| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 702071000 | Waveform-to-waveform comparison | 39 |
| 20080215271 | SURFACE PROFILING APPARATUS - Light from a broadband source ( | 09-04-2008 |
| 20080270055 | ANALOG SYSTEM FOR COMPUTING SPARSE CODES - A parallel dynamical system for computing sparse representations of data, i.e., where the data can be fully represented in terms of a small number of non-zero code elements, and for reconstructing compressively sensed images. The system is based on the principles of thresholding and local competition that solves a family of sparse approximation problems corresponding to various sparsity metrics. The system utilizes Locally Competitive Algorithms (LCAs), nodes in a population continually compete with neighboring units using (usually one-way) lateral inhibition to calculate coefficients representing an input in an over complete dictionary. | 10-30-2008 |
| 20090018787 | APPARATUS AND METHOD FOR DETERMINING THE SLEW RATE OF A SIGNAL PRODUCED BY AN INTEGRATED CIRCUIT - Determining a slew rate of a signal from an integrated circuit under test by comparing the signal with a first reference voltage, comparing the signal with a second reference voltage different from the first reference voltage, generating an output pulse having a pulse width indicative of a slew rate of the signal, and integrating the output pulse over time to generate an output voltage proportional to the pulse width; wherein the output voltage is indicative of the slew rate of the signal produced by the integrated circuit. | 01-15-2009 |
| 20090043522 | SYSTEM AND METHOD FOR DISTORTION ANALYSIS - A method, circuit, and computer program product for receiving a first intermediate signal that is at least partially based upon a first reference signal. A second intermediate signal is received that is a time-shifted version of the first intermediate signal. An output signal is generated that is based upon the difference between the first intermediate signal and the second intermediate signal. An anticipated differential change in the output signal is determined, the anticipated differential change to occur based upon a transition in the first reference signal. A realized differential change in the output signal is measured, the realized differential change occurring based upon a transition in the first reference signal. The realized differential change in the output signal is compared to the anticipated differential change in the output signal to determine a nonlinearity indicator. | 02-12-2009 |
| 20090281752 | SKEW MEASUREMENT APPARATUS, SKEW MEASUREMENT METHOD, RECORDING MEDIA AND TEST APPARATUS - Provided is a skew measurement apparatus, including sampling sections that each sample one of a plurality of signals under measurement having a cycle T, a waveform reconfiguring section that shapes a reconfigured waveform having the cycle T by rearranging ordinal ranks of sample values of the signal under measurement sampled by each sampling section, a distribution generating section that generates a timing distribution of edges in the reconfigured waveform of the corresponding signal under measurement, and a skew calculating section that calculates skew between the signals under measurement being compared based on the timing distribution of each signal under measurement. | 11-12-2009 |
| 20100106440 | Method and Apparatus for Spectral Cross Coherence - The present invention relates to a machine implemented method for spectral analysis that determines a measure of cross coherence between application of two spectral estimation filters to data; and identifies a spectral feature of the measure of cross coherence. One example embodiment of the present invention provides a complete statistical summary of the joint dependence of the Bartlett and Capon power spectral statistics, showing that the coupling is expressible via a 2×2 complex Wishart matrix, where the degree coupling is determined by a single measure of cross coherence defined herein. This measure of coherence leads to a new two-dimensional algorithm capable of yielding significantly better resolution than the Capon algorithm, often commensurate with but at times exceeding finite sample based MUSIC. | 04-29-2010 |
| 20100106441 | DETECTION OF AN ABNORMAL SIGNAL IN A COMPOUND SAMPLED SIGNAL - A technique detects an abnormal signal in a compound sampled signal recorded in the time domain. The technique involves dividing the sampled signal recorded in the time domain into sample segments; transforming each of the sample segments from the time domain into the frequency domain to determine transformed segments, each transformed segment having frequency points, each frequency point having an amplitude associated with a certain frequency; for a frequency point in a given transformed segment, determining a ratio by dividing the amplitude of the frequency point by a value indicative of an average of the amplitudes of the frequency points at the same frequency across transformed segments; repeating the determination of a ratio for frequency points in each transformed segment to determine ratios for each transformed segment; repeating the determination of ratios for transformed segments; and using the ratios to detect the abnormal signal in the compound sampled signal. | 04-29-2010 |
| 20100153043 | MONITORING METHOD FOR THROUGH-SILICON VIAS OF THREE-DIMENSIONAL INTERGRATED CIRCUIT (3D IC) AND APPARATUS USING THE SAME - A monitoring method for Through-Silicon Vias (TSVs) of a three-dimensional integrated circuit (3D IC) is provided, wherein the 3D IC includes a plurality of TSVs, and the method includes: providing a plurality of inverters; connecting the inverters with the TSVs as a circuit; enabling the circuit to oscillate; measuring an output signal on an output end of one of the inverters; and determining the characteristic of TSVs of the 3D IC based on the output signal. | 06-17-2010 |
| 20100198540 | SIGNAL PROCESSING APPARATUS AND SIGNAL PROCESSING METHOD - An apparatus includes a test signal generation unit supplying test signals to an orthogonal modulator and a control unit that based on a result of decision by comparison and decision of detection results of a detector detecting envelopes of modulated signals output from the orthogonal modulator responsive to the test signals, derives adjustment values and a compensation value. An estimation means estimates a DC offset and an IQ mismatch of the orthogonal modulator, based on the derived compensation value. The test signals includes a first set including a first test signal (I | 08-05-2010 |
| 20100332171 | COUNTING DEVICE, PHYSICAL QUANTITY SENSOR, COUNTING METHOD, AND PHYSICAL QUANTITY MEASURING METHOD - A tension/speed measuring device comprises a laser driver for driving the oscillation of a semiconductor laser, and a counter for counting interference waveforms included in the output of a photodiode for converting the output of the semiconductor laser into an electrical signal. The counter measures the periods of interference waveforms during a measuring interval, where a frequency distribution for the periods of the interference waveforms during the measuring interval is generated from the measuring results, where a class value wherein the product of the class value and the frequency is a maximum is used as a representative value D | 12-30-2010 |
| 20110224931 | METHOD FOR MEASURING SCATTERING ABSORBER AND DEVICE FOR MEASURING SCATTERING ABSORBER - Acquired is the internal information of a scattering medium more accurately and easily, with the influence of an instrumental function taken into account, even where noise is contained in a measurement waveform. | 09-15-2011 |
| 20120166120 | Method Capable Of Discriminating Between A Gamma Component And A Neutron Component In An Electronic Signal - The invention concerns a method capable of discriminating between a gamma component and neutron component in an electronic signal (S | 06-28-2012 |
| 20130173194 | OPTICAL EIGENMODE IMAGING - A method of optimising at least one measure that is a quadratic function of a wavefunction, such as the spot size of a laser, the method comprising: superimposing a plurality of wavefunctions; determining a relationship between the superimposed wavefunctions and the quadratic measure, and using the determined relationship to identify the superimposed wavefunctions that provide a desired or optimised quadratic measure. | 07-04-2013 |
| 20130226490 | Motion Sensor, Method, and Computer-Readable Storage Medium Providing a Motion Sensor with a State Processor Having a Reduced Amount of State Chatter - A motion sensor has a state processor to identify states associated with a magnetic field signal provided by a magnetic field sensing element. The state processor includes a state peak logic module configured to generate states that have a reduced amount of state chatter. | 08-29-2013 |
| 20150088446 | APPARATUS AND METHOD FOR SELECTING WAVEFORM FOR SIDE-CHANNEL ANALYSIS - An apparatus and method for selecting a waveform for side-channel analysis are provided. The apparatus for selecting a waveform for side-channel analysis includes a matrix generation unit, a waveform transform unit, and a waveform selection unit. The matrix generation unit generates covariance matrices based on waveforms collected by a waveform collection apparatus. The waveform transform unit determines a 1st principal component using the generated covariance matrices, and to transform the waveforms using the determined 1st principal component. The waveform selection unit selects a waveform for the side-channel analysis from the transformed waveforms. | 03-26-2015 |
| 702072000 | Phase comparison | 22 |
| 20090105979 | Fixed reference frame phase-locked loop (FRF-PLL) for unbalanced line voltage conditions - The present invention is an algorithm to implement a phase-locked loop (PLL) which is able to provide an estimation of the angular frequency, and both the positive and negative sequences of the fundamental component of a three-phase signal. These sequences are provided in fixed reference frame coordinates, and thus the proposed algorithm is referred as fixed reference frame PLL (FRF-PLL). In fact, the FRF-PLL does not require transformation of variables into the synchronous reference frame coordinates as in most PLL schemes. The detection of the positive sequence component of the source voltage at fundamental frequency is essential for the control and synchronization of systems coupled with the electric network, which are required to run even under grid disturbances such as unbalanced voltages, voltages sags, harmonic distortion and angular frequency variations. The design of the FRF-PLL is based on a complete description of the source voltage involving both positive and negative sequences in stationary coordinates and considering that the angular frequency is uncertain. Therefore the FRF-PLL is intended to perform properly under unbalanced conditions, and to be robust against angular frequency variations, providing a fast and precise response. | 04-23-2009 |
| 20090112500 | Memory-Based High-Speed Interferometer - An interferometer produces a first optical signal and a second optical signal interfering with each other. The optical signals are converted digital signals form addresses. A memory stores data values corresponding to the first and second optical signals, and in which the addresses are used to directly read the data values stored at the addresses. The data values stored in the memory can be dynamically adapting while converting the first and second optical signals and reading the data values. | 04-30-2009 |
| 20100088053 | PHASE DETECTION DEVICE AND POSITION DETECTION DEVICE - Provided is a phase detection device which can detect a phase by using a simple configuration. The phase detection device | 04-08-2010 |
| 20100161263 | INDEPENDENT FREQUENCY MEASUREMENT AND TRACKING - Independent frequency measurement and tracking of a signal using a measurement interval where the frequency of the signal is measured and a sampling rate is calculated, and a settling interval where the frequency of the signal is not measured. The sampling rate is calculated to correspond with the frequency of the signal and updated only after the calculation of the sampling rate in the measuring interval. The signal may be a signal of an electric power system such as a voltage waveform or a current waveform. The frequency calculation may include determination of a rate of rotation of a positive-sequence phasor of the signal. | 06-24-2010 |
| 20100241379 | METHOD OF ANALYZING AN INTEGRATED CIRCUIT, METHOD OF OBSERVATION AND THEIR ASSOCIATED INSTALLATIONS - A method for analyzing an integrated circuit includes: a step ( | 09-23-2010 |
| 20110022340 | Measuring Quantum States of Superconducting Resonators - A method for measuring the quantum state of a resonator includes, exciting an input port of a circuit with signal, measuring a phase shift of the signal at an output port of the circuit, wherein the resonator is coupled to the input and the output ports, and calculating a quantum state of the resonator as a function of the measured phase shift of the signal. | 01-27-2011 |
| 20110130991 | PHASE IDENTIFICATION SYSTEM AND METHOD - A method to identify phase is presented. The method includes obtaining electrical parameters at a node and a substation of an electrical grid, processing the electrical parameters of the node and the substation into processed electrical parameters comprising at least one of a voltage harmonic amplitude, a current harmonic amplitude, a geometric harmonic modulated signal, and a noise pattern. The method further includes comparing the processed electrical parameters from the node and the substation and identifying phase information of the node with respect to the substation. | 06-02-2011 |
| 20110130992 | PHASE IDENTIFICATION SYSTEM AND METHOD - A phase identification system is proposed. The system includes a sensor coupled to a terminal of a distribution transformer. A processor is coupled to the sensor for processing phase information of the terminal, wherein the sensor and the processor are embedded within a bushing unit on the distribution transformer. The processor is further configured to identify and display phase information at the distribution transformer. | 06-02-2011 |
| 20110251810 | METHOD AND SYSTEM FOR POWERLINE LENGTH MEASUREMENT - A method and system are provided for determining a length quantity of a power transmission line, which connects a first location with a second location. A first signal having a first carrier frequency is provided at the first location. The first signal is transmitted from the first location to the second location via the power transmission line. A second signal having a second frequency is provided at the second location. A first phase difference between the first signal and the second signal is measured at the second location, and the length quantity is calculated from the measured phase difference. In the system, a second receiver at the second location is configured to receive the first signal having the first carrier frequency from the first location. A frequency generator creates the second signal having the second frequency at the second location. The receiver includes a phase detection device configured to detect a first phase difference between the second frequency and the first carrier frequency at the second location. | 10-13-2011 |
| 20110288801 | METHOD AND SYSTEM FOR DETERMINING THE TIME-OF-FLIGHT OF A SIGNAL - A method of estimating the time of flight of a burst signal includes: receiving the burst signal; determining the slope of the phase characteristic of the Fourier transform of the received burst signal; and estimating the time-of-flight of the burst signal from the slope of the phase characteristic of the Fourier transform of the received burst signal. | 11-24-2011 |
| 20110301895 | PHASE MEASURING DEVICE AND FREQUENCY MEASURING DEVICE - This disclosure provides a phase measuring device that can measure phase differences with high precision using the digital circuits. A phase measuring device includes a buffer delay measuring circuit and a phase difference measuring circuit which use a TDC, respectively, and a phase difference calculator. The buffer delay measuring circuit generates delay measurement data indicating a delay amount τ | 12-08-2011 |
| 20120109559 | DISCRETE FOURIER TRANSFORM IN A COMPLEX VECTOR SPACE - An image-based phase retrieval technique has been developed that can be used on board a space based iterative transformation system. Image-based wavefront sensing is computationally demanding due to the floating-point nature of the process. The discrete Fourier transform (DFT) calculation is presented in “diagonal” form. By diagonal we mean that a transformation of basis is introduced by an application of the similarity transform of linear algebra. The current method exploits the diagonal structure of the DFT in a special way, particularly when parts of the calculation do not have to be repeated at each iteration to converge to an acceptable solution in order to focus an image. | 05-03-2012 |
| 20120150468 | Method and System for Estimating and Tracking Frequency and Phase Angle of 3-Phase Power Grid Voltage Signals - A method estimates parameters of 3-phase voltage signals to synchronize a power grid in a presence of a voltage unbalance by transforming the 3-phase voltage signals to αβ-reference signals using a Clark transformation matrix, and estimating sinusoidal signals and corresponding quadrature signals of the αβ-reference signals using an extended Kalman filter, and determining a phase angle of a positive sequence based on a relationship of the phase angle to the estimated the sinusoidal signals. | 06-14-2012 |
| 20120232820 | GRID OSCILLATION ANALYSIS METHOD AND APPARATUS THEREFOR - A method for determining the contribution of a grid subsystem ( | 09-13-2012 |
| 20120239329 | SAGNAC PHASE SHIFT TRACKING METHOD FOR FIBER-OPTIC GYROSCOPES - A Sagnac phase shift tracking method of fiber-optic gyroscopes comprises determining, for both a current time and a previous time, a value of a primary harmonic demodulated signal and a value of a secondary harmonic demodulated signal from a detector output in the fiber-optic gyroscope; and determining the Sagnac phase shift of the fiber-optic gyroscope for the current time based on the values of the primary harmonic demodulated signal and the secondary harmonic demodulated signal for both the current time and the previous time. | 09-20-2012 |
| 20130024149 | IDENTIFICATION OF ELECTRICAL GRID PHASE INFORMATION FOR END-POINTS IN A GRID NETWORK - In one embodiment, a requesting device (e.g., head-end application) requests a phase-related response from an end-point that does not know its phase in a polyphase power source system. In response, the requesting device receives the phase-related response from the end-point, where the response relays an identification of the end-point and related phase information without indicating an actual phase of the end-point, e.g., on which power-line is a response generated or at which time is a zero-crossing of the power source's waveform. The phase information of the phase-related response may then be correlated to a known phase of a known-phase device, such that the actual phase of the end-point may be identified based on the correlation. | 01-24-2013 |
| 20130035887 | METHOD AND SYSTEM OF PHASE IDENTIFICATION - Described herein are embodiments of methods and systems of phase identification. One embodiment of the method comprises adjusting one or more operational characteristics of an electrical device; receiving information about changes in at least one electrical parameter of one or more phases of a poly-phase electrical system that provides electrical energy to the electrical device; correlating the changes in the at least one electrical parameter of the one or more phases of the poly-phase electrical system that provides electrical energy to the electrical device with the adjustment of the one or more operational characteristics of the electrical device; and identifying the one or more phases of the poly-phase electrical system that provide electrical energy to the electrical device based upon the correlation of the changes in the at least one electrical parameter of the one or more phases of the poly-phase electrical system that provides electrical energy to the electrical device with the adjustment of the one or more operational characteristics of the electrical device. | 02-07-2013 |
| 20130090875 | PROTECTIVE RELAYING DEVICE - According to one embodiment, a protective relaying device includes a phase difference calculating unit configured to calculate a phase difference between a phase obtained by shifting a phase of first current data by 180°, and a phase of second current data, a setting unit configured to calculate a target value of elimination of a sampling synchronization error caused by a difference between a transmission delay time of up-transmission, and a transmission delay time of down-transmission on the basis of the phase difference, and to set the calculated target value, and a sampling synchronization control unit configured to carry out control of sampling synchronization such that a difference between a time TM and a time TF. | 04-11-2013 |
| 20130304407 | CHANNEL INTEGRITY DETECTION - A computer-implemented method can include determining an amplitude for each of a plurality of input channels, corresponding to respective nodes. A measure of similarity can be computed between the input channel of each node and the input channel of its neighboring nodes. The method can also include comparing an amplitude for each node relative to other nodes to determine temporary bad channels. For each of the temporary bad channels, a measure of similarity can be computed between the input channel of each node and the input channel of its neighboring nodes. Channel integrity can then be identified based on the computed measures of similarity. | 11-14-2013 |
| 20140088902 | METHOD AND APPARATUS FOR DIGITAL DEMODULATION AND FURTHER PROCESSING OF SIGNALS OBTAINED IN THE MEASUREMENT OF ELECTRICAL BIOIMPEDANCE OR BIOADMITTANCE IN AN OBJECT - Methods and apparatus for digital demodulation of signals obtained in the measurement of electrical bioimpedance or bioadmittance of an object. One example comprises: generating an excitation signal of known frequency content; applying the excitation signal to the object; sensing a response signal of the object; sampling and digitizing the response signal to acquire a digitized response signal representing the response signal with respect to frequency content, amplitude and phase; correlating, for each frequency f | 03-27-2014 |
| 20140180617 | INVERTER-DRIVEN ROTARY ELECTRIC MACHINE, PHASE-TO-PHASE INSULATION PARTIAL DISCHARGE INSPECTION METHOD AND PHASE-TO-PHASE INSULATION PARTIAL DISCHARGE INSPECTION APPARATUS - A phase-to-phase insulation partial discharge inspection apparatus includes: an impulse power supply ( | 06-26-2014 |
| 20160003879 | OSCILLATION ANALYSIS METHOD AND APPARATUS THEREFOR - The present invention relates to apparatus ( | 01-07-2016 |
| 702073000 | Identification of waveform | 2 |
| 20110161028 | Signal Processing Apparatus and Method Thereof - A signal processing apparatus for determining whether a receiving signal is a target signal is provided. The apparatus includes: a sampling device for sampling the receiving signal to generate a plurality of sampled values; a first calculation device, coupled to the sampling device, for generating a plurality of first values according to the sampled values and a plurality of reference values; a second calculation device, coupled to the first calculation device, for grouping the first values into a plurality of value groups, respectively calculating the value groups to generate a plurality of second values and generating a determination value by calculating the second values; and a determination device, coupled to the second calculation device, for determining whether the receiving signal is the target signal by comparing the determination value with a threshold value. | 06-30-2011 |
| 20140019076 | MEDICAL DEVICE IDENTIFIER - A medical device identifier can identify an implanted medical device. In one example arrangement, the medical device identifier sends electromagnetic signals to the implanted device according to one or more stored digitized waveforms. The device then senses any returned electromagnetic signals, and identifies the implanted device based on the returned electromagnetic signals. The medical device identifier may generate the electromagnetic signals from the stored digitized waveforms using an analog-to-digital converter, and may compare the returned electromagnetic signals with one or more stored digital templates corresponding to different device manufacturers. The comparison may be performed using cross correlation. In another aspect, a portal device includes an identification subsystem for identifying the provider of a medical device, and a communication subsystem for establishing two-way communication a call center servicing medical devices from an identified provider. The portal device may relay information between the medical device and the identified provider. | 01-16-2014 |
