公开(公告)号：US11927624B2

公开(公告)日：2024-03-12

申请号：US17846397

申请日：2022-06-22

申请人： TEXAS INSTRUMENTS INCORPORATED

发明人： Harsh Patel ,  Aalok Dyuti Saha ,  Sanjeev Praphulla Chandra Nyshadham ,  Subrato Roy ,  Gaurav Kumar Mittal

IPC分类号： G01R31/30 ,  G01R19/25

CPC分类号： G01R31/3008 ,  G01R19/2506

摘要： One example includes a method for measuring a quiescent current in a switching voltage regulator. The method includes generating a mathematical model of a circuit design associated with the switching voltage regulator. The mathematical model includes measurable parameters to describe a switching current of a power switch of the switching voltage regulator. The method also includes fabricating a circuit comprising the switching voltage regulator based on the circuit design. The fabricated circuit includes the power switch and conductive I/O. The method also includes coupling the conductive I/O of the fabricated circuit to a circuit test fixture and providing electrical signals to the conductive I/O via the circuit test fixture. The method also includes measuring the measurable parameters in response to the electrical signals and applying the measurable parameters to the mathematical model to calculate the switching current. The method further includes calculating the quiescent current based on the switching current.

公开(公告)号：US11855641B2

公开(公告)日：2023-12-26

申请号：US17113501

申请日：2020-12-07

申请人： Infineon Technologies LLC

发明人： Oren Shlomo

IPC分类号： G01K7/18 ,  H03K5/1252 ,  H03K5/153 ,  H03K5/19 ,  G11C7/20 ,  H03K17/24 ,  G11C7/02 ,  H03K17/22 ,  G01K7/20 ,  G05F1/648 ,  G01R19/25 ,  G11C7/10 ,  G11C7/14 ,  H03K5/24

CPC分类号： H03K5/1252 ,  G01K7/183 ,  G01K7/20 ,  G01R19/2506 ,  G05F1/648 ,  G11C7/02 ,  G11C7/1039 ,  G11C7/14 ,  G11C7/20 ,  H03K5/153 ,  H03K5/19 ,  H03K5/2472 ,  H03K17/223 ,  H03K17/24

摘要： A resistor network with reduced area and/or improved voltage resolution and methods of designing and operating the same are provided. Generally, the resistor network includes a resistor ladder with a first number (n) of integrated resistors coupled in series between a top and a bottom contact, with one or more contacts coupled between adjacent resistors. A second number of integrated resistors is coupled in parallel between the top and bottom contacts, and a third number of integrated resistors is coupled in series between the second integrated resistors and either the top or the bottom contact. Each of the integrated resistors has a resistance of R, and a voltage developed across each resistor in the resistor ladder is equal to a voltage applied between the top and bottom contacts divided by n. Where the second number is n−1, and the third number is 1, the total number of resistors is 2n.

公开(公告)号：US20230395965A1

公开(公告)日：2023-12-07

申请号：US17805609

申请日：2022-06-06

申请人： Viavi Solutions Inc.

发明人： Scott PETTYGROVE ,  Raleigh Benton STELLE, IV ,  Eduardo ARIES

IPC分类号： H01Q1/12 ,  H01Q3/08 ,  G01R19/25

CPC分类号： H01Q1/1257 ,  H01Q3/08 ,  G01R19/2506

摘要： An antenna alignment device includes an embedded (or is connected to) direct current (DC) voltmeter. In addition to using different sensors for azimuth and tilt alignment of an antenna, the DC voltmeter may be used to measure the DC voltage indicative of received signal strength at the antenna. The received signal may have a transmission pattern generated by a far side antenna. Particularly, the DC voltmeter may be used to detect peaks in the DC voltage and count the number of detected peaks as the antenna is moved changing its azimuth and the tilt. An odd number of peaks indicates the boresight of the antenna is in the main lobe of the transmission pattern, and an even number of peaks indicates otherwise. The highest peak in the odd number of peaks corresponds to the main lobe and the boresight of the antenna is aligned/tuned toward the highest peak.

公开(公告)号：US11693046B2

公开(公告)日：2023-07-04

申请号：US16148342

申请日：2018-10-01

申请人： Tektronix, Inc.

发明人： Yufang Li ,  Sicong Zhu ,  Hua Wei ,  Fan Huang ,  Ye Yang

IPC分类号： G01R31/28 ,  G01R31/11 ,  G01R31/08 ,  G01R13/02 ,  G01R31/58 ,  G01R19/25

CPC分类号： G01R31/2841 ,  G01R13/0218 ,  G01R31/083 ,  G01R31/11 ,  G01R31/58 ,  G01R19/2506

摘要： A test and measurement instrument including a signal generator configured to generate a waveform to be sent over a cable to a device under test (DUT) and a real-time waveform monitor (RTWM) circuit. The RTWM is configured to determine a propagation delay of the cable, capture a first waveform, including an incident waveform and a reflection waveform at a first test point between the signal generator and the DUT, capture a second waveform including at least the incident waveform at a second test point between the signal generator and the DUT, determine a reflection waveform and the incident waveform based on the first waveform and the second waveform, and determine a DUT waveform based on the incident waveform, the reflection waveform, and the propagation delay. The DUT waveform represents the waveform generated by the signal generator as received by the DUT.

公开(公告)号：US20190204365A1

公开(公告)日：2019-07-04

申请号：US15856334

申请日：2017-12-28

申请人： SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC

发明人： Jacques Jean BERTIN ,  Johan Camiel Julia JANSSENS ,  Sam Jan Ben Willem VERMEIR

IPC分类号： G01R17/06 ,  G01R19/25 ,  G01K7/16 ,  G01L1/22

CPC分类号： G01R17/06 ,  G01K7/16 ,  G01L1/2262 ,  G01R19/2506

摘要： A readout circuit for use with a Wheatstone bridge sensor. At least some of the example embodiments are methods including: driving an excitation signal in parallel through a first set of sensor elements of a Wheatstone bridge sensor and refraining from driving the excitation signal through a second set of sensor elements of the Wheatstone bridge sensor; measuring response of the first set of sensor elements, the measuring response of the first set of sensor elements creates a first measurement; and then driving the excitation signal in parallel through the second set of sensor elements of the Wheatstone bridge and refraining from driving the excitation signal through the first set of sensor elements; and measuring response of the second set of sensor elements, the measuring response of the second set of sensor elements creates a second measurement.

公开(公告)号：US20180321290A1

公开(公告)日：2018-11-08

申请号：US15766718

申请日：2016-10-05

申请人： ABB Schweiz AG

发明人： Nilanga Abeywickrama ,  Robert Saers ,  Tord Bengtsson ,  Jonas Hedberg

IPC分类号： G01R23/167 ,  H02H1/00 ,  G01R19/25 ,  G06F17/14

CPC分类号： G01R23/167 ,  G01R19/2506 ,  G01R19/2513 ,  G06F17/142 ,  H02H1/0092

摘要： A method of determining phasor components of a periodic waveform, wherein the method includes: a) sampling the periodic waveform, b) determining a frequency spectrum of the sampled periodic waveform by means of a frequency transform utilizing a Gaussian window function, wherein a ratio np defined by the duration of the sampling of the periodic waveform divided by the width parameter of the Gaussian window function is at least 5, c) selecting a region of the frequency spectrum containing a frequency peak defined by a group of consecutive frequency bins each being defined by a frequency value and a magnitude value, and d) determining phasor components of the periodic waveform based on the group of consecutive frequency bins.

公开(公告)号：US20180252750A1

公开(公告)日：2018-09-06

申请号：US15910896

申请日：2018-03-02

申请人： Analog Devices Global

发明人： Seyed Amir Ali Danesh ,  Jonathan Ephraim David Hurwitz

IPC分类号： G01R19/00 ,  H02H3/32 ,  H02H3/00 ,  H02H1/00 ,  G01R31/02 ,  G01R19/25 ,  G01R23/02 ,  G01R21/06 ,  G01R19/165 ,  G01R35/00

CPC分类号： G01R19/00 ,  G01R19/16547 ,  G01R19/2506 ,  G01R21/06 ,  G01R23/02 ,  G01R31/025 ,  G01R35/005 ,  H02H1/0015 ,  H02H3/006 ,  H02H3/32

摘要： The present invention relates to current measurement apparatus. The current measurement apparatus comprises first and second measurement devices with each of the first and second measurement devices being operative to measure current in a respective one of a live conductor and a neutral conductor substantially simultaneously. The current measurement apparatus is operative to make plural different determinations in dependence on the substantially simultaneous current measurements.

公开(公告)号：US20180139552A1

公开(公告)日：2018-05-17

申请号：US15800406

申请日：2017-11-01

申请人： Silergy Semiconductor Technology (Hangzhou) LTD

发明人： Hejinsheng Cao ,  Xiaotian Su

IPC分类号： H04R29/00 ,  G01B7/16 ,  G01R19/25

CPC分类号： H04R29/001 ,  G01B7/18 ,  G01R19/2506 ,  H04R3/007 ,  H04R3/08

摘要： A loudspeaker diaphragm state estimation method includes: adjusting a weight value of a diaphragm displacement model by adaptive filtering until an error between an estimated value of a driving voltage of a loudspeaker and a measured value of the driving voltage is less than a predetermined threshold; estimating a diaphragm relative displacement of the loudspeaker according to the diaphragm displacement model corresponding to a final determined weight value; determining a diaphragm relative speed at a next moment based on an input current, a product value of a vector determined by an estimated value of a diaphragm relative speed and an estimated value of a diaphragm relative displacement, and a weight value vector obtained at a present moment; and determining an estimated value of the driving voltage using the estimated value of the diaphragm relative speed, the input current, and a DC impedance of the loudspeaker at the present moment.

公开(公告)号：US20180102896A1

公开(公告)日：2018-04-12

申请号：US15727727

申请日：2017-10-09

申请人： Huawei Technologies Co., Ltd.

发明人： Jianzhao Li

IPC分类号： H04L7/00 ,  H03K17/18 ,  H03M1/06 ,  G01R19/25 ,  G01R15/14

CPC分类号： H04L7/0029 ,  G01R15/144 ,  G01R19/2506 ,  H03K17/18 ,  H03K17/78 ,  H03K19/017536 ,  H03M1/0602 ,  H04B10/802 ,  H05B33/0812 ,  H05B37/0254

摘要： A digital signal input circuit including an isolating circuit and a voltage determining circuit is presented, where a first port of an input end of the isolating circuit receives a digital signal, an output end of the isolating circuit outputs the digital signal, and when the isolating circuit is open, the isolating circuit is configured to output a first level, or when the isolating circuit is closed, the isolating circuit is configured to output a second level; and the voltage determining circuit is configured to determine, according to a level of the digital signal, whether the isolating circuit is open or closed. According to the digital signal input circuit, the voltage determining circuit determines a level of a digital signal, thereby correctness of digital signal level conversion is increased.

公开(公告)号：US09910450B2

公开(公告)日：2018-03-06

申请号：US14779162

申请日：2013-04-12

申请人： HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.

发明人： Thomas Sawyers ,  Jon G Lloyd

IPC分类号： G01N27/00 ,  G05F1/46 ,  G06F1/26 ,  G01R19/10 ,  G01R19/25 ,  G06F1/16 ,  G01R27/14

CPC分类号： G05F1/46 ,  G01R19/10 ,  G01R19/2506 ,  G01R27/14 ,  G06F1/1632 ,  G06F1/26 ,  H03M1/0619

摘要： An example provides an apparatus for determining an attribute of an adapter based on a ratio of voltage divider outputs. The apparatus may include a first analog-to-digital converter to provide a first digital signal corresponding to a first output voltage of a first voltage divider connected between a power node and a ground node, the first voltage divider formed, at least in part, when the apparatus is operatively coupled to the adapter. The apparatus may include a second analog-to-digital converter to provide a second digital signal corresponding to a second output voltage of a second voltage divider connected between the power node and the ground node. The attribute of the adapter may be determined based on a ratio of the output voltages.