Frequency Patents (Class 702/75)
  • Patent number: 10309995
    Abstract: 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.
    Type: Grant
    Filed: October 5, 2016
    Date of Patent: June 4, 2019
    Assignee: ABB Schweiz AG
    Inventors: Nilanga Abeywickrama, Robert Saers, Tord Bengtsson, Jonas Hedberg
  • Patent number: 10302449
    Abstract: The present invention provides a step counting method and device.
    Type: Grant
    Filed: December 25, 2014
    Date of Patent: May 28, 2019
    Assignee: GOERTEK INC.
    Inventors: Song Liu, Fupo Wang, Na Li
  • Patent number: 10263727
    Abstract: A system and method for mitigating interference of a radio frequency (RF) signal includes a receiver configured to include: a decomposition module that decomposes a received RF signal into sub-bands via a multi-stage filter, each sub-band being configured to operate on real and imaginary components of the RF signal, and each stage being scaled for separating time-frequency content of the desired signal from time-frequency content of the interference; a mitigation module that suppresses the interference of the RF signal in each sub-band by zeroing an output of a respective sub-band when the frequency content exceeds a predetermined threshold; and a reconstruction module that reconstructs the RF signal from the mitigation module minus the interference. The receiver is configured to determine whether the multi-stage filter is to be reinitialized with updated time and frequency resolution requirements to improve system response.
    Type: Grant
    Filed: April 3, 2017
    Date of Patent: April 16, 2019
    Inventor: Frank Hudson
  • Patent number: 9761243
    Abstract: Techniques are provided for vector noise cancellation. Different value combinations for a plurality of weighting factors may be established for a plurality of selection regions. Each value combination for the plurality of weighting factors may correspond to a different combination of a set of input signals. One or more characteristics of input signals may be used to select a particular selection region. A particular value combination of the set of weighting factors may be chosen to attenuate or amplify the input signals to generate one or more output signals.
    Type: Grant
    Filed: June 12, 2015
    Date of Patent: September 12, 2017
    Assignee: Dolby Laboratories Licensing Corporation
    Inventor: Jon C. Taenzer
  • Patent number: 9748966
    Abstract: A system includes an analog-to-digital converter (ADC) including an ADC input terminal; an ADC output terminal; and analog components configured to convert an analog signal received at the ADC input terminal to a digital signal. The system also includes a histogram estimation circuit coupled to the ADC output terminal and configured to generate information on a plurality of codes generated by the ADC and determine a region defining a range of codes corresponding to an occurrence of an error caused by the analog components of the ADC. The system also includes a dither circuit coupled to the ADC input terminal and configured to introduce a dither in the analog signal to generate a modified analog signal.
    Type: Grant
    Filed: August 8, 2016
    Date of Patent: August 29, 2017
    Assignee: Texas Instruments Incorporated
    Inventors: Viswanathan Nagarajan, Srinivas Kumar Reddy Naru, Ratna Kumar Venkata Parupudi
  • Patent number: 9557833
    Abstract: In one embodiment, a method includes receiving a signal at a stylus. The stylus is operable to wirelessly transmit signals to and receive signals from a device. The stylus includes a plurality of electrodes disposed in a tip of the stylus. The method includes determining a characteristic of the signal, and based at least in part on the characteristics of the signal, a threshold for determining whether to process signals received wirelessly from the device is dynamically adjusted.
    Type: Grant
    Filed: December 22, 2011
    Date of Patent: January 31, 2017
    Assignee: Atmel Corporation
    Inventors: Kishore Sundara-Rajan, Trond Jarle Pedersen, Vemund Kval Bakken
  • Patent number: 9552084
    Abstract: A manner of reducing the power consumption is utilized in a tablet terminal equipped with a digitizer for inputting with an electronic pen. When another tablet terminal or a smartphone approaches the tablet terminal, each digitizer detects input. When the digitizer detects the input, it is determined whether the input is electronic pen input from the electronic pen or proximity input caused by the proximity of the other tablet terminal or the smartphone. In the case of electronic pen input, coordinate information is transferred to a system, while in the case of proximity input, the system takes an action such as shifting a tablet terminal to a sleep state.
    Type: Grant
    Filed: August 20, 2014
    Date of Patent: January 24, 2017
    Assignee: Lenovo (Singapore) PTE. LTD.
    Inventors: Hiromoto Takahashi, Takenobu Nakao, Takumi Imai
  • Patent number: 9548067
    Abstract: An estimate of a pitch of a signal may be computed by using correlations of frequency portions of a frequency representation of the signal. An initial pitch estimate may be obtained and frequency portions of the frequency representation may be identified using multiples of the initial pitch estimate. Correlations of the frequency portions may be computed, and a score for the initial pitch estimate may be determined using the correlations. A second pitch estimate may be determined using the first score, and the process may be repeated.
    Type: Grant
    Filed: December 15, 2015
    Date of Patent: January 17, 2017
    Inventors: David C. Bradley, Yao Huang Morin, Sean O'Connor
  • Patent number: 9454511
    Abstract: The present embodiments include methods of time-frequency analyzing signals. Some embodiments provide methods of processing signals comprising: receiving a communication signal; adaptively partitioning the signal in a time domain into a plurality of windows of the signal; transforming each of the windows of the signal producing respective expansions in a frequency domain and obtaining respective samples of the windows of signal in the frequency domain; and mapping the samples in the frequency domain back into the time domain.
    Type: Grant
    Filed: May 4, 2012
    Date of Patent: September 27, 2016
    Inventors: Stephen D. Casey, Brian M. Sadler
  • Patent number: 9436214
    Abstract: Aspects of the invention are related to a method for synchronizing a first sensor clock of a first sensor. The exemplary method comprises: correcting the first sensor clock for a first time, transferring data from the first sensor, and correcting the first sensor clock for a second time, wherein a time interval between two corrections of the first sensor clock is selected such that the first sensor clock is sufficiently aligned with a processor clock of a processor over the time interval.
    Type: Grant
    Filed: June 13, 2014
    Date of Patent: September 6, 2016
    Assignee: QUALCOMM Incorporated
    Inventors: Radu Pitigoi-Aron, Leonid Sheynblat, Carlos Manuel Puig, Justin Black, Rashmi Kulkarni
  • Patent number: 9396740
    Abstract: Pitch in audio signals may be estimated based on symmetry characteristics independent of harmonic amplitudes. A magnitude spectrum of an audio signal may be provided. The magnitude spectrum may be partitioned by dividing a frequency axis into equal-sized cells. Individual cells may be centered on corresponding harmonic frequencies of a hypothesized pitch. The magnitude spectrum contained in individual cells may be normalized to have equal mean magnitudes and equal standard deviations. A likelihood that the hypothesized pitch is an actual pitch of the audio signal may be determined based on symmetries of magnitude spectra contained in individual cells.
    Type: Grant
    Filed: September 30, 2014
    Date of Patent: July 19, 2016
    Assignee: KnuEdge Incorporated
    Inventor: David C. Bradley
  • Patent number: 9389670
    Abstract: A portable electronic apparatus and a power management method are disclosed. The portable electronic apparatus comprises a processor and an embedded controller (EC). The EC determines whether the processor starts a throttling mechanism according to a current power consumption, a proportional term, a last power consumption, a lower bound, a delta power and a derivative term. The EC determines whether the processor cancels the throttling mechanism according to the current power consumption, the lower bound, a count that the power consumption is lower than the lower bound, and an integral term.
    Type: Grant
    Filed: September 19, 2013
    Date of Patent: July 12, 2016
    Inventors: Chun-Jie Yu, Yu-Hui Chen
  • Patent number: 9249787
    Abstract: A variable speed compression system that is driven by a variable frequency high speed motor that receives power from a high frequency generation unit that is driven by a high speed gas turbine is provided. The speed of the turbine may be varied to control the output frequency of the high frequency generation unit, thus controlling the output of the compression system by controlling the speed of the turbine driving the generation unit.
    Type: Grant
    Filed: January 27, 2011
    Date of Patent: February 2, 2016
    Assignee: Dresser-Rand Company
    Inventors: Jose L. Gilarranz, Kenneth Devito
  • Patent number: 9241218
    Abstract: An apparatus for decomposing a signal having an number of at least three channels includes an analyzer for analyzing a similarity between two channels of an analysis signal related to the signal having at least two analysis channels, wherein the analyzer is configured for using a pre-calculated frequency dependent similarity curve as a reference curve to determine the analysis result. The signal processor processes the analysis signal or a signal derived from the analysis signal or a signal, from which the analysis signal is derived using the analysis result to obtain a decomposed signal.
    Type: Grant
    Filed: June 6, 2013
    Date of Patent: January 19, 2016
    Assignee: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.
    Inventor: Andreas Walther
  • Patent number: 9157985
    Abstract: A system and method for detecting unknown signals is presented. A system includes a receiver, a multiplier logic, integrator logic and a peak detection logic. The receiver receives a first radio frequency (RF) input containing an unknown signal and first noise and a second RF radio input containing the same unknown signal and a second noise. The second RF input is orthogonally polarized with respect to the first RF input. The multiplier logic multiplies the first RF input with a conjugate of the second RF input to produce a multiplied signal. The integrator logic integrates the multiplied signal to product an integrated signal. The peak detection logic determines a coarse time of arrival (TOA) of a unknown signal located in the integrated signal based, at least in part, on a peak power in the integrated signal.
    Type: Grant
    Filed: February 8, 2013
    Date of Patent: October 13, 2015
    Assignee: BAE Systems Information and Electronic Systems Integration Inc.
    Inventors: Arthur J. Tardif, Danny A. Barnum
  • Patent number: 9134752
    Abstract: A time measurement device includes a first measurement unit configured to measure a clock number of a first reference clock signal within a specific cycle of a second reference clock signal; a calculation unit configured to calculate a physical amount indicating a variance amount of the clock number relative to a reference clock number; a compensation unit configured to compensate an expected measurement value indicating the clock number of the first reference clock signal corresponding to a time as a measurement target according to the physical amount calculated with the calculation unit; and an output unit configured to output time information indicating that the clock number of the first reference clock signal reaches the expected measurement value when the clock number of the first reference clock signal measured with the first measurement unit reaches the expected measurement value compensated with the compensation unit.
    Type: Grant
    Filed: November 28, 2012
    Date of Patent: September 15, 2015
    Inventor: Kosuke Yasuda
  • Patent number: 9128504
    Abstract: A signal generation circuit includes: a clock signal generator configured to generate a clock signal and to change a frequency of the clock signal in response to a select signal; a transmission control circuit configured to control transmission of the clock signal based on the select signal; and a counter configured to perform an operation among a count operation and a count stop operation based on an output signal of the transmission control circuit and to output the select signal based on a result of performing the operation. When the counter performs the count operation in response to the clock signal output from the transmission control circuit, the counter outputs a most significant bit (MSB) among its count bits as the select signal.
    Type: Grant
    Filed: January 31, 2013
    Date of Patent: September 8, 2015
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Gil Won Yoon, Yus Ko
  • Publication number: 20150142358
    Abstract: A method for interrogating an elastic wave device includes probing the response of a piezoelectric resonant device at a single frequency alternately on either side of a previously determined first resonance frequency, to characterize this resonance frequency characteristic of the measured physical quantity, by correlating this single measurement with a previously performed measurement.
    Type: Application
    Filed: November 17, 2014
    Publication date: May 21, 2015
    Inventor: Jean-Michel FRIEDT
  • Patent number: 9031791
    Abstract: Aspects of the invention provide systems and methods for using ballast sensors to detect rock fall events in a vicinity of railway tracks or similar roadways or tracks. The ballast sensors are spaced apart from the tracks. Particular embodiments permit the use of signals from the ballast sensors to discriminate rock fall events from other types of events and to detect the hypocenter of a rock fall event.
    Type: Grant
    Filed: December 17, 2010
    Date of Patent: May 12, 2015
    Assignee: Weir-Jones Engineering Consultants Ltd.
    Inventors: Bohdan Nedilko, Iain Weir-Jones
  • Patent number: 9025287
    Abstract: An arc fault detection circuit includes a current sensing circuit coupled to a line conductor carrying a current. The current sensing circuit operates to sense current and output data indicative of the sensed current. A processing circuit implements a frequency transform algorithm to transform the output data to frequency data in a low frequency range and with a high spectral resolution where a minimum short time observation window is concerned. The processing circuit identifies an arc fault condition on the line conductor by identifying differences in said frequency data between at least two subsequent observation windows and identifying characteristics which exceed thresholds.
    Type: Grant
    Filed: December 19, 2012
    Date of Patent: May 5, 2015
    Assignee: STMicroelectronics S.r.l.
    Inventors: Giuseppe Privitera, Antonio Cataliotti, Valentina Cosentino, Giovanni Artale
  • Patent number: 9018960
    Abstract: A method for enhancing the reliability of generator ground fault detection based on a signal injection scheme, wherein the generator includes a winding. The method includes injecting a test signal at a predefined frequency to the winding, measuring an electrical quantity of a response signal in the winding resulted from the injected test signal, and detecting a ground fault based on the measured value of the electrical quantity. The method further includes continuously determining the frequency of the response signal, and discarding the present measured value corresponding to the determined frequency when the determined frequency deviates from the predefined frequency with a first threshold value.
    Type: Grant
    Filed: August 21, 2013
    Date of Patent: April 28, 2015
    Assignee: ABB Research Ltd.
    Inventors: Henrik Johansson, Joseph Menezes, Stefan Roxenborg, Tord Bengtsson
  • Patent number: 8972215
    Abstract: At least one parameter of a signal is determined, wherein the signal is a sinusoidal signal including noise, wherein the parameter includes at least one of a frequency of the signal, and an angle of a phase of the signal. The frequency of the signal is determined iteratively based on a linear relationship among the frequency of the signal, samples of the noise, and samples of the signal using a statistical correlation among the samples of the noise. During a current iteration the statistical correlation is updated based on the frequency of the signal determined during a previous iteration, and the samples of the signal are updated with values of the signal during a current period of time.
    Type: Grant
    Filed: March 30, 2011
    Date of Patent: March 3, 2015
    Assignee: Mitsubishi Electric Research Laboratories, Inc.
    Inventors: Zafer Sahinoglu, Ming Sun, Koon Hoo Teo
  • Patent number: 8924174
    Abstract: Methods, systems, and devices for determining a power flow are described herein. One method includes determining a temperature of a circuit conductor while the circuit conductor is conducting a current, and determining a power flow associated with the circuit conductor based, at least in part, on the determined temperature.
    Type: Grant
    Filed: July 19, 2011
    Date of Patent: December 30, 2014
    Assignee: Honeywell International Inc.
    Inventor: Julie J. Hull Roskos
  • Patent number: 8924173
    Abstract: Methods, systems, and devices for determining a harmonic are described herein. One method includes determining a temperature of a circuit conductor while the circuit conductor is conducting a current, and determining a harmonic associated with the circuit conductor based, at least in part, on the determined temperature.
    Type: Grant
    Filed: July 19, 2011
    Date of Patent: December 30, 2014
    Assignee: Honeywell International Inc.
    Inventor: Julie J. Hull Roskos
  • Publication number: 20140369087
    Abstract: A method and an apparatus for determining a phase and a frequency of an electric quantity being associated with an operation of an electrical device are described. The method comprises extracting a fundamental component of the electric quantity, calculating a positive sequence component of the electric quantity based on the extracted fundamental component, and determining the phase and the frequency of the electric quantity based on the calculated positive sequence component.
    Type: Application
    Filed: February 1, 2013
    Publication date: December 18, 2014
    Inventor: Heng Deng
  • Patent number: 8903669
    Abstract: A method and apparatus for detecting an object. A first collimated beam having a first frequency and a second collimated beam having a second frequency is transmitted. At least one of the first frequency and the second frequency is changed through a range of frequencies and a power level for at least one of the first collimated beam and the second collimated beam is changed through a range of power levels. A range of fundamental difference frequency signals for each power level in the range of power levels are monitored for, in response to transmitting the first collimated beam and the second collimated beam using the range of frequencies and the range of power levels. The range of fundamental difference frequency signals is generated by the object having non-linear electrical characteristics in response to receiving the first collimated beam and the second collimated beam.
    Type: Grant
    Filed: July 16, 2009
    Date of Patent: December 2, 2014
    Assignee: The Boeing Company
    Inventors: Sandor Holly, Donald Elliot Harrington
  • Patent number: 8898027
    Abstract: A method and a system for a comprehensive analysis of low frequency oscillation. The method includes: firstly, initiating a wide area measurement system WAMS (71) to perform real-time monitoring; transmitting real-time low frequency oscillation information to a dynamic early-warning system (72) periodically; then converting the low frequency oscillation information received by the dynamic early-warning system (72) into an input file for stability calculation with small disturbance, and performing related calculation; finally, transmitting the calculated result back to the wide area measurement system WAMS (71) and a human-machine system interface for output. The system includes: the wide area measurement system WAMS (71), the dynamic early-warning system (72), a system for stability calculation with small disturbance (73) and an output system (74).
    Type: Grant
    Filed: September 4, 2009
    Date of Patent: November 25, 2014
    Assignee: State Grid Corporation of China
    Inventors: Yaozhong Xin, Fang Li, Jingtao Wu, Hongzhu Tao, Jianfeng Yan, Gang Duan, Fang Tian, Yu Dong, Wei Zhang
  • Patent number: 8886474
    Abstract: An apparatus for testing one or more transmission lines is disclosed. The apparatus comprises a processor capable of configuring the apparatus in one of a master mode and a slave mode. The apparatus when configured in the master mode controls the testing of the one or more transmission lines of a cable. The apparatus also includes one or more test modules associated with one or more tests to be performed on the one or more transmission lines. Further, one or more transceivers of the apparatus are capable of one or more of sending and receiving a plurality of signals through the one or more transmission lines. One or more signals of the plurality of signals are associated with the one or more test modules.
    Type: Grant
    Filed: September 6, 2011
    Date of Patent: November 11, 2014
    Assignee: Psiber Data Pte Ltd
    Inventors: Patel Arvindbhai Chimanbhai, Xing Zhu, Pandya Harshang Nileshkumar, Ravi Kishore Doddavaram
  • Patent number: 8880372
    Abstract: A system for instantaneous and continuous nanosecond-level accuracy determination of a relative time offset between at least two non-collocated timing units, the system including at least two non-collocated timing units located at known positions, each timing unit comprising a frequency source and a collocated receiver, each frequency source being disciplined at a frequency domain using a time source to generate corrections of the relative frequency drift between the frequency source and the time source.
    Type: Grant
    Filed: April 29, 2010
    Date of Patent: November 4, 2014
    Assignee: Israel Aerospace Industries Ltd.
    Inventors: Jacob Rovinsky, Ernest Solomon, Maxim Hankin, Israel Kashani
  • Publication number: 20140324372
    Abstract: A system, instructions and a method of determining when an impending failure is likely to occur absent corrective action are disclosed. The system samples the output of a power supply which powers an electrostatic chuck, and determines when that output is outside acceptable limits. The output is sampled at a sufficiently high frequency so as to detect transient anomalies, which are not detectable at lower sampling rates. In some embodiments, the output is converted to a frequency spectrum. The empirical model is compared to known good reference models and, in some embodiments, failure reference models of known failure modes to determine whether an impending failure will occur, and which type of failure.
    Type: Application
    Filed: April 29, 2013
    Publication date: October 30, 2014
    Applicant: Varian Semiconductor Equipment Associates, Inc.
    Inventors: David E. Suuronen, Scott E. Peitzsch
  • Patent number: 8868364
    Abstract: In one embodiment, a measuring device may comprise two oscillators. The first oscillator may generate a local reference signal in a frequency detector to detect a fundamental frequency of the alternating current (AC). The second oscillator may generate two substantially mutually orthogonal sinusoid signals having the selected frequency. The measuring device further may comprise a first group of multipliers that mixes the two sinusoid signals with a current and a voltage data signal of the AC respectively, a group of low-pass filters for removing high frequency components from the multiplication products, a second group of multipliers for mixing the filtered multiplication products respectively, and a plurality of adders each to sum together a pair of multiplication products of the second group of multipliers.
    Type: Grant
    Filed: April 29, 2011
    Date of Patent: October 21, 2014
    Assignee: Analog Devices, Inc.
    Inventor: Gabriel Antonesei
  • Publication number: 20140303918
    Abstract: A method, resonance handling device and computer program product are disclosed for handling resonances in a power transmission system. The resonance handling device can include a resonance frequency determining unit configured to obtain measurements (y1, y2, yr) from measurement devices in the power transmission system, apply the measurements in at least one state space model (M1, M2) and determine modal resonance frequencies (?j) in the system based on the application of the system measurements in the state space model, and an activity determining unit configured to determine the modal activity of at least one of the resonance frequencies.
    Type: Application
    Filed: June 20, 2014
    Publication date: October 9, 2014
    Applicant: ABB RESEARCH LTD
    Inventors: Mats LARSSON, Valentin B├╝rgler, Priscilla Owen, Michael Geiger
  • Patent number: 8855932
    Abstract: The present invention is directed to an apparatus and method for remotely measuring surface air pressure. In one embodiment, the method of the present invention utilizes the steps of transmitting a signal having multiple frequencies into the atmosphere, measuring the transmitted/reflected signal to determine the relative received power level of each frequency and then determining the surface air pressure based upon the attenuation of the transmitted frequencies.
    Type: Grant
    Filed: June 4, 2007
    Date of Patent: October 7, 2014
    Assignee: The United States of America as represented by the Administrator of the National Aeronautics and Space Administration
    Inventors: Bing Lin, Yongxiang Hu
  • Patent number: 8849587
    Abstract: A method for determining the health of a transformer through vibration measurement is disclosed. A vibratory signal, in the form of a physical mechanical vibration or auditory signal, is received at a sensor. The vibratory signal is converted into a frequency representation of the signal to derive its harmonics. Based on the power level for the harmonics in the vibratory signal, the harmonic current ratios in the transformer are calculated. The harmonic current ratios are summed together to quantify the health of the transformer. This value is called a K-factor, and is a quantification of the health of the transformer.
    Type: Grant
    Filed: December 27, 2011
    Date of Patent: September 30, 2014
    Inventors: Neal Fredrick Lightle, John Francis Jansen
  • Patent number: 8843329
    Abstract: A method for filling level measuring includes generating an echo curve. The echo curve is analyzed by at least one analysis method selected from analysis methods including analyzing the echo curve by at least two parallel tasks or is analyzed by comparing the echo curve with a spurious-echo curve at the IF-level.
    Type: Grant
    Filed: February 25, 2010
    Date of Patent: September 23, 2014
    Assignee: VEGA Grieshaber KG
    Inventors: Karl Griessbaum, Josef Fehrenbach, Thomas Deck, Winfried Rauer, Martin Gaiser
  • Publication number: 20140278171
    Abstract: A method for reducing noise from an electrical signal includes: obtaining a sampling rate for the electrical signal. The sampling rate is a rate at which voltage readings are obtained for the electrical signal. Each voltage reading comprises a data component and a noise component. A time interval is determined from the sampling rate. A number of voltage readings are obtained. Each voltage reading is obtained one time interval of time after a previous voltage reading is obtained. At each time interval: a voltage reading is obtained; the obtained voltage reading is applied to a low-pass filter; a noise value is obtained from the low-pass filter; and the noise value is subtracted from the voltage reading.
    Type: Application
    Filed: March 15, 2013
    Publication date: September 18, 2014
    Inventors: Robert James Kahlke, Steven D. Baker
  • Patent number: 8831909
    Abstract: Step detection and step length estimation techniques include detecting salient points in sensor data of one or more sensors. A step frequency is estimated based on a time interval between the detected salient points. A step length of the step may then be computed based on a nonlinear combination of the estimated step frequency and a function of the sensor data, and/or a step model. Alternatively, the step length of the step may be computed based on a combination of a nonlinear function of the estimated step frequency and a (linear or nonlinear) function of the sensor data, and/or a step model.
    Type: Grant
    Filed: September 22, 2011
    Date of Patent: September 9, 2014
    Assignee: Microsoft Corporation
    Inventors: Fan Li, Chunshui Zhao, Feng Zhao
  • Patent number: 8825421
    Abstract: Methods and systems for tracking an electronic signal corresponding to an operating frequency of an electronic component are provided. A method may include sampling the signal to determine previous and current time samples of the signal. A frequency of interest in the signal may also be pre-warped to decrease adverse warping effects resulting from processing signals having relatively higher operating frequencies. The previous and current time samples of the signals, along with the pre-warped frequency of interest, may be input into a digital tracking filter. The digital tracking filter may be configured to execute one or more algorithms on the previous and current time samples and the pre-warped frequency of interest to estimate a current operating frequency.
    Type: Grant
    Filed: January 7, 2013
    Date of Patent: September 2, 2014
    Assignee: Rockwell Automation Technologies, Inc.
    Inventors: Brian J. Seibel, Russel J. Kerkman, Carlos Daniel Rodriquez-Valdez
  • Publication number: 20140225451
    Abstract: A method of detecting whether a receiver coil is near a transmit coil in a wireless power transfer system (WPTS), the method involving: applying a pseudo-random signal to the transmit coil; while the pseudo-random signal is being applied to the transmit coil, recording one or more signals produced within the WPTS in response to the applied pseudo-random signal; by using the one or more recorded signals, generating a dynamic system model for some aspect of the WPTS; and using the generated dynamic system model in combination with stored training data to determine whether an object having characteristics distinguishing the object as a receiver coil is near the transmit coil.
    Type: Application
    Filed: April 18, 2014
    Publication date: August 14, 2014
    Applicant: Nucleus Scientific Inc.
    Inventors: Serge R. Lafontaine, Ian W. Hunter
  • Publication number: 20140229133
    Abstract: Parameters of a three phase mixture of sinusoids with harmonic distortion are estimated by first acquiring samples of the signal for no more than a quarter cycle of the signal, a classifier is applied to the samples to obtain noise and signal parameters. Then, initial parameters are estimated to obtain final parameters.
    Type: Application
    Filed: February 12, 2013
    Publication date: August 14, 2014
    Inventors: Zafer Sahinoglu, Zhu Chen
  • Patent number: 8798950
    Abstract: A system for controlling an ultrasonic transducer utilizes an indication of the relative phase of the voltage on the transducer and the current passing through the transducer to control the relative phase to a value that has been preselected to correspond to resonance of an electromechanical system that includes the ultrasonic transducer. In one example application, the system includes a waveform generator that produces an oscillating signal, and the frequency of the oscillating signal is adjustable under control of the control processor. The control processor adjusts the frequency of the oscillating signal according to a proportional control law at least some of the time, and according to a proportional-integral control law at least some of the time. The control processor may also control the amplitude of the oscillation of the ultrasonic transducer.
    Type: Grant
    Filed: August 20, 2010
    Date of Patent: August 5, 2014
    Assignee: Bio-Rad Laboratories, Inc.
    Inventors: Neven Nikolic, Manja Kircanski, Nenad Kircanski, Amir M. Sadri, Milija Timotijevic, Zhiliang Xu
  • Patent number: 8791689
    Abstract: Disclosed is a probe for an oscilloscope comprising a multi-stage transistor amplifier that acts as an impedance transformer. Said amplifier is a d.c.-coupled emitter follower circuit that is composed of bipolar transistors or a d.c.-coupled source follower circuit which is composed of field effect transistors and the successive amplifier elements of which are dimensioned and tuned to each other in such a way that the resulting offset direct voltage between the input and the output is minimal.
    Type: Grant
    Filed: July 16, 2007
    Date of Patent: July 29, 2014
    Assignee: Rohde & Schwarz GmbH & Co. KG
    Inventors: Martin Peschke, Alexander Schild
  • Patent number: 8762087
    Abstract: This invention places plural ring oscillators on a semiconductor chip during manufacture. The respective oscillation frequencies of these ring oscillators are measured. The semiconductor chip is assigned a grade dependent upon the measured frequencies. The ring oscillators are disposed proximate to critical paths on the semiconductor chip and employ circuit types to model the critical path operation under as many the manufacturing variations as possible. A linearly fitted model of ring oscillator frequencies to critical path delays is constructed during characterization after manufacture.
    Type: Grant
    Filed: August 16, 2007
    Date of Patent: June 24, 2014
    Assignee: Texas Instruments Incorporated
    Inventors: Mayur Joshi, Anthony M. Hill, Jose L. Flores
  • Patent number: 8762097
    Abstract: In one aspect, a data processing system includes a virtual temperature sensor to provide system temperature for different system configurations, and a controller coupled to the sensor to control operations of the data processing system according to the virtual temperature. The virtual temperature sensor typically derives the temperature of a particular configuration of the data processing system using mathematical models or one or more operating parameters of the data processing system. In one example, the mathematical models include a characterization table which provides the measured temperature data from various system configurations. These measurements are performed with temperature sensors positioned in ideal locations for different configuration, and are preprocessed to provide the virtual temperature computation. The characterization table also includes thermal characteristics, such as thermal time constant and thermal resistance, of the critical components at multiple thermal control states.
    Type: Grant
    Filed: April 24, 2007
    Date of Patent: June 24, 2014
    Assignee: Apple Inc.
    Inventor: Timothy John Millet
  • Patent number: 8744025
    Abstract: Methods, systems and other embodiments associated with pre-processing a signal for spectral analysis are presented. A system for pre-processing a digital input signal includes a digital down converter (DDC), an interpolator, and a series of down samplers. The DDC modulates the digital input signal to create a down converted signal. The interpolator re-samples the down converted signal to produce a re-sampled signal. The series of down samplers produces down sampled signals. The multiplexer selects one of the digital input signal, the down converted signal, and the down sampled signals and routes the selected signal to an output line.
    Type: Grant
    Filed: August 30, 2010
    Date of Patent: June 3, 2014
    Assignee: BAE Systems Information Solutions Inc.
    Inventors: Robert W. Lowdermilk, Dragan Vuletic, Fredric J. Harris, Michael Tammen
  • Patent number: 8718987
    Abstract: Provided is a circuit simulation model that can suitably represent capacitor characteristics, thereby realizing accurate circuit design and circuit analysis. A SPICE model is constituted of a capacitor unit in which a capacitor is replaced with a linear voltage dependent current source, a low-pass filter unit that has a function of extracting a DC bias voltage, a calculation circuit unit that is configured by combining an adder, a multiplier, and the like to perform a calculation of a circuit equation derived from an equivalent circuit for a capacitor such as an idealized C circuit model, an RC circuit model, or the like, and a linear voltage dependent voltage source that applies a total voltage applied across the capacitor to the calculation circuit.
    Type: Grant
    Filed: January 13, 2012
    Date of Patent: May 6, 2014
    Assignee: Taiyo Yuden Co., Ltd.
    Inventor: Xiangying Wu
  • Patent number: 8718961
    Abstract: A frequency measurement device includes: a counter section that counts a supplied pulse stream signal to be measured at a predetermined time interval and outputs a stream of count values corresponding to the frequency of the signal to be measured; and a low-pass filter section that performs a filtering process on the stream of count values, the low-pass filter section including moving average filters in multiple stages, and an output of at least one moving average filter among the moving average filters in multiple stages is downsampled.
    Type: Grant
    Filed: October 1, 2010
    Date of Patent: May 6, 2014
    Assignee: Seiko Epson Corporation
    Inventor: Masayoshi Todorokihara
  • Patent number: 8712693
    Abstract: A method for measuring an enhanced electromagnetic field response, especially in a submarine environment, for the purposes of subsurface data acquisition and processing. An electromagnetic field is applied to subterranean strata at two or more different frequencies, a response at each frequency is detected, and the responses at different frequencies are resolved. The differences in the phase and/or amplitude of the responses are analyzed and the nature of the strata is determined. The same method can be used to determine the hydrocarbon content of a reservoir via the use of a borehole.
    Type: Grant
    Filed: September 15, 2009
    Date of Patent: April 29, 2014
    Assignee: Electromagnetic Geoservices ASA
    Inventor: Frank Agnar Maao
  • Patent number: 8694274
    Abstract: In summary, the invention relates to a device, a system, a method and a computer program for spectrum sensing. A detection procedure for detecting a signal of interest or an event by using a plurality of sensing devices capable of communicating with a central unit is proposed. The sensing devices can compute soft detection metrics and communicate this information to a central unit, where the information may be used to make a final detection decision using a certain specified rule. The signaling overhead of the proposed approach can be of the same order as that of a hard signaling approach. However, the proposed approach may achieve a better detection performance.
    Type: Grant
    Filed: March 12, 2009
    Date of Patent: April 8, 2014
    Assignees: Koninklijke Philips N.V., NXP Semiconductor Netherlands B.V.
    Inventors: Ashish Vijay Pandharipande, Hongming Yang, Johan Paul Marie Gerard Linnartz
  • Patent number: 8676526
    Abstract: Meter electronics (20) for processing sensor signals in a flow meter and for computing mass flow rate, density or volume flow rate includes an interface (201) for receiving a first sensor signal and a second sensor signal and a processing system (203) in communication with the interface (201) and configured to generate a ninety degree phase shift from the first sensor signal with a Hilbert transform and compute a phase difference from the ninety degree phase shift, the first sensor signal and the second sensor signal. A frequency is computed from the first sensor signal and the ninety degree phase shift. A second ninety degree phase shift can be generated from the second sensor signal.
    Type: Grant
    Filed: December 5, 2005
    Date of Patent: March 18, 2014
    Assignee: Micro Motion, Inc.
    Inventors: Mark James Bell, Richard L. Maginnis, Craig B. McAnally