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公开(公告)号：US20240133921A1
公开(公告)日：2024-04-25
申请号：US17972297
申请日：2022-10-23
IPC分类号： G01R1/07 , G01R15/22 , G01R19/00 , G01R19/252 , G01R31/302
CPC分类号： G01R1/071 , G01R15/22 , G01R19/0084 , G01R19/252 , G01R31/3025
摘要： A system and method are provided for compensating for thermal drift of a probe device. The method includes monitoring a first temperature of a laser source in a sensor head that receives output electrical signals from a DUT and outputs corresponding optical signals; monitoring a second temperature of a photoreceiver in a probe interface that converts the optical signals to electrical test signals to input to the test instrument; calculating a first value of a first bias voltage using the first temperature; applying the first value of the first bias voltage to the laser source to compensate for thermal drift when the first temperature is within a first predefined temperature range; calculating a second value of a second bias voltage for the photoreceiver using the second temperature; and applying the second value of the second bias voltage to the photoreceiver to compensate for thermal drift when the second temperature is within a second predefined temperature range.
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公开(公告)号：US11846656B2
公开(公告)日：2023-12-19
申请号：US17834061
申请日：2022-06-07
发明人： Tomohiro Nezuka , Yoshikazu Furuta , Shotaro Wada
IPC分类号： G01R15/14 , G01R19/252
CPC分类号： G01R15/146 , G01R19/252
摘要： A current sensor for detecting a current based on a terminal voltage and a resistance value of a shunt resistor, includes: a resistance value correction circuit having: correction resistors; a signal application unit; a voltage detection unit that detects terminal voltages of the shunt resistor and a part of the correction resistors in a first period, and terminal voltages of all of the correction resistors in a second period; and a correction unit that corrects the resistance value for current detection based on a calculated resistance value of the shunt resistor. Resistance values and resistance accuracies of the correction resistors are higher as the plurality of correction resistors are disposed farther from the shunt resistor.
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公开(公告)号：US20230280389A1
公开(公告)日：2023-09-07
申请号：US18018100
申请日：2020-09-07
发明人： Sun Woo Kim , Jong-Phil Hong
IPC分类号： G01R31/14 , G01R19/252 , G01R19/00 , G01R27/16 , G01R13/02
CPC分类号： G01R31/14 , G01R19/252 , G01R19/0023 , G01R27/16 , G01R19/0053 , G01R13/02
摘要： An insulation monitoring device, according to various embodiment of the present application, comprising an impedance formed between a power line and a ground of a system comprises, a signal generation circuit for applying a triangular wave signal to the power line through a signal measurement circuit, the signal measurement circuit for measuring a voltage difference across the detection resistor of the signal measurement circuit or a current flowing through the detection resistor when the triangular wave signal is applied to the impedance, a control circuit for obtaining an impedance value of the impedance based on at least one of the voltage difference and the current, and monitoring the impedance value.
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公开(公告)号：US11689192B1
公开(公告)日：2023-06-27
申请号：US18069457
申请日：2022-12-21
申请人： ANRITSU CORPORATION
发明人： Hirofumi Ono , Koji Yamashita , Shinichi Ito
IPC分类号： H03K5/02 , G01R19/252 , H03H11/24
CPC分类号： H03K5/02 , G01R19/252 , H03H11/24
摘要： A signal generation unit 2, a DA converter 3, variable attenuators 40, 42, 44, and 46 that attenuate the analog signal converted by the DA converter 3, a measurement unit 6 that detects a level of the signal attenuated by the variable attenuators 40, 42, 44, and 46 and passed through one or more semiconductor components, and a control unit 7 that obtains a value of a step error, which is a correction value of an attenuation amount of the variable attenuators 40, 42, 44, and 46 in each of a plurality of steps obtained by dividing a maximum value of the attenuation amount of the variable attenuators 40, 42, 44, and 46 by a variation amount, which is a predetermined attenuation amount are included.
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公开(公告)号：US11567110B2
公开(公告)日：2023-01-31
申请号：US17564590
申请日：2021-12-29
发明人： Yung-Chieh Lin
IPC分类号： G01R19/25 , G01R19/252
摘要： A real-time power monitoring method executable by an electronic device, comprising: performing an ADC calibration operation to a voltage of a first battery of the electronic device; calculating and forming a diagonal line for the first battery; determining whether the comparison result between a gain and an offset and an optimum gain and an optimum offset is located with a preset error range; if the comparison result is located with the preset error range, determining that the voltage calibration for the first battery is successful; and, if the comparison result is located outside the preset error range, determining that the voltage calibration for the first battery is unsuccessful, analyzing and fixing the first battery and for re-performing the ADC calibration to the first battery.
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公开(公告)号：US20220283115A1
公开(公告)日：2022-09-08
申请号：US17630209
申请日：2020-10-08
发明人： Yuzo HIGUCHI , Yuji OI , Satoru TODA , Satoru ABE , Junichiro MITSUNO , Hidetoshi MAKINO
IPC分类号： G01N27/419 , G01R19/252 , G01M15/10
摘要： A sensor system (1, 1S) including a current DA converter (42) outputting a control current (Ip) of a sensor element (3S), a control unit (4C) generating a control current instruction value (Ipcmd) corresponding to magnitude of the control current and inputting this instruction value to the current DAC, an instruction value sequence generating unit (47) generating, instead of the control current instruction value, an inspection instruction value sequence (RChcmd) in which predetermined inspection current instruction values (Chcmd) inputted to the current DAC are arranged in order and by which failure of the current DAC can be detected, an inspection current detection unit (71) detecting an inspection current value (Ichv) of an inspection current (Ich) outputted from the current DAC, and a failure detection unit (8) detecting failure of the current DAC from an inspection current value sequence (RIchv) in which the inspection current values are arranged in order of detection.
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公开(公告)号：US20200319234A1
公开(公告)日：2020-10-08
申请号：US16375109
申请日：2019-04-04
发明人： Surya Kiran Musunuri
IPC分类号： G01R19/252 , H03M1/12 , H03L7/099 , G01R19/25
摘要： A arrangement is disclosed for an on-chip system having an increased resolution for supply voltage measurements. The system includes a phase locked loop (PLL), a divider, and a timer. The PLL is configured to generate an oscillator signal. The divider is configured to divide the oscillator signal to generate an divided clock signal. The timer is configured to generate an application start signal and an analog to digital converter (ADC) start signal based on the oscillator signal and a timer delay (Tdelay). The timer delay (Tdelay) is based on the application start signal and the ADC start signal.
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公开(公告)号：US20200241071A1
公开(公告)日：2020-07-30
申请号：US16730047
申请日：2019-12-30
IPC分类号： G01R31/3185 , G01R31/28 , G01R1/067 , G01R19/145 , G01R19/252
摘要： An integrated circuit includes a semiconductor die having conductive pads and an electronic component with a first terminal coupled to a third conductive pad and a second terminal coupled to a fourth conductive pad. A resistor has a first terminal coupled to the fourth conductive pad and a second terminal coupled to the fifth conductive pad, and a first transistor has a first terminal coupled to the first conductive pad, a second terminal coupled to the fifth conductive pad, and a control terminal. A second transistor has a first terminal coupled to the first transistor, a second terminal coupled to the third conductive pad, and a control terminal. A pulse generator has an input coupled to the second conductive pad and an output coupled to the control terminal of the second transistor.
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公开(公告)号：US10574244B2
公开(公告)日：2020-02-25
申请号：US16048633
申请日：2018-07-30
发明人： Johan Vergauwen , Elisa Sacco
摘要： An oscillator-based sensor interface circuit includes an oscillator and a switching means is arranged for switching between at least two signals to be applied to the oscillator via that input. At least one of the signals is an electrical signal representative of an electrical quantity. A counter is arranged to count a number of cycles produced by the oscillator. A control logic is arranged to control the switching means and to derive a control output signal from a first number of counted oscillator cycles. A feedback element is arranged for converting a representation of the control output signal into a feedback signal used directly or indirectly to maintain a given relation between the first number of counted oscillator cycles.
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公开(公告)号：US20190212171A1
公开(公告)日：2019-07-11
申请号：US15864097
申请日：2018-01-08
申请人： Raytheon Company
发明人： John J. Anagnost
IPC分类号： G01D5/20 , G01R19/252
CPC分类号： G01D5/20 , G01D5/2053 , G01R19/252
摘要： An eddy current displacement sensor includes devices or modules for digitizing and interpreting analog signals received from sensor coils. Periodic analog signals, such as sinusoidal or square wave signals, are sent to the coils with a suitable frequency. The output from the coils is then digitized using one or more analog-to-digital converters, at a sampling rate (frequency) that may be greater than that of the frequency of the input signal. The digitized output signals may then be processed to determine displacement of an object relative to the sensor coils, for example using magnitude and/or phase of the digital signals to estimate position. Digitizing the analog output signals directly, rather than only after such signals have been converted to DC signals, allows improvement in processing, as well as enabling flexibility in how the signals are used to estimate position.
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