公开(公告)号：US20240133926A1

公开(公告)日：2024-04-25

申请号：US18546727

申请日：2022-02-14

申请人： Smart Electronics Inc.

发明人： Jeong Bok Lee ,  Dong Choon Kim ,  Dong Hwa Kim

IPC分类号： G01R19/15 ,  G01R1/04 ,  G01R1/20 ,  G01R1/30 ,  G01R15/20

CPC分类号： G01R19/15 ,  G01R1/04 ,  G01R1/203 ,  G01R1/30 ,  G01R15/202

摘要： The present invention relates to a current sensing device comprising: a bus bar including a plurality of low-resistance metal portions separated from each other with a resistance portion therebetween; a printed circuit board arranged below the bus bar; a plurality of fixing pins which are joined to the metal portions of the bus bar to fix the bus bar on the printed circuit board and provide a current path between the metal portions and the printed circuit board; and at least one Hall sensor module. At least a portion of the Hall sensor module is inserted into a sensor hole formed in at least one of the low-resistance metal portions of the bus bar.

公开(公告)号：US20240053385A1

公开(公告)日：2024-02-15

申请号：US18088945

申请日：2022-12-27

申请人： KINGFAR INTERNATIONAL INC.

发明人： Qichao ZHAO ,  Ran Yang ,  Zhao Li

IPC分类号： G01R1/30 ,  A61B5/369

CPC分类号： G01R1/30 ,  A61B5/369

摘要： Disclosed are an EEG impedance test circuit, a method, and a device. The circuit comprises a frequency selecting circuit, an amplification circuit, a follower circuit, and a power supply terminal AVCC. An input end of the frequency selecting circuit is connected to the power supply terminal AVCC, the input end of the frequency selecting circuit is further connected to the input end of the amplification circuit, an output end of the frequency selecting circuit is connected to the output end of the amplification circuit, and the output end of the amplification circuit is connected to the input end of the follower circuit; the frequency selecting circuit is configured for oscillating so as to generate an oscillation signal; and the follower circuit is configured for isolating the frequency selecting circuit and the amplification circuit; the follower circuit is configured for circuit isolation.

公开(公告)号：US20240027496A1

公开(公告)日：2024-01-25

申请号：US18256744

申请日：2021-12-03

申请人： HIOKI E.E. CORPORATION

发明人： Kazuaki HANEDA

IPC分类号： G01R1/30 ,  H03F3/45

CPC分类号： G01R1/30 ,  H03F3/45475 ,  H03F2200/129 ,  H03F2203/45526

摘要： An amplifier circuit includes an operational amplifier to amplify an input signal input to a non-inverting input terminal, first and second feedback units to feed back an output signal output from the operational amplifier to an inverting input terminal of the operational amplifier, and a coupling unit to AC couple the second feedback unit and the inverting input terminal. The first feedback unit is to, together with the coupling unit, as a frequency of the output signal of the operational amplifier is increased, reduce an electric potential to be applied to the inverting input terminal with respect to the output signal. At the same time, the second feedback unit is to generate a predetermined electric potential lower than an electric potential of the output signal, the second feedback unit being configured to apply a predetermined electric potential to the inverting input terminal via the coupling unit.

公开(公告)号：US11828780B1

公开(公告)日：2023-11-28

申请号：US17354274

申请日：2021-06-22

申请人： ZT Group Int'l, Inc.

发明人： Yung-Tsung Hsieh ,  Chi-Lin Chiu

IPC分类号： G01R27/26 ,  G01D5/24 ,  G01R1/30

CPC分类号： G01R27/2605 ,  G01D5/24 ,  G01R1/30

摘要： Systems and methods are described for reporting capacitance of a capacitor of a power backup circuit comprising a plurality of metal-oxide-semiconductor field-effect transistors (MOSFETs). The system may also include a bleeder resistor and a voltage detection circuit. When capacitance monitoring is active, a first MOSFET may be turned off, causing the capacitor to be discharged via the bleeder resistor. After predetermined time intervals, a first drain voltage and a second drain voltage of the first MOSFET may be determined using the voltage detection circuit. The drain voltage readings at the different times may be used to determine the capacitance of the capacitor, which may be used to generate and transmit a report on capacitor performance and status.

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).

公开(公告)号：US20190041463A1

公开(公告)日：2019-02-07

申请号：US15956799

申请日：2018-04-19

申请人： DENSO CORPORATION

发明人： Kazutaka HONDA ,  Tomoya YAMADA

IPC分类号： G01R31/36 ,  H02J7/00

CPC分类号： G01R31/3835 ,  G01R1/30 ,  G01R15/002 ,  G01R31/3842 ,  H02J7/0021 ,  H02J2007/005

摘要： A voltage sensing device includes: a multiplexer configured to choose either two corresponding voltages at two voltage sensing target nodes or two corresponding voltages at the terminals of a shunt resistor, and output either the two corresponding voltages at the two voltage sensing target nodes or the two corresponding voltages at the terminals of the shunt resistor, which are chosen by the multiplexer, as a first output voltage and a second output voltage; a differential switched capacitor amplifier circuit including a sampling capacitor and a feedback capacitor and configured to sample the first output voltage and the second output voltage through the sampling capacitor, and output sensing voltages corresponding to the first output voltage and the second output voltage by transferring a charge stored in the sampling capacitor through the feedback capacitor; and an operation control unit configured to control the multiplexer and the differential switched capacitor amplifier circuit.

公开(公告)号：US20180088152A1

公开(公告)日：2018-03-29

申请号：US15712771

申请日：2017-09-22

申请人： Microchip Technology Incorporated

发明人： Dong Wang ,  Jim Nolan ,  Kumen Blake

IPC分类号： G01R15/14 ,  G01R1/30 ,  H01L23/60 ,  H03F3/217

CPC分类号： G01R15/146 ,  G01R1/30 ,  G01R19/0023 ,  H01L23/60 ,  H03F3/2171 ,  H03F3/393 ,  H03F3/45475 ,  H03F2200/171

摘要： A high side current sensing amplifier architecture is simplified and improved over prior art current sensing amplifier circuits by using chopping only, without requiring auto-zeroing, and by using a simpler (and faster) switched capacitor filter instead of an auto-zeroing integrator filter. Also, VIP (positive DC sense node) is merged with the VDDHV (power supply) node, such that the integrated circuit package requires only a single node (package pin) to accommodate both the VIP and VDDHV connections for the current sensing amplifier circuit, resulting in being able to use a smaller integrated circuit package. A small resistor is coupled between VIP and VDDHV to reduce the offset considerably. A low latency time high voltage level shifter is provided which is essential for precise chopping operation.

公开(公告)号：US20170285070A1

公开(公告)日：2017-10-05

申请号：US15476679

申请日：2017-03-31

申请人： KEITHLEY INSTRUMENTS, LLC

发明人： GREGORY SOBOLEWSKI ,  MICHAEL D. RAYMAN ,  NATHAN A. SCHATT

IPC分类号： G01R1/44 ,  G01R15/12 ,  G01R13/22

CPC分类号： G01R1/44 ,  G01R1/30 ,  G01R15/125

摘要： An electronic test measurement system can include a device under test (DUT) and an electronic test instrument that includes a signal input configured to receive an electrical signal from the DUT, a cooling mechanism, and a processor. The processor can be configured to determine a frequency at which the cooling mechanism should operate, cause the cooling mechanism to operate at the determined frequency, select a filter based on the determined frequency, and apply the filter to the electrical signal to reduce interference with the electrical signal resulting from mechanical vibrations of the cooling mechanism.

公开(公告)号：US20170131326A1

公开(公告)日：2017-05-11

申请号：US14937297

申请日：2015-11-10

申请人： QualiTau, Inc.

发明人： Jens ULLMANN

IPC分类号： G01R1/30 ,  G01R31/28

CPC分类号： G01R1/30 ,  G01R31/2841 ,  G01R31/2858 ,  G01R31/31924

摘要： Pulsed current circuitry for electromigration testing of semiconductor integrated circuits and components. The circuit includes a multiplexer that outputs analog voltage pulses, and is capable of generating both bipolar and unipolar voltage pulses. At least one operational amplifier and resistor receive the voltage pulses from the multiplexer and convert the voltage pulses to current pulses. A charge booster circuit is provided for minimizing overshoots and undershoots during transitions between current levels in the test circuit.

公开(公告)号：US20170115330A1

公开(公告)日：2017-04-27

申请号：US14724784

申请日：2015-05-28

申请人： Infineon Technologies AG

发明人： Mario MOTZ

IPC分类号： G01R19/00 ,  G01R1/30 ,  G01R31/34

CPC分类号： G01R19/0053 ,  G01R1/30 ,  G01R19/003 ,  G01R19/0092 ,  G01R31/343 ,  H03M1/0658 ,  H03M1/0863 ,  H03M1/12 ,  H03M3/326 ,  H03M3/376 ,  H03M3/424 ,  H03M3/462

摘要： Provided are apparatuses and methods, in which a disturbed measurement variable is converted to a digital signal. The digital signal is then averaged over a number of sampling values which corresponds to a period of the disturbances.