K17/795

CPC分类号： H03K19/018507 ,  G05B19/054 ,  H03K5/08 ,  H03K17/68 ,  H03K17/7955

摘要： Various systems may benefit from interfaces for handling multiple types of inputs. For example, a device with a trigger input from an external device may benefit from an isolated logic level trigger that is capable of addressing multiple types and values of voltage. An apparatus can include an input configured to receive an external trigger input signal having a trigger input voltage. The apparatus can also include circuitry configured to automatically adjust the trigger input voltage to a value configured to be compatible with a provided attached system. A working range of the trigger input voltage can exceed a compatible working range of the provided attached system.

公开(公告)号：US08823472B2

公开(公告)日：2014-09-02

申请号：US13885094

申请日：2012-04-03

申请人： Kouetsu Takaya ,  Yasuhiro Naka ,  Kenji Suzuki ,  Yuichi Yamamoto ,  Yuji Shiba

发明人： Kouetsu Takaya ,  Yasuhiro Naka ,  Kenji Suzuki ,  Yuichi Yamamoto ,  Yuji Shiba

IPC分类号： H01H63/02 ,  H01H51/06 ,  H03K17/68 ,  H01H50/16 ,  H01H50/38 ,  H01H9/44 ,  H01H1/06 ,  H01H50/14

CPC分类号： H01H1/06 ,  H01H9/443 ,  H01H50/14 ,  H01H50/163 ,  H01H50/22 ,  H01H50/38 ,  H01H50/42 ,  H01H51/065 ,  H03K17/68

摘要： An electromagnetic contactor has a contact device having a pair of fixed contacts and a movable contact; and an electromagnet unit including an exciting coil driving a movable plunger connected through a connecting shaft. The contact device is configured such that L-shaped portions have a contact portion formed in the pair of fixed contacts fixed maintaining a predetermined interval, and two ends of the movable contact are disposed to be capable of contacting to and separating from the contact portions of the L-shaped portion on a side opposite to that of the electromagnet unit. The electromagnet unit includes a magnetic yoke enclosing a plunger drive portion, a movable plunger having a leading end protruding through an aperture formed in the magnetic yoke and urged by a return spring, and a ring-form permanent magnet magnetized in a movable direction of the movable plunger and fixed to enclose a peripheral flange portion.

摘要翻译： 电磁接触器具有接触装置，该触点装置具有一对固定触头和可动触点; 以及包括驱动通过连接轴连接的活动柱塞的励磁线圈的电磁体单元。 接触装置被构造成使得L形部分具有形成在一对固定触点中的接触部分，固定保持预定间隔，并且可动触头的两端设置成能够接触和分离接触部分的接触部分 在与电磁体单元相反的一侧的L形部分。 电磁体单元包括一个包围柱塞驱动部分的磁轭，一​​个可移动的柱塞，其前端通过形成在磁轭中的孔而突出，并由复位弹簧推动，以及沿着可移动方向磁化的环形永磁体 活动柱塞并固定以包围周边凸缘部分。

公开(公告)号：US20110026285A1

公开(公告)日：2011-02-03

申请号：US12922034

申请日：2010-01-18

申请人： Reiji Kawashima ,  Kazushi Hisayama ,  Hiroshima Hibino ,  Morimitsu Sekimoto ,  Toshiyuki Maeda ,  Sumikazu Matsuno

发明人： Reiji Kawashima ,  Kazushi Hisayama ,  Hiroshima Hibino ,  Morimitsu Sekimoto ,  Toshiyuki Maeda ,  Sumikazu Matsuno

IPC分类号： H02M7/25 ,  H03K17/68

CPC分类号： H02M1/4208 ,  H02M3/33576 ,  H02M5/458 ,  H03K17/664 ,  H03K17/6874 ,  H03K17/74 ,  H03K2217/0009 ,  H03K2217/0081 ,  Y02B70/126

摘要： A bidirectional switch circuit includes two switching elements connected to conduct a current in both directions. The two switching elements are connected in series to each other. Of the two switching elements, the switching element to which a reverse voltage is applied, a voltage of a source of one of the switching elements being higher than a voltage of a drain of the one, is configured to conduct a current from the source to the drain even when an on-drive signal is not being input to a gate terminal of the one.

摘要翻译： 双向开关电路包括两个开关元件，其连接以在两个方向上导通电流。 两个开关元件彼此串联连接。 在两个开关元件中，施加有反向电压的开关元件，其中一个开关元件的源极的电压高于一个开关元件的漏极的电压，被配置为将来自源极的电流传导到 漏极，即使当驱动信号未被输入到该栅极端子时。

公开(公告)号：US20050007214A1

公开(公告)日：2005-01-13

申请号：US10912160

申请日：2004-08-06

申请人： Bruce Francis Orr

发明人： Bruce Francis Orr

IPC分类号： H03H7/12 ,  H03K17/30 ,  H03K17/68 ,  H04L27/00 ,  H04L27/26 ,  H04M11/06 ,  H03H7/01

CPC分类号： H03K17/30 ,  H03K17/68 ,  H04L27/0002 ,  H04L27/2601 ,  H04M11/062

摘要： An ADSL/POTS filter includes a switchable impedance 220 which is inserted on the low frequency side of filter 2, 3, 5, 6, 7. The impedance is switched by switch 209 which is controlled by a line sensor so that the impedance is switched into the circuit when the telephone 44 goes off-hook.

摘要翻译： ADSL / POTS滤波器包括插入在滤波器2,3,5,6,7的低频侧的可切换阻抗220.阻抗由开关209切换，开关209由线传感器控制，使得阻抗被切换 当电话44摘机时进入电路。