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| Number | Title | Issue Date |
| 8190387 | Frequency measurement apparatus The invention relates to a frequency measurement apparatus which is arranged in such a way as to obtain an amplitude, chord length and rotation phase angle of a voltage rotation vector by means of an integration method, and furthermore, obtain a change rate of the r... | 05/29/2012 |
| 8175830 | Frequency estimation of rare events by adaptive thresholding A method and system for estimating a magnitude of extremely rare events upon receiving a complete data sample and a specific exceedance probability are described. A distribution is chosen for a complete data sample. An optimal subsample fitted to the distribution is... | 05/08/2012 |
| 8170824 | System and method for determining distance with precision in the presence of multipath interference Various aspects of the present invention are shown and described, each of which has stand alone utility in a navigated medical environment. A receiver position calibration system and method facilitates calibration of a reference frame prior to each navigated procedu... | 05/01/2012 |
| 8150643 | Method of detecting system function by measuring frequency response Real-time battery impedance spectrum is acquired using a one-time record. Fast Summation Transformation (FST) is a parallel method of acquiring a real-time battery impedance spectrum using a one-time record that enables battery diagnostics. An excitation current to ... | 04/03/2012 |
| 8131490 | Methods and systems for determining a received signal frequency A system and method for determining a received signal frequency by sampling the received signal at a rate less than twice a predefined nyquist rate. The system includes a distorting component configured to distort the received signal in a frequency dependent manner,... | 03/06/2012 |
| 8126668 | Signal detection using delta spectrum entropy Disclosed is a method of signal detection. A received input signal is divided into a frame unit and each input signal present in a first frame and a second frame is transformed into a frequency signal. Then, first power spectrum information and second power spectrum... | 02/28/2012 |
| 8108165 | Acquiring phasors outside the frequency tracking range for power protective relays A system and method for acquiring phasors outside of the frequency tracking range for power protective relays. As the frequency of a power system varies from the rated frequency, phasors calculated from such samples include errors. A frequency tracking range is used... | 01/31/2012 |
| 8108164 | Determination of a common fundamental frequency of harmonic signals Techniques are provided for determining the time course of the fundamental frequency of harmonic signals, wherein the input signal is split into different frequency channels by band pass filters. Distances between crossings of different orders are determined, and a ... | 01/31/2012 |
| 8032319 | Methods for analyzing streaming composite waveforms Methods for signal processing employ instantaneous frequency analysis through quadrature genometric measurement of streaming signal data. Such methods may include the analysis of any composite analog periodic signal, including but not limited to audio, video, radio,... | 10/04/2011 |
| 8024143 | Method for ascertaining a mains frequency in a voltage signal, and mains analyzer A method for ascertaining a mains frequency from a voltage signal which has a particularly high proportion of harmonics includes stipulating a sample frequency for a sample collection, polling a voltage signal at equidistant times during periods of the sample oscill... | 09/20/2011 |
| 8000917 | Method and system for S-parameter capture A periodic broadband signal can be used to determine the S21 measurement for a channel by stimulating the channel across a spectrum of interest. The channel response to such broadband signal can be measured from undersampled data captured at the receiver.... | 08/16/2011 |
| 7996169 | Method and apparatus for compensating S-parameters of passive circuits The invention related to a method and circuit that is used to compensate for S-parameters of a passive circuit which do not satisfy passivity. The method includes the following steps: (1) getting S-parameters which do not satisfy passivity, these S-parameters being ... | 08/09/2011 |
| 7983865 | Power supply apparatus for operation and resonant frequency searching method A power supply apparatus for operation supplies a drive signal of a resonant frequency to a surgical instrument to drive the instrument. A recognition section recognizes a surgical instrument connected to the power supply apparatus. A setting section sets a frequenc... | 07/19/2011 |
| 7945407 | Signal analyzers and frequency domain data production methods Sets of time domain data of respective frequency bands from Fd-1 to Fd-n of a periodic input signal Fs are acquired. Sets of the time domain data of the common frequency band are extracted from the sets of the time domain data of the frequency bands Fd-1 | 05/17/2011 |
| 7937231 | Order tracking method and system The present invention describes an order tracking system (200) and method (100) for tracking at least one order from mechanical and/or acoustic vibrations generated by a periodic excitation process of a physical system. The order tracking system (20... | 05/03/2011 |
| 7908103 | System and methods for determining masking signals for applying empirical mode decomposition (EMD) and for demodulating intrinsic mode functions obtained from application of EMD A computer-implemented method of signal processing is provided. The method includes generating one or more masking signals based upon a computed Fourier transform of a received signal. The method further includes determining one or more intrinsic mode functions (IMF... | 03/15/2011 |
| 7899633 | Sensing apparatus An object of the present invention is to provide a sensing instrument capable to detect a substance existing in a very small quantity, such as environmental pollutants, instantly with a high degree of precision. As a specific means for solving the problem, a frequen... | 03/01/2011 |
| 7890280 | Method and a system for determining a physical property as a function of position A method and system for determining a physical property as a function of position. A data series including data point from one or more channels is obtained by frequency modulation continuous wave. A number of data points correspond to Nda different values of frequen... | 02/15/2011 |
| 7853419 | Signal processing circuit and method for processing an HF input signal A signal processing circuit and a method for processing an HF input signal are described, having an HF receiver for generating an IF signal on an intermediate frequency from an HF input signal, a frequency divider for generating a signal from the IF signal or a sign... | 12/14/2010 |
| 7778785 | Signal-to-noise ratio measurement for discrete waveform There is provided a measuring apparatus for measuring a signal-to-noise ratio of a discrete waveform which is output from an AD converter in response to an input signal, where the signal-to-noise ratio indicates a ratio of a signal component of the input signal to n... | 08/17/2010 |
| 7769553 | Method for compensating electromagnetic data Method for compensating for phase errors in electromagnetic data by exploiting the frequency scaling properties of electromagnetic fields. The data are obtained at various source-receiver offsets. Then, temporal frequency components of the data at each offset R are ... | 08/03/2010 |
| 7742887 | Identifying process and temperature of silicon chips Systems and techniques are disclosed relating to communications. The systems and techniques include determining the temperature and process speed of chips used in communications devices. The systems and techniques include measuring the output of ring oscillators emb... | 06/22/2010 |
| 7725277 | Method and device for performing a frequency analysis of an AC voltage signal, in particular on a power grid In a method for performing a frequency analysis of an AC voltage signal, in particular in a power mains, an upper limit of the period length of a fundamental oscillation in the AC voltage signal is determined. A sequence of sampling values of the AC voltage signal i... | 05/25/2010 |
| 7680614 | Method for determining the humidity and density of a dielectric material The invention relates to a method for determining the humidity and/or density of a dielectric material in a resonator that is filled with said material and that contains a transmitter and a receiver. According to said method: the transmitter emits a signal; a resona... | 03/16/2010 |
| 7668673 | Data watermarks created by using an uneven sampling period Input signals are electronically watermarked using an uneven or non-uniform sampling rate. The uneven or non-uniform sampling may be pseudo-random. The uneven or non-uniform sampling meets the Nyquist criterion so that aliasing and loss of content are avoided. The r... | 02/23/2010 |
| 7653501 | Apparatus for determining diameter of parabolic antenna and method therefor Provided are an apparatus and method for determining a diameter of a reflector antenna. The apparatus includes a setting unit for setting up electrical characteristic values of the reflector antenna upon receipt thereof from outside, a parameter input unit for recei... | 01/26/2010 |
| 7647192 | Active removal of aliasing frequencies in a decimating structure by changing a decimation ratio in time and space When a sample stream is decimated, frequency components from outside of a desired frequency band are aliased into the desired band, causing interference and loss of information. Different decimating ratios result in different frequencies aliasing into the desired fr... | 01/12/2010 |
| 7620510 | Pulsed ring oscillator circuit for storage cell read timing evaluation A pulsed ring oscillator circuit for storage cell read timing evaluation provides read strength information. A pulse generator is coupled to a bitline to which the storage cell to be measured is connected. The storage cell thereby forms part of the ring oscillator a... | 11/17/2009 |
| 7620509 | Detection of time-frequency codes using a spectrogram A frequency hopping pattern of a frequency hopping signal is detected by use of spectrogram-generating software in a digital storage oscilloscope. By using a spectrogram, a hopping pattern can be determined without having to demodulate the signal, recover the phase ... | 11/17/2009 |
| 7620508 | Terahertz detection using a multi-mode signal A technique for generating and detecting an EM signal in the THz range involves generating EM energy having multiple modes, selecting at least two of the modes of the EM energy to provide a multi-mode EM signal, subjecting the multi-mode EM signal to mixing, and iso... | 11/17/2009 |
| 7574312 | Semiconductor device and communications terminal and automobile having the same A semiconductor device is disclosed in which resistance to the influence of external noise on internal power source network is improved. A semiconductor device operating at any predetermined frequency among a plurality thereof, and having power source networks for s... | 08/11/2009 |
| 7567877 | System and method for computing the frequency of a low frequency wave The present invention provides a system for computing the frequency of a low frequency wave. The system includes: a wave producer (3) configured for sending out a first wave with a high frequency; a device (4) configured for sending out a second wave w... | 07/28/2009 |
| 7552018 | Method for quickly quantifying the resistance of a thin film as a function of frequency The present invention provides a baseline function, viz., a transmission-related parameter (transmission loss, transmission coefficient, etc.) as a function of resistance of a uniformly resistant finitely thin film—which is predicated on the theoretical behavior o... | 06/23/2009 |
| 7474972 | Bandwidth multiplication for a test and measurement instrument using non-periodic functions for mixing An acquisition apparatus for a test and measurement instrument including a splitter configured to split an input signal into a plurality of split signals, a plurality of oscillators, each oscillator configured to generate a periodic signal, a plurality of combiners,... | 01/06/2009 |
| 7444249 | Digital power metering system for reducing spectral leakage when determining the frequencies present in a power signal A digital power metering system reduces spectral leakage when determining the frequencies present in a power signal by a technique that includes sampling the signal and performing a transformation from the time domain to the frequency domain. The system initially me... | 10/28/2008 |
| 7437272 | Systems and methods for self-synchronized digital sampling Systems and methods for self-synchronized data sampling are provided. In one embodiment, a system for capturing synchronous data samples is provided. The system includes an analog to digital converter adapted to capture signals from one or more sensors and convert t... | 10/14/2008 |
| 7437253 | Parametrically disciplined operation of a vibratory gyroscope Parametrically disciplined operation of a symmetric nearly degenerate mode vibratory gyroscope is disclosed. A parametrically-disciplined inertial wave gyroscope having a natural oscillation frequency in the neighborhood of a sub-harmonic of an external stable clock... | 10/14/2008 |
| 7430484 | Signal processing method and apparatus for use in real-time subnanometer scale position measurements with the aid of probing sensors and beams scanning periodically undulating surfaces such as gratings and diffraction patterns generated thereby, and the like An improved signal processing method and apparatus are presented for use in real-time sub-nanometer scale position measurements with the aid of probing sensors and/or beams scanning periodically undulating surfaces such as a grating and diffraction patterns generate... | 09/30/2008 |
| 7428464 | Wideband signal analyzer A wideband signal analyzer has a plurality of frequency conversion paths for simultaneously processing different contiguous frequency bands of an input signal. Each frequency conversion path provides time domain data for input to a digital signal processor. The digi... | 09/23/2008 |
| 7426445 | Measuring temperature change in an electronic biomedical implant The change in temperature of an implanted electronic device can be determined by providing power to one or more circuit elements included in the implanted electronic device, wherein the circuit elements comprise a non-crystal oscillator. A shift in the output freque... | 09/16/2008 |
