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1. 发明授权

US11428715B2 Current measurement device 有权
公开(公告)号：US11428715B2
公开(公告)日：2022-08-30
申请号：US16640127
申请日：2018-07-20
申请人： KOA CORPORATION
发明人： Tamotsu Endo
IPC分类号： G01R19/00 , G01R1/20 , G01R1/30
摘要： A current measurement device comprising: a shunt resistor; a pair of first and second voltage signal lines connected to the shunt resistor; and a current measurement circuit for measuring a current using a signal by the pair of first and second voltage signal lines. The pair of first and second voltage signal lines are connected to an amplifier circuit with which the current measurement circuit is provided to amplify a voltage signal. A third signal line which is a signal line different from the pair of first and second voltage signal lines and drawn from the shunt resistor is connected to a common line of the current measurement circuit.

2. 发明授权

US11193957B2 Shunt resistor averaging techniques 有权
公开(公告)号：US11193957B2
公开(公告)日：2021-12-07
申请号：US16539404
申请日：2019-08-13
申请人： Analog Devices International Unlimited Company
发明人： Hio Leong Chao
IPC分类号： G01R15/14 , G01R1/30 , H01L23/528 , H01L23/522 , H03F3/45 , G01R19/25
摘要： Techniques for improving current sensing via a shunt resistance are provided. In an example, an apparatus for sensing current can include a substrate, and a plurality of metal layers stacked on the substrate and separated from the substrate and from each other by an insulation material. In certain examples, a first one or more metal layers can form a sense resistance configured to pass current between a source and a load, and a second one or more metal layers can form one or more gain resistances coupled to the sense resistance and configured to couple to a current sense amplifier. In some example, a metal layer can include portions of both the sense resistance and the gain resistance to compensate for environmental anomalies, material anomalies or manufacturing anomalies.

3. 发明授权

US11163012B2 Energization evaluation test equipment of a PWM converter input filter 有权
公开(公告)号：US11163012B2
公开(公告)日：2021-11-02
申请号：US16273430
申请日：2019-02-12
申请人： Toshiba Mitsubishi-Electric Industrial Systems Corporation
发明人： Ryo Iida
IPC分类号： G01R1/30 , H02M1/12 , G01R31/40 , H02M1/00 , H02M7/217 , H03K7/08
摘要： An energization evaluation test equipment for an input filter of a large capacity PWM converter by reducing the power supply capacity to the equipment under test is provided. The energization evaluation test is equivalent to an actual load test. An equipment under test has an input filter connected to an output terminal of an AC power source and a PWM converter connected to an output terminal of the input filter to convert an AC power source to a DC power source. The evaluation test equipment includes a PWM converter input filter and a PWM converter configured similarly to the PWM converter input filter and the PWM converter of the equipment under test, respectively, a direct current reactor connected to an output terminal of a PWM converter of the equipment under test, a PWM controller for controlling the PWM converter of the equipment under test and controlling the PWM converter of the energization evaluation test equipment, wherein, outputs of the PWM converter of the equipment under test and the PWM converter of the energization evaluation test equipment are connected in series via the direct current reactor, and the PWM controller is performed so that the output voltage of the PWM converter of the equipment under test becomes a desired value and the output current of the PWM converter of the energization evaluation test equipment becomes a desired value.

4. 发明申请

US20210328583A1 MONITOR CIRCUIT FOR MONITORING A LIGHTNING PROTECTION COMPONENT 有权
公开(公告)号：US20210328583A1
公开(公告)日：2021-10-21
申请号：US17356915
申请日：2021-06-24
申请人： SAFRAN ELECTRONICS & DEFENSE
发明人： Olivier MELINE , François GUILLOT
IPC分类号： H03K17/082 , G01R1/20 , G01R1/30
摘要： A switching circuit comprising a transistor (23) and a drive component both for controlling the transistor and also for limiting the power supply current (Ia) suppled to a load (22), the drive component being arranged both to receive a control voltage (VH) and also: when the control voltage (VH) is disconnection signal, to generate a drive voltage (VP) that causes the transistor to occupy a non-conductive state; when the control voltage (VH) is a connection signal and the power supply current (Ia) cannot reach a predefined current threshold, to generate drive voltage (VP) that causes the transistor to occupy saturated conditions; and when the control voltage (VH) is a connection signal and the power supply current (Ia) can reach a predefined current threshold, to generate a drive voltage (VP) that causes the transistor to occupy linear conditions, such that the power supply current is regulated so that it does not exceed the predefined current threshold.

5. 发明申请

US20210231749A1 Devices, Systems and Processes for Capacitor Testing 有权
公开(公告)号：US20210231749A1
公开(公告)日：2021-07-29
申请号：US17226574
申请日：2021-04-09
申请人： DISH Network L.L.C.
发明人： Rodney Davis , Jamie Metzger , Ken Jones
IPC分类号： G01R31/64 , G01R1/30
摘要： Devices, systems, and processes for testing capacitors are disclosed. A system includes a digital signal processor configured to execute non-transient computer executable instructions for testing a device over at least three operating modes. The operating modes may include a start-up mode, during which the digital signal processor is configured to control initial charging of the device to a desired initial condition, a charge mode, during which the digital signal processor is configured to control replenishment of electrical energy in the device, and a test mode, during which the digital signal processor is configured to control testing of the device in accordance with at least one testing protocol. The device may include an energy capture circuit configured to capture recovered energy arising during a first test cycle and to provide the recovered energy to the device for use during a second test cycle.

6. 发明授权

US11022629B2 Low-glitch range change techniques 有权
公开(公告)号：US11022629B2
公开(公告)日：2021-06-01
申请号：US16525257
申请日：2019-07-29
申请人： Analog Devices, Inc.
发明人： Stefano I. D'Aquino , Jennifer W. Pierdomenico , Edward L. Collins
IPC分类号： G01R1/30 , H03F3/45
摘要： Techniques are provided for changing a range of an output circuit with little or no voltage or current glitch. In an example, a method of changing a range of an output signal can include providing a first level of the output signal at an output of a first amplifier based on a received setpoint signal and receiving a range change command. In response to the range change command an input of a second amplifier can be shorted to an output of the second amplifier for a first interval. At the end of the first interval and over a second interval, a first impedance between the input of the second amplifier and the output of the second amplifier can be increased, and a second impedance between the input of the second amplifier and the setpoint signal can be increased.

7. 发明授权

US10416191B2 Method for validation of a fuse head in an electronic detonator 有权
公开(公告)号：US10416191B2
公开(公告)日：2019-09-17
申请号：US15562831
申请日：2016-03-29
申请人： MaxamCorp Holding, S.L.
发明人： Luis Diego Montaño Rueda , Hendrik Van Niekerk , José Manuel Botija González , Íñigo Zabalo Arena
IPC分类号： G01R31/07 , G01R1/067 , F42C19/00 , F42C21/00 , G01R31/04 , F41A19/58 , F42B3/12 , F42C11/02 , F42C15/40 , G01R1/30 , H01R13/627 , H01R13/637
摘要： A method for the validation of a fuse head in an electronic detonator is disclosed, the method including measuring at least once a first charge time; activating a switching means to a second position to replace a reference resistor in an RC circuit with the fuse head; measuring at least once a second charge time; and determining the deviation of the second charge time from the first charge time.

8. 发明授权

US10359450B1 Current sensing probe incorporating a current-to-voltage conversion circuit 有权
公开(公告)号：US10359450B1
公开(公告)日：2019-07-23
申请号：US15402324
申请日：2017-01-10
申请人： Keysight Technologies, Inc.
发明人： Alexander Oliva , Edward Vernon Brush, IV
IPC分类号： G01R15/18 , G01R19/00 , G01R1/30 , G01R19/25
摘要： Generally, in accordance with the various illustrative embodiments disclosed herein, a current sensing probe includes a current-to-voltage conversion circuit that not only presents a desirable impedance into an inductive current sensing element of the current sensing probe, but also remains operationally stable over a wide range of frequencies when measuring a current flowing through a device-under-test. The wide frequency range can extend down to some low frequencies that can prove challenging to conventional current sensing probe circuits.

9. 发明申请

US20190222176A1 ENVELOPE TRACKING CIRCUIT 审中-公开
公开(公告)号：US20190222176A1
公开(公告)日：2019-07-18
申请号：US15966329
申请日：2018-04-30
申请人： Qorvo US, Inc.
发明人： Nadim Khlat
IPC分类号： H03F1/02 , G01R1/30 , H03F3/189
CPC分类号： H03F3/19 , G01R1/30 , H03F1/0227 , H03F3/189 , H03F3/20 , H03F2200/102 , H03F2200/336 , H03F2200/451
摘要： An envelope tracking (ET) circuit is provided. The ET circuit includes an amplifier array(s) configured to amplify a radio frequency (RF) signal(s) based on a first input voltage and a second input voltage. The ET circuit includes a pair of tracker circuits each configured to generate a modulated voltage. Control circuitry couples a selected tracker circuit among the tracker circuits to provide a selected modulated voltage (e.g., ET modulated voltage) to the amplifier array(s) as the first input voltage. Depending on usage scenarios, the control circuitry also provides an ET modulated voltage, an average power tracking (APT) modulated voltage, or a constant voltage to the amplifier array(s) as the second input voltage. As such, the ET circuit can support the RF signal(s) modulated in a wide range of modulation bandwidth without compromising efficiency and/or increasing heat dissipation of the amplifier array(s).

10. 发明申请

US20190173371A1 ENERGIZATION EVALUATION TEST EQUIPMENT OF A PWM CONVERTER INPUT FILTER 审中-公开
公开(公告)号：US20190173371A1
公开(公告)日：2019-06-06
申请号：US16273430
申请日：2019-02-12
申请人： Toshiba Mitsubishi-Electric Industrial Systems Corporation
发明人： Ryo IIDA
IPC分类号： H02M1/12 , H02M7/217 , G01R31/02 , G01R1/30
摘要： An energization evaluation test equipment for an input filter of a large capacity PWM converter by reducing the power supply capacity to the equipment under test is provided. The energization. evaluation test is equivalent to an actual load test. An equipment under test has an input filter connected to an output terminal of an AC power source and a PWM converter connected to an output terminal of the input filter to convert an AC power source to a DC power source. The evaluation test equipment includes a PWM converter input filter and a PWM converter configured similarly to the PWM converter input filter and the PWM converter of the equipment under test, respectively, a direct current reactor connected to an output terminal of a PWM converter of the equipment under test, a PWM controller for controlling the PWM converter of the equipment under test and controlling the PWM converter of the energization evaluation test equipment, wherein, outputs of the PWM converter of the equipment under test and the PWM converter of the energization evaluation test equipment are connected in series via the direct current reactor, and the PWM controller is performed so that the output voltage of the PWM converter of the equipment under test becomes a desired value and the output current of the PWM converter of the energization evaluation test equipment becomes a desired value.

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