Waveform Analysis Patents (Class 702/66)
  • Patent number: 10935589
    Abstract: A method for detecting soft faults in a transmission line includes the following steps: acquiring a measurement, called time-domain reflectogram, of a signal characteristic of the reflection of a reference signal previously injected into the line, determining the difference between the time-domain reflectogram and a time-domain reflectogram measured previously for the same line or an identical line of similar characteristics, in order to obtain a corrected time-domain reflectogram, applying a plurality of independent transformations to the corrected time-domain reflectogram in order to obtain a plurality of independent transformed reflectograms, converting the transformed reflectograms into a plurality of mutually independent probabilities of occurrence of a fault, applying a data merging method to the probabilities of occurrence of a fault to deduce therefrom a unified value of the probability of occurrence of a fault.
    Type: Grant
    Filed: March 28, 2017
    Date of Patent: March 2, 2021
    Assignee: COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES
    Inventors: Wafa Ben Hassen, Julien Mottin, Antoine Dupret, Miguel Gallego Roman, Suzanne Lesecq, Diego Puschini Pascual, Nicolas Ravot, Armando Zanchetta
  • Patent number: 10921249
    Abstract: According to the present invention, an optical differential interrogation method for surface plasmon resonance imaging including: letting first incident light of a first wavelength and second incident light of a second wavelength to be incident on a sample while varying an incident angle; detecting intensity of first reflection light of the first incident light and intensity of second reflection light of the second incident light; and identifying the sample by using a difference between the intensity of the first reflection light and the intensity of the second reflection light, can be provided, and thus it is possible to obtain much better angular resolution while using a detector or a camera, which has a relative low receiving sensitivity and a sensor chip where samples having various characteristics are two-dimensionally arrayed and integrated can be effectively measured.
    Type: Grant
    Filed: July 9, 2019
    Date of Patent: February 16, 2021
    Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Jong Deog Kim, Yo Han Choi
  • Patent number: 10880959
    Abstract: Disclosed are methods and apparatuses for heating an object in a cavity by feeding the cavity with RF signals. One of the disclosed methods includes simultaneously feeding the cavity with at least two RF signals. Of the at least two RF signals, a first RF signal is fed to the cavity via a first antenna and a second RF signal is fed to the cavity via a second antenna. The first and second RF signals have a common frequency and differ in phase by a first phase difference. The method also includes measuring the first phase difference and adjusting the feeding based on measurements of reflected RF signals reflected from the cavity. Conducting the measurements of the reflected RF signals may also be part of the disclosed method. A disclosed apparatus includes the structure required for carrying out the above method.
    Type: Grant
    Filed: April 14, 2016
    Date of Patent: December 29, 2020
    Assignee: GOJI LIMITED
    Inventors: Iddo Nachtom, Lior Darshan
  • Patent number: 10823762
    Abstract: The present invention provides a method and apparatus for automatically adjusting the hold-off time of a DSO based on real-time cycle measurements of the system trigger signal: obtaining a cycle sequence by measuring the system trigger signal, the maximum cycle and minimum cycle, then judging the difference of the maximum cycle and minimum cycle: if the difference is greater than a threshold set by user, setting the hold-off time to the maximum cycle, the minimum cycle or the median cycle, then returning; otherwise terminating the adjustment of the hold-off time. At this point, the hold-off time is correctly set. Therefore, the present invention reduces the complexity and time consumption of the hold-off adjustment, and allows the test signal to be quickly and stably displayed on screen of DSO, meanwhile, which makes the trigger adjustment of DSO more convenient.
    Type: Grant
    Filed: June 12, 2018
    Date of Patent: November 3, 2020
    Assignee: UNIVERSITY OF ELECTRONIC SCIENCE AND TECHNOLOGY OF CHINA
    Inventors: Qinchuan Zhang, Feng Tan, Huiqing Pan, Hao Zeng, Luonan Zheng
  • Patent number: 10771348
    Abstract: A method for inferring component parameter values for components in a network is disclosed. The components comprise at least one of network nodes or network links and the method comprises identifying a plurality of paths through the network (100), measuring values of a path parameter for identified paths (410), generating a set of constraints by expressing individual measured path parameter values as a function of component parameter values of the components in the path associated with the measured path parameter value (420a), and generating an estimate of the component parameter values by solving an optimisation problem defined by the generated constraints (420b).
    Type: Grant
    Filed: November 19, 2014
    Date of Patent: September 8, 2020
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Marzio Puleri, Teresa Pepe
  • Patent number: 10740683
    Abstract: Technical solutions are described for visually depicting health of a cognitive system. An example computer-implemented method includes accessing a query-log of a question input to the cognitive system. The method also includes generating a query-node corresponding to the question. The method also includes configuring animation parameters of the query-node based on the query-log. The method also includes displaying the query-node according to the animation parameters.
    Type: Grant
    Filed: July 29, 2016
    Date of Patent: August 11, 2020
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: John J. Andersen, Jason E. Doucette, Sanjay F. Kottaram, Robert L. Turknett, Jr., Wilson L. Wu
  • Patent number: 10732007
    Abstract: A magnetic speed sensor may comprise a digital component configured to estimate a zero crossing event based on a plurality of sensor signal samples. The digital component may output, to a control unit, a speed signal that is based on the estimated zero crossing event.
    Type: Grant
    Filed: March 11, 2019
    Date of Patent: August 4, 2020
    Assignee: Infineon Technologies AG
    Inventors: Dirk Hammerschmidt, Muhammad Adnan
  • Patent number: 10718845
    Abstract: The method according to the invention enables the diagnosis (15, 16) of phase current sensor defects in a system for controlling a synchronous rotary electrical machine of a motor vehicle. According to the invention, the method takes into account the differences (îd, lq) between measurements provided (14) by the sensors, and nominal values of the phase currents (ia, ib, ic) in order to diagnose defects. The differences are calculated (18) in a rotating Park reference frame (17) and are separate from an electromechanical model of the machine. The method detects sensor defects if the differences are substantially non-zero (19) and an offset sensor defect if a residual pulsation (? res) of the differences is substantially equal to a measured speed (w) of the control system.
    Type: Grant
    Filed: September 10, 2015
    Date of Patent: July 21, 2020
    Assignee: Valeo Equipments Electriques Moteur
    Inventors: Sidath Diao, Zaatar Makni, Demba Diallo
  • Patent number: 10697804
    Abstract: A vibration sensing optical fiber cable is provided. The cable includes at least one optical fiber embedded in the cable jacket such that vibrations from the environment are transmitted into the cable jacket to the optical fiber. The cable is configured in a variety of ways, including through spatial arrangement of the sensing fibers, through acoustic impedance matched materials, through internal vibration reflecting structures, and/or through acoustic lens features to enhance sensitivity of the cable for vibration detection/monitoring.
    Type: Grant
    Filed: May 25, 2018
    Date of Patent: June 30, 2020
    Assignee: Corning Research & Development Corporation
    Inventors: Riley Saunders Freeland, Michael John Gimblet, Jason Clay Lail, James Arthur Register, III, David Alan Seddon
  • Patent number: 10692691
    Abstract: The invention relates to a method for analyzing an analogue signal comprising randomly spaced events having an event height. The method includes irradiating a sample with a focused beam of energetic electrons, detecting emission from the sample in response to such irradiation, and converting an analog signal of the emissions to a stationary time signal. The method further includes determining an estimated noise contribution for the stationary time signal, and determining an estimated event height of an event based on the stationary time signal and the estimated noise contribution for the stationary time signal, and determining, based on the estimated event height, an energy of the emission detected by the detector. This method is particularly useful for X-ray detectors, such as Silicon Drift Detectors, used in a SEM. By estimating the noise contribution to the signal, the step height is estimated with improved accuracy.
    Type: Grant
    Filed: July 25, 2019
    Date of Patent: June 23, 2020
    Assignee: FEI Company
    Inventors: Nikolaos Kontaras, Bart Jozef Janssen, Cornelis Sander Kooijman, Duarte Guerreiro Tome Antunes
  • Patent number: 10656183
    Abstract: A test and measurement instrument, such as an oscilloscope, including one or more ports to receive one or more signals from a device under test, a trigger enable logic circuit configured to output a trigger enabled signal when a trigger enable event occurs within the one or more signals, the trigger enable event being a real-time event of the one or more signals, one or more trigger logic circuits configured to generate a plurality of trigger signals when the trigger enable signal is received, each trigger signal being generated when a trigger event occurs within one of the one or more signals, and an acquisition circuit configured to acquire and store data in a memory in response to each of the trigger signals.
    Type: Grant
    Filed: October 27, 2017
    Date of Patent: May 19, 2020
    Assignee: Tektronix, Inc.
    Inventors: David L. Kelly, Jed H. Andrews, Patrick A. Smith, Michael A. Martin
  • Patent number: 10530619
    Abstract: An integrated receiver supports adaptive receive equalization. An incoming bit stream is sampled using edge and data clock signals derived from a reference clock signal. A phase detector determines whether the edge and data clock signals are in phase with the incoming data, while some clock recovery circuitry adjusts the edge and data clock signals as required to match their phases to the incoming data. The receiver employs the edge and data samples used to recover the edge and data clock signals to note the locations of zero crossings for one or more selected data patterns. The pattern or patterns may be selected from among those apt to produce the greatest timing error. Equalization settings may then be adjusted to align the zero crossings of the selected data patterns with the recovered edge clock signal.
    Type: Grant
    Filed: January 25, 2019
    Date of Patent: January 7, 2020
    Assignee: Rambus Inc.
    Inventor: Robert E. Palmer
  • Patent number: 10458863
    Abstract: Virtual sensors can be used to monitor the loads on the system in determining damage accumulation, remaining useful life or retirement time of the components. A virtual sensor is a mathematical construct to infer a desired system measurement (e.g. a structural load) from readily available system state parameters (e.g. speed, weight, load factors, control settings, etc.). The accuracy of the virtual sensor depends upon the mapping between the desired measurement and the state parameters. A hybrid load monitoring system and method includes one or more direct or physical sensor measurements in addition to the plurality of virtual sensors. Signals from the physical sensors are included as an input (as opposed to an output) to the mapping between system state parameters and the various target sensor feature amplitudes.
    Type: Grant
    Filed: April 12, 2013
    Date of Patent: October 29, 2019
    Assignee: SIKORSKY AIRCRAFT CORPORATION
    Inventors: Andreas P. F. Bernhard, James Peter Cycon, Alexander I. Khibnik, Mark W. Davis
  • Patent number: 10317334
    Abstract: The present invention relates to an optical element rotation type ellipsometer, and more particularly, to an ellipsometer used to measure Mueller-matrix components of a sample by measuring and analyzing a change in a polarization state of light reflected or transmitted by the sample. According to the exemplary embodiment of the present invention, it is possible to provide the achromatic rotating-element ellipsometer and the method for measuring Mueller-matrix elements of a sample using the same capable of measuring the Mueller-matrix elements of the anisotropic sample as well as the isotropic sample by using four polarizers.
    Type: Grant
    Filed: March 8, 2016
    Date of Patent: June 11, 2019
    Assignee: Korea Research Institute of Standards and Science
    Inventors: Yong Jai Cho, Won Chegal, Hyun Mo Cho
  • Patent number: 10270720
    Abstract: Recommendations, such as recipients and attachments, are determined from content that is associated with a message item. A user may enter one or more: recipients; attachments; and message content for the message that may be used in determining recommendations. Keywords may also be identified by analyzing the content of the message to determine recommended content/recipients. Behavior patterns may also be used to determine recommendations. The recommended users/content of a message may be obtained from a messaging program, a local data store, a network data store, a cloud service, and the like. The recommended items (e.g. users/content) determined from analyzing the content are displayed such that they may be used by the user when editing the message item. The recommended items may be ranked by relevancy using metrics such as keywords, people, time last viewed and use patterns.
    Type: Grant
    Filed: December 20, 2012
    Date of Patent: April 23, 2019
    Assignee: MICROSOFT TECHNOLOGY LICENSING, LLC
    Inventors: Hui Wang, Jeffrey Kalvass, Yanling Wang, Diana Jaffe, Misty Pickford
  • Patent number: 10235339
    Abstract: A measurement instrument receives an analog input signal from a measurement target, converts the input signal into a digital signal, scans the digital signal and comparing the scanned digital signal with a pattern signature using a flexible matching procedure implemented by hardware, and triggers the measurement instrument according to a result of the flexible matching procedure.
    Type: Grant
    Filed: February 19, 2013
    Date of Patent: March 19, 2019
    Assignee: Keysight Technologies, Inc.
    Inventors: Andrew Robert Lehane, Antony Kirkham, Martin Ware Curran-Gray
  • Patent number: 10184971
    Abstract: Disclosed is a method for diagnosis by reflectometry of a bundle of power lines including an input point and a plurality of branches, including the following steps: inserting (S50) electric markers having different frequency characteristics onto the branches of the bundle; injecting (S52) a test signal into the bundle from the input point; receiving (S54) a set of reflected signals produced by reflections of the test signal in the branches; analyzing all the reflected signals by identifying the markers and by assigning (S56) each reflected signal to one of the branches according to the frequency characteristic of the marker inserted onto the branch; and identifying the presence/absence of a defect in the branch by comparing (S58) the reflected signal assigned to the branch with a reflected signal model obtained by modelling the reflection of the test signal in the branch in the absence of any defect in the branch.
    Type: Grant
    Filed: June 19, 2015
    Date of Patent: January 22, 2019
    Assignees: CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE—CNRS, CENTRALESUPELEC, INRIA—INSTITUT NATIONAL DE LA RECHERCHE EN INFORMATIQUE ET EN AUTOMATIQUE
    Inventors: Florent Loete, Michel Sorine
  • Patent number: 10145785
    Abstract: Provided is an optical element rotation type Mueller-matrix ellipsometer for solving a problem of measurement accuracy and measurement precision occurring due to residual polarization of a light source, polarization dependence of a photo-detector, measurement values of Fourier coefficients of a high order term in dual optical element rotation type Mueller-matrix ellipsometers according to the related art capable of measuring some or all of components of a Mueller-matrix for any sample.
    Type: Grant
    Filed: May 13, 2014
    Date of Patent: December 4, 2018
    Assignee: Korea Research Institute of Standards and Science
    Inventors: Yong Jai Cho, Won Chegal, Hyun Mo Cho
  • Patent number: 10025365
    Abstract: Examples described herein include receiving current values of a power device, determining a spike situation of the power device, determining a power course for the power device, and operating the power device according to the power course. The current values may include a first current value at a first time and a second current value at a second time. The power course may be determined based on a plurality of current change values associated with the spike situation, a total number of spikes associated with the spike situation, and a duration of at least one spike out of the total number of spikes associated with the spike situation.
    Type: Grant
    Filed: June 23, 2016
    Date of Patent: July 17, 2018
    Assignee: HEWLETT PACKARD ENTERPRISE DEVELOPMENT LP
    Inventors: Abhishek Banerjee, James W. Hollas
  • Patent number: 10009796
    Abstract: A bandwidth adjustment method includes: determining a bandwidth update value of a channel of a first network system and a bandwidth update value of a channel of a second network system and a bandwidth update value of a protective bandwidth according to a request of a user or a channel condition, so that updated bandwidths of the channels of the first network system and the second network system meet the request of the user or are adapted to requirements of channel conditions. By using the technical schemes, a network resource can be adjusted between multiple network systems when the multiple network systems share one network resource, thereby helping improve the application efficiency of a bandwidth resource and ensuring anti-interference capabilities of the network systems.
    Type: Grant
    Filed: November 12, 2015
    Date of Patent: June 26, 2018
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Xun Yang, Tianyu Wu
  • Patent number: 9998274
    Abstract: An optical channel between a coherent optical transmitter and a coherent optical receiver may include one or more components that act as a bandpass filter with a passband that is narrower than the signal bandwidth. Such a narrow filter may significantly attenuate the signal content close to the band edge of the data signal. As a result, timing error detection may work less effectively, and therefore clock recovery may be less effective or fail. Methods and systems are disclosed in which a single optical carrier is used to transmit a data signal that has multiple bands, and timing error detection is performed at the receiver using one or more inner bands of the multiple bands. The timing error detection may therefore be made more robust to the effects of the narrow filtering.
    Type: Grant
    Filed: November 16, 2016
    Date of Patent: June 12, 2018
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Mahdi Zamani, Mehdi Torbatian, Jeebak Mitra, Zhuhong Zhang, Chuandong Li
  • Patent number: 9983604
    Abstract: A low drop-out (LDO) regulator includes a pass transistor, a feedback circuit, an error amplifier, and a compensation unit. The pass transistor is configured to regulate a power supply and output an output voltage according to a control signal. The feedback circuit is configured to generate a feedback voltage based on the output voltage. The error amplifier is configured to output a comparison signal in response to a reference voltage and the feedback voltage. The compensation circuit is configured to generate a negative capacitance in association with a first node connected to a gate electrode of the pass transistor.
    Type: Grant
    Filed: October 5, 2015
    Date of Patent: May 29, 2018
    Assignees: Samsung Electronics Co., Ltd., Korea University Research and Business Foundation
    Inventors: JaeYoul Lee, Jeongpyo Kim, Yong Sin Kim, Seong Jin Yun
  • Patent number: 9891248
    Abstract: The present disclosure provides an acquisition system for oscilloscopes having n input channels. The acquisition system comprises n A/D converters (2.1, 2.2, . . . , 2.n) with each of the n A/D converters receiving a signal under test from one of n channels and digitizing the received signal into digital samples; an acquisition memory for storing the digitized samples from the n A/D converters; and a memory allocation processor for dynamically allocating memory lengths (or memory depths) for the selected n input channels within an acquisition memory based on the user setting from the oscilloscope. To efficiently use the acquisition memory, the acquisition system does not allocate any memory areas for the input channels that are not selected. In addition, the acquisition system can set up sampling rates for the n input channels based on the frequencies of the signals under test received from the n input channels.
    Type: Grant
    Filed: August 30, 2012
    Date of Patent: February 13, 2018
    Assignee: Tektronix, Inc.
    Inventor: Haiwen Yu
  • Patent number: 9893879
    Abstract: A system and method of multi-symbol communications from a transmitter to a receiver via a channel, including transmitting signals as a waveform representing a sequence of symbols, each symbol of unit-interval duration and each symbol associated with its own signal level. This method includes graphically representing the waveform as an eye diagram having a horizontal time axis and a vertical signal level axis arranged to form one or more eyes, and using a sampling point in each eye to determine which signal the waveform in any unit interval represents. Each sampling point has a phase and a decision threshold. The method further includes identifying the eyes in the eye diagram, finding a convex polygonal region fitting within each eye, finding a largest rectangle fitting the convex polygonal region of each eye, and positioning the sampling point in each eye at a center of the rectangle of that eye.
    Type: Grant
    Filed: August 16, 2016
    Date of Patent: February 13, 2018
    Assignee: Tektronix, Inc.
    Inventor: Richard J. Poulo
  • Patent number: 9863864
    Abstract: Disclosed is a threshold selector that selects a threshold by generating a histogram from a detector signal and a flow cytometer. The detector signal includes both data and noise. A histogram is generated, which includes height data from the pulses of the detector signal as well as noise. The flow cytometer can be operated without samples to generate a histogram that includes only noise. The threshold signal can then be selected by selecting an intensity level on the histogram that is between the noise and data.
    Type: Grant
    Filed: September 13, 2016
    Date of Patent: January 9, 2018
    Assignee: Bio-Rad Technologies, Inc.
    Inventor: Daniel Nelson Fox
  • Patent number: 9832009
    Abstract: A receiver serial data streams generates a local timing reference clock from an approximate frequency reference clock by phase-aligning the local clock to transitions in the data stream. This process is commonly known as clock and data recovery (CDR). Certain transitions of the data signals are selected for use in phase-aligning the local clock, and certain transitions are ignored. Phase-error signals from multiple receivers receiving the multiple serial data streams are combined and used to make common phase adjustments to the frequency reference clock. These common adjustments track jitter that is common to the received data streams. Local adjustments that better align each respective local clock to the transitions of its respective serial data stream are made using a local phase-error signal. These local adjustments track jitter that is more unique to each of the respective serial data streams.
    Type: Grant
    Filed: July 18, 2016
    Date of Patent: November 28, 2017
    Assignee: Rambus Inc.
    Inventors: Masum Hossain, Nhat Nguyen, Yikui Jen Dong, Arash Zargaran-Yazd
  • Patent number: 9755819
    Abstract: A receiver with clock phase calibration. A first sampling circuit generates first digital data based on an input signal, a sampling phase of the first sampling circuit controlled by a first clock signal. A second sampling circuit generates second digital data based on the input signal, a sampling phase of the second sampling circuit controlled by a second clock signal. Circuitry within the receiver calibrates the clocks in different stages. During a first calibration stage, a phase of the second clock signal is adjusted while the first digital data is selected for generating the output data. During a second calibration stage, a phase of the first clock signal is adjusted while the first digital data is selected for the output data path.
    Type: Grant
    Filed: June 8, 2016
    Date of Patent: September 5, 2017
    Assignee: Rambus Inc.
    Inventors: Marko Aleksić, Simon Li, Roxanne Vu
  • Patent number: 9742550
    Abstract: Systems and methods for high speed communications are described herein. In certain aspects, the systems and methods include innovative transceiver architectures and techniques for re-timing, multiplexing, de-multiplexing and transmitting data. The systems and methods can be used to achieve reliable high-speed point-to-point communication between different electronic devices, computing devices, storage devices and peripheral devices.
    Type: Grant
    Filed: June 3, 2016
    Date of Patent: August 22, 2017
    Assignee: INPHI CORPORATION
    Inventors: Marcel Louis Lugthart, Jeffrey Zachan, Linghsiao Jerry Wang
  • Patent number: 9689660
    Abstract: An object of this invention is to sense a transient displacement of the blade position to thereby detect abnormalities early. The invention includes: one or more first sensors mounted so as to be removable from an outer surface of a casing opposed to blade tips; a second sensor for acquiring a signal from a fixed point on a rotor shaft of the blades; a section configured to extract data groups from an output signal of the first sensor on the basis of information acquired by the second sensor; a section configured to average the data groups; a section configured to determine thresholds from averaged data obtained under a healthy condition; and an assessing section configured to compare magnitude of the thresholds and sensor signals obtained during blade status monitoring. Since a transient displacement of blade position can be sensed, abnormalities can be detected early in this invention. This early detection, in turn, enables a rotation to be stopped during an initial phase of blade damage.
    Type: Grant
    Filed: June 26, 2014
    Date of Patent: June 27, 2017
    Assignee: Mitsubishi Hitachi Power Systems, Ltd.
    Inventors: Akira Nishimizu, Toshiyuki Hiraoka, Masahiro Tooma, Soushi Narishige, Tetsuya Matsui
  • Patent number: 9638522
    Abstract: A total station including an electro-optical distance measuring unit and a scanning functionality is disclosed. The total station may include an analysis unit for analysis of the registered measuring signal data and conversion thereof into scanning points for a point cloud, whereby a point cloud having the scanning points can be generated. The distance measuring unit may be configured in such a manner that the distance measurement can be carried out by means of runtime measurement and/or waveform digitizing (WFD). In addition, the total station may have a program storage unit which may provide at least two scanning modes, wherein the at least two scanning modes differ at least in a measuring rate such as, for example, in the number of scanning points per unit of time.
    Type: Grant
    Filed: April 4, 2014
    Date of Patent: May 2, 2017
    Assignee: LEICA GEOSYSTEMS AG
    Inventors: Hans-Martin Zogg, Patrik Lengweiler, Robert Natau, Reto Stutz
  • Patent number: 9568889
    Abstract: A time to digital converter (TDC) with high resolution is provided. The TDC includes a counter, a reference value generator and a comparator. The counter samples an input signal according to a clock signal to calculate a pulse width of the input signal. The reference value generator samples a ruler signal according to the clock signal to generate a reference value. Herein, a frequency of the clock signal is greater than a frequency of the ruler signal, and the frequency of the ruler signal is greater than a frequency of the input signal. The comparator is coupled to the counter and the reference value generator, and compares the pulse width of the input signal and the reference value to generate a count result.
    Type: Grant
    Filed: June 15, 2016
    Date of Patent: February 14, 2017
    Assignee: Winbond Electronics Corp.
    Inventor: Chen-Yi Lee
  • Patent number: 9515856
    Abstract: A decision feedback equalizer is calibrated to compensate for estimated inter-symbol interference in a received signal and offsets of sampling devices. The decision feedback equalizer is configured so that an output signal of a sampling circuit represents a comparison between an input signal and a reference of the sampling circuit under calibration. An input signal is received over a communication channel that includes a predetermined pattern. The predetermined pattern is compared to the output signal to determine an adjusted reference for configuring the sampling circuit that accounts for both offset and inter-symbol interference effects.
    Type: Grant
    Filed: May 22, 2015
    Date of Patent: December 6, 2016
    Assignee: Rambus Inc.
    Inventors: Kambiz Kaviani, Amir Amirkhany, Jason Chia-Jen Wei, Aliazam Abbasfar
  • Patent number: 9496993
    Abstract: A method and apparatus for generating a probability density function eye are provided. The method preferably includes the steps of acquiring an input waveform, performing a clock data recovery in accordance with the input waveform to determine one or more expected transition times and defining a plurality of unit intervals of the input waveform in accordance with the one or more expected transition times. One or more values of one or more data points may then be determined in accordance with the input waveform in accordance with the one or more expected transition times, and a category for each unit interval in accordance with its state and its position within the input waveform may also be determined. One or more histograms may then be generated for the determined one or more values for each category of unit intervals.
    Type: Grant
    Filed: January 11, 2013
    Date of Patent: November 15, 2016
    Assignee: Teledyne LeCroy, Inc.
    Inventor: Martin T. Miller
  • Patent number: 9423425
    Abstract: A side channel analysis apparatus based on a profile includes a waveform collection unit configured to collect leaked information from a target device of a side channel analysis; and a preprocessing unit configured to preprocess a waveform data correspond to the leaked information collected from the waveform collection unit before analyzing same. Further, the side channel analysis apparatus includes an analysis unit configured to analyze the waveform data preprocessed in the preprocessing unit; and a profile configuration unit configured to make each process of the waveform collection unit, the preprocessing unit, and the analysis unit into a process and configure a profile for managing each process by connection of each process.
    Type: Grant
    Filed: January 4, 2013
    Date of Patent: August 23, 2016
    Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Ju Han Kim, Kyunghee Oh, Doo Ho Choi, Taesung Kim, Yong-Je Choi, Seung Kwang Lee
  • Patent number: 9374852
    Abstract: A method of heating and/or thawing using an RF heater is described. In some cases the heating differentially heats portions according to their dissipation ratios. Optionally, this avoids dissipating large amounts of energy into thawed portions while frozen portions are still extant and heat slowly. Optionally, this prevents overheating of thawed potions.
    Type: Grant
    Filed: June 21, 2013
    Date of Patent: June 21, 2016
    Assignee: GOJI LIMITED
    Inventors: Alexander Bilchinsky, Eran Ben-Shmuel, Daniella Atzmony
  • Patent number: 9350573
    Abstract: An apparatus, method and system for reducing discontinuities between waveforms in a communication system. In one embodiment, an apparatus includes a processor and memory including computer program code. The memory and the computer program code are configured, with the processor, to determine an amplitude and set of derivatives at an end point of a first symbol waveform, and determine an amplitude and set of derivatives at a beginning point of a second symbol waveform. The memory and the computer program code are configured, with the processor, to insert a guard period waveform having an amplitude and set of derivatives at a first end to substantially match the amplitude and set of derivatives at the end point of the first symbol waveform and an amplitude and set of derivatives at a second end that substantially matches the amplitude and set of derivatives at the beginning point of the second symbol waveform.
    Type: Grant
    Filed: December 23, 2010
    Date of Patent: May 24, 2016
    Assignee: NOKIA TECHNOLOGIES OY
    Inventors: Markus Nentwig, Risto Wichman
  • Patent number: 9335153
    Abstract: The present application discloses detecting an asperity on a storage media surface using two amplitude threshold crossings of an asperity detection signal within a preset timing window. The present application further discloses a temperature-dependent resistive asperity sensor and a preamplifier that correlates a resistance change at the asperity sensor within a preset timing window to detect an asperity on a storage media surface. The asperity may be one or both of a void in the storage media surface and a protrusion from the storage media surface.
    Type: Grant
    Filed: September 26, 2012
    Date of Patent: May 10, 2016
    Assignee: SEAGATE TECHNOLOGY LLC
    Inventors: Robert Matousek, Kevin David Powers, Dale Thomas Riley
  • Patent number: 9325342
    Abstract: A method for improving bandwidth of an oscilloscope involves, in preferred embodiments, the use of frequency up-conversion and down-conversion techniques. In an illustrative embodiment the technique involves separating an input signal into a high frequency content and a low frequency content, down-converting the high frequency content in the analog domain so that it may be processed by the oscilloscope's analog front end, digitizing the low frequency content and the down-converted high frequency content, and forming a digital representation of the received analog signal from the digitized low frequency content and high frequency content.
    Type: Grant
    Filed: October 4, 2013
    Date of Patent: April 26, 2016
    Assignee: Teledyne LeCroy, Inc.
    Inventors: Peter J Pupalaikis, David C Graef
  • Patent number: 9252988
    Abstract: A method for modifying the performance of an adaptive equalizer in a receiver is provided. A carrier wave including a first polarization state and a second polarization state, wherein there is a correlation between the first polarization state and the second polarization state, is received. The first polarization state and the second polarization state are demultiplexed to generate two respective constellations. A first expected value based on the first constellation, and a second expected value based on the second constellation, are calculated. An adaptive equalizer receives a first and second signals associated with the respective polarization states. The adaptive equalizer generates outputs based on the signals. These outputs are used to generate error values. Feedback is input into the adaptive equalizer, wherein the feedback is based on the error values.
    Type: Grant
    Filed: November 30, 2011
    Date of Patent: February 2, 2016
    Assignee: AT&T Intellectual Property I, LP
    Inventors: Xiang Zhou, Lynn Nelson
  • Patent number: 9239760
    Abstract: In one aspect, a computer system for managing occurrences of data anomalies in a data stream is provided. The computer system includes a processor in communication with the data stream. The processor is programmed to receive a first data stream from a phasor measurement unit. The processor is also programmed to calculate at least one singular value associated with the first data stream. The processor is further programmed to detect a first data anomaly within the first data stream using the at least one singular value. The first data anomaly occurs during a first time segment. The processor is also programmed to indicate the first time segment as containing the first data anomaly.
    Type: Grant
    Filed: October 24, 2013
    Date of Patent: January 19, 2016
    Assignee: General Electric Company
    Inventors: Chaitanya Ashok Baone, Nilanjan Ray Chaudhuri
  • Patent number: 9143141
    Abstract: A method for measuring characteristics of a power line signal having a fundamental frequency is provided. The method includes estimating the fundamental frequency of the power line signal, and generating a sampling clock that is substantially synchronized to the estimated fundamental power line frequency. The power line signal is sampled with the substantially synchronized sampling clock to generate data samples that include one or more substantially complete cycles of the power line signal. The data samples are processed to detect zero crossings of the power line signal, and the detected zero crossings are used to calculate an r.m.s. voltage of the power line signal measured over one full cycle, commencing at a zero crossing, and refreshed each half-cycle. Other aspects are also provided.
    Type: Grant
    Filed: October 4, 2010
    Date of Patent: September 22, 2015
    Assignee: Siemens Industry, Inc.
    Inventors: Chun Fan, Paul Terricciano
  • Patent number: 9117041
    Abstract: A magnetic property analyzing apparatus includes a first computing unit to perform a magnetic field analysis utilizing a FEM using an average magnetization given with respect to each of elements to which an analyzing target is segmented, and a second computing unit that computes an effective magnetic field acting on each element using a magnetic field computed by the magnetic field analysis, computes magnetization vectors within each element by obtaining a time integral of a LLG equation using the effective magnetic field, and computes an average magnetization for each element by averaging the magnetization vectors.
    Type: Grant
    Filed: October 10, 2012
    Date of Patent: August 25, 2015
    Assignee: FUJITSU LIMITED
    Inventor: Koichi Shimizu
  • Patent number: 9104912
    Abstract: The present invention provides an apparatus and a method for transforming a time waveform of an electromagnetic wave into a time waveform suited for signal processing and the like so as to measure the time waveform. A wavelet transform is performed on a first time waveform of an electromagnetic wave, such as a terahertz wave, measured in advance, and a second time waveform suited for signal processing and having a high correlation with a mother wavelet used in the wavelet transform is formed by controlling a wavelet expansion coefficient. In a second measurement process and onward of a target object, a transforming unit, such as a bias voltage controller, is used to transform the electromagnetic wave into a transformed time waveform so as to measure the time waveform.
    Type: Grant
    Filed: December 28, 2010
    Date of Patent: August 11, 2015
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Michinori Shioda, Toshihiko Ouchi
  • Publication number: 20150134284
    Abstract: The invention relates to a method for determining the angular offset between the rotor and the stator of an electrical machine for driving a motor vehicle, the rotor being supplied with a rotor-energizing current and voltage, the stator being supplied over three phases with stator-phase currents and voltages, wherein the method includes the following steps: verifying that the electrical machine is stopped; applying a rotor-energizing signal for an amount of time capable of causing the partial magnetization of the rotor; applying a rotor-de-energizing signal capable of causing an active and rapid demagnetization of the rotor, while measuring, during the magnetization, the stator-phase currents and maintaining zero voltage among the phases of the stator; determining the direct stator currents and quadrature stator currents corresponding to the stator-phase currents measured by applying Park and Clarke transforms and in accordance with a measurement of the electrical position of the rotor; determining the maximu
    Type: Application
    Filed: April 19, 2013
    Publication date: May 14, 2015
    Applicant: RENAULT s.a.s.
    Inventor: Edouard Negre
  • Patent number: 9026390
    Abstract: A time-interleaved RF triggering method and system on a test and measurement instrument includes an acquisition component that samples a waveform, which is converted into an amplitude, phase, frequency, in-phase (I), and quadrature (Q) waveform, any of which can be used for triggering an RF digital trigger, including triggering that uses demodulation and/or decoding of the down-converted complex IQ data samples for a given protocol. Aliasing caused by subsampled data in each of the interleaved acquisition components is cancelled out using a fractional time-shift filter.
    Type: Grant
    Filed: September 6, 2011
    Date of Patent: May 5, 2015
    Assignee: Tektronix, Inc.
    Inventor: Gregory A. Martin
  • Patent number: 9008983
    Abstract: Provided are a waveguide capable of suppressing strain and defect caused in a semiconductor in an initial stage or during operation due to a manufacturing process or the like to realize improvement and stabilization of characteristics such as oscillation characteristics, and a method of manufacturing the waveguide. A waveguide includes a first conductor layer and a second conductor layer that are composed of a negative dielectric constant medium having a negative real part of dielectric constant with respect to an electromagnetic wave in a waveguide mode, and a core layer that is in contact with and placed between the first conductor layer and the second conductor layer, and includes a semiconductor portion. At least the first conductor layer has a particular depressed and projected structure extending in an in-plane direction.
    Type: Grant
    Filed: April 26, 2012
    Date of Patent: April 14, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventor: Yasushi Koyama
  • Patent number: 9002668
    Abstract: A method, system, and computer usable program product for discovering an equipment power connection relationship between an equipment and an electrical power outlet. A workload executing on the equipment is monitored for a period resulting in monitoring data. The Metering data associated with a first power outlet in a plurality of power outlets is searched, the metering data representing electrical power drawn from a power outlet over the period. A determination is made whether the monitoring data matches with the metering data associated with the first power outlet. If a match is determined, a relationship is identified between the equipment and the first power outlet, whereby the first power outlet is known to supply electrical power to the equipment.
    Type: Grant
    Filed: April 28, 2010
    Date of Patent: April 7, 2015
    Assignee: International Business Machines Corporation
    Inventors: Jeffery John Van Heuklon, Douglas Andrew Wood
  • Publication number: 20150094975
    Abstract: Wavelet transform systems and methods for voltage events detection and classification are provided and include a wavelet multiresolution analysis-based real time detection and classification for voltage events, as developed on a LabVIEW® platform. In the wavelet transform systems and methods for voltage events detection and classification, a finest detail level is utilized to detect the start time, the end time, and the duration of the voltage events, whereas a coarsest approximation level is used to classify the voltage event types. The wavelet transform systems and methods for voltage events detection and classification are applied on several typical short duration voltage events, such as sag, swell, and interruption.
    Type: Application
    Filed: October 1, 2013
    Publication date: April 2, 2015
    Applicant: KING FAHD UNIVERSITY OF PETROLEUM AND MINERALS
    Inventors: FOUAD RASHED FOUAD ZARO, MOHAMMAD ALI ABIDO, MOHAMED A. EL-GEBEILY
  • Publication number: 20150088445
    Abstract: A method of characterizing an envelope tracking amplification stage, the method comprising: generating an input test waveform which is representative of an input waveform under normal operating conditions of the amplification stage; applying a respective one of a plurality of different shaping functions, each comprising a non-linear transfer function, to the input signal envelope in each of a plurality of test periods during the period in which the input test waveform is applied as the input signal to generate the input to the envelope tracking modulated supply voltage; measuring parameters of the amplification stage during the period in which the input test waveform is applied in order to allow determination of the gain, phase and efficiency characteristics of the amplifier; and for each of the gain, phase and efficiency characteristics, generating a three dimensional plot of the characteristic with respect to input power and supply voltage applied to the amplifier.
    Type: Application
    Filed: March 28, 2013
    Publication date: March 26, 2015
    Inventors: Garvin Wills, Gerard Wimpenny
  • Patent number: 8958999
    Abstract: A differential measurement design employing two nearly collinear optical beams provides surface plasmon polariton resonance (SPR) sensors and a corresponding method of increased dynamic range and signal to noise ratio. The differential measurement device and method based on wavelength interrogation, employs a single incident polarization state, and is combined with a 2-D nanohole array for operation at near-normal incidence, where this approach offers a decrease in the measurement time.
    Type: Grant
    Filed: August 1, 2011
    Date of Patent: February 17, 2015
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Joanna N. Ptasinski, Lin Pang, Pang-Chen Sun, Boris Slutsky, Yeshaiahu Fainman