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| Number | Title | Issue Date |
| 8185334 | Methods and systems for filtering a digital signal Aspects of the present invention are related to systems and methods for removing spikes and/or speckle noise from a digital signal. In some embodiments of the present invention, an input signal is filtered according to a first low pass filter. The low pass filtered ... | 05/22/2012 |
| 8175828 | Evaluation apparatus, evaluation method, program, recording medium and electronic device Provided is an evaluation apparatus that evaluates a characteristic of a propagation apparatus propagating a signal, comprising an output signal measuring section that measures a probability density function expressing a probability density distribution of jitter of... | 05/08/2012 |
| 8175829 | Analyzer for signal anomalies A signal analyzer includes a divergence detector for detecting periodic interference in a signal, an information detector for detecting a random event in the signal, and output circuitry for providing compensation for the periodic interference and the random event. | 05/08/2012 |
| 8155906 | Method and system for curve quality control A method of analysis wherein molecular interactions at one or more sensing surface areas are detected and respective response curves representing the progress of each interaction with time are produced, and wherein a resulting set of response curves is subjected to ... | 04/10/2012 |
| 8121803 | Communication channel calibration using feedback A method for calibrating a communication channel coupling first and second components includes transmitting a data signal from the first component to the second component on the communication channel, and sensing a characteristic, such as phase, of the data signal o... | 02/21/2012 |
| 8060326 | Measuring apparatus, measuring method and test apparatus Provided is a measurement apparatus including a first timing detecting section that detects first change timings of a signal under measurement, a second timing detecting section that detects second change timings of the signal under measurement, a buffer section tha... | 11/15/2011 |
| 8027796 | S/N ratio measuring method in eddy current testing on internal surface of pipe or tube A method in accordance with the present invention includes the steps of: separating an eddy current signal into an X-axis component and a Y-axis component to obtain signal waveform data of the respective components; excluding predetermined low-frequency components r... | 09/27/2011 |
| 8024142 | Method and system for analyzing signal waveforms A method and system for analyzing a signal waveform that comprises digitally sampling a signal at a periodic sampling interval, and accumulating a count of samples of the signal at a given logic level relative to a threshold value over a given period. The threshold ... | 09/20/2011 |
| 8000916 | System and method for evaluating high frequency time domain in embedded device probing A system and associated method for evaluating a high-frequency signal at a point of interest on a signal path from a remote signal at a remote pickup point on the signal path. The point of interest is located on a device under test that is coupled to test equipment ... | 08/16/2011 |
| 7996168 | Method and apparatus for time vernier calibration Disclosed is a method and apparatus for calibrating a time vernier in an automatic test equipment (ATE) system, the method including generating a data signal and a reference signal whose periods differ by a small amount (dt), using precession of the data signal and ... | 08/09/2011 |
| 7974799 | Backboard transmission method, backboard transmission apparatus, and substrate unit A substrate unit and other substrate unit are mounted with integrated circuits and are connected to a backboard via respective connectors. The substrate unit monitors a signal wave passed between the substrate unit and other substrate unit and detects a delay time a... | 07/05/2011 |
| 7970565 | Measuring device, test device, electronic device, program, and recording medium A measurement apparatus that measures a signal under measurement, including a strobe timing generator that sequentially generates strobes arranged at substantially even time intervals, a level comparing section that detects a signal level of the signal under measure... | 06/28/2011 |
| 7957924 | 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 out... | 06/07/2011 |
| 7957923 | Device for jitter measurement and method thereof The device for jitter measurement and a method thereof are provided. The device for jitter measure includes a signal retrieving module, a signal amplifying module, an edge detecting module, and a time-to-digital converting module. The signal retrieving module receiv... | 06/07/2011 |
| 7945404 | Clock jitter measurement circuit and integrated circuit having the same Provided is a measurement circuit for measuring a jitter of a clock signal. Delay elements delay the clock signal into delayed clock signal. Latches latch the delayed clock signals to indicate whether transition edges of the clock signal is within a window value whi... | 05/17/2011 |
| 7945405 | Jitter measurement apparatus, jitter measurement method, recording media, communication system and test apparatus Provided is a jitter measurement apparatus, including a sampling section that samples a signal 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 s... | 05/17/2011 |
| 7941287 | Periodic jitter (PJ) measurement methodology Methodologies are disclosed for analyzing periodic jitter is a signal pattern using a continuous time interval analyzer. Sampled signal patterns may be correlated using time interval error calculations to determine start and stop sequences within sampled blocks of s... | 05/10/2011 |
| 7933726 | Method and apparatus for a real time signal integrity oscilloscope A system, method, and apparatus for obtaining a record of logic level transitions within a signal, and for accurately determining a voltage-time pair exhibited by the signal. To achieve these ends, a front-end device may be mated to a real-time sampling system, such... | 04/26/2011 |
| 7933727 | Method and device for interference suppression in electromagnetic multi-channel measurement The present invention recognises and eliminates from a biomagnetic measurement signal interferences whose source is disposed in the direct vicinity of an object being measured. The invention utilises the SSS method that can be used to separate from one another the s... | 04/26/2011 |
| 7930120 | System and circuit for determining data signal jitter via asynchronous sampling A system and circuit for determining data signal jitter via asynchronous sampling provides a low cost and production-integrable mechanism for measuring data signal jitter. The data signal is edge-detected and sampled by a sampling clock of unrelated frequency the sa... | 04/19/2011 |
| 7917319 | Systems and methods for testing and diagnosing delay faults and for parametric testing in digital circuits Delay-fault testing and parametric analysis systems and methods utilizing one or more variable delay time-base generators. In embodiments of the delay-fault testing systems, short-delay logic paths are provided with additional scan-chain memory elements and logic th... | 03/29/2011 |
| 7917320 | Digital signal processing in optical systems used for ranging applications Methods and apparatuses for reducing the response time along with increasing the probability of ranging of optical rangefinders that digitize the signal waveforms obtained from the pulse echoes returned from various types of objects to be ranged, the pulse echoes be... | 03/29/2011 |
| 7899632 | Method and apparatus for anti-islanding of distributed power generation systems A method and apparatus for anti-islanding of distributed power generation systems having an inverter comprising a phase locked loop (PLL), a phase shift generator for injecting a phase shift into the PLL during at least one sample period, and a phase error signature... | 03/01/2011 |
| 7895007 | Digital signal processing in optical systems used for ranging applications Methods and apparatuses for reducing the response time along with increasing the probability of ranging of optical rangefinders that digitize the signal waveforms obtained from the pulse echoes returned from various types of objects to be ranged, the pulse echoes be... | 02/22/2011 |
| 7895006 | System and method for determining signal-to-noise ratio (SNR), signal-to-noise and distortion ratio (SINAD) and total harmonic distortion (THD) A system for determining signal-to-noise ratio (SNR), signal-to-noise and distortion ratio (SINAD), and total harmonic distortion (THD), includes logic for estimating a frequency of a dominant sinusoidal signal present in a sampled data record, logic for iteratively... | 02/22/2011 |
| 7885775 | Processing of a signal representing radiation The invention proposes a method of processing a noisy digital time signal yk corresponding to an initial time signal xt after having been conditioned by a conditioning chain, the said initial signal xt representing information about ... | 02/08/2011 |
| 7865322 | Relative noise Relative noise is a single scalar value that is used to predict the maximum value of the expected noise at any point and is calculated from the measured signal and a mathematical noise model. The mathematical noise model is selected or estimated from an observation ... | 01/04/2011 |
| 7860674 | Method and system for secure digital triggering for an oscilloscope An approach is provided for digital triggering a recording of one or more digitized signals on a digital oscilloscope by means of carrying out a level comparison for determining a triggering instant in each case between two successive sample values of a reference si... | 12/28/2010 |
| 7809516 | Probability density function separating apparatus, probability density function separating method, program, testing apparatus, bit error rate measuring apparatus, electronic device, and jitter transfer function measuring apparatus There is provided a probability density function separating apparatus that separates a predetermined component in a given probability density function. The probability density function separating apparatus includes a domain transforming section that is supplied with... | 10/05/2010 |
| 7805267 | Apparatus, method and program for verification of transmission margin The present invention relates to verification of a transmission margin of various transmission lines transmitting a signal such as a high-speed digital signal and ensures improved verification accuracy. A transmission margin verification apparatus according to the p... | 09/28/2010 |
| 7756654 | Test apparatus A test apparatus for testing a device under test includes a multi-strobe generating section that generates a plurality of strobe signals with different phases in each of cycles of an output signal output from the device under test, a plurality of timing comparing se... | 07/13/2010 |
| 7751996 | Measurement system for determining desired/undesired ratio of wireless video signals A D/U ratio is measured for desired and undesired signals in a wireless video transmission system at a shared channel frequency based on a received signal at a geographic location in proximity to regions within respective service areas for the desired and undesired ... | 07/06/2010 |
| 7747403 | Method for measuring the phase jitter of a high-frequency signal and a measuring device for the implementation of this method In order to measure the phase jitter of a high-frequency signal, a spectrum analyzer is used. The high-frequency signal (HF) to be measured is either multiplied by M and/or the output frequency of the variable frequency oscillator of the spectrum analyzer is divided... | 06/29/2010 |
| 7734434 | High speed digital waveform identification using higher order statistical signal processing In some embodiments an apparatus includes a higher order statistical signal processor to process a jittered digital signal, a diagonal line average unit to identify a distinct line in a signal output from the higher order statistical signal processor, and a peak det... | 06/08/2010 |
| 7668672 | Optimizing high speed signal transmission A method and systems for automatically adjusting the parameters of signal emitter in a synchronous high-speed transmission system, is disclosed. According to the method of the invention, the quality of a high-speed received signal is analyzed for a plurality of sets... | 02/23/2010 |
| 7657388 | Quality assessment tool Non-intrusive speech quality assessment method and apparatus for storing a sequence of intercepted packets associated with a call, each packet containing speech data, and an indication of a transmission time of the packet; storing with each intercepted packet an ind... | 02/02/2010 |
| 7653500 | Sequential timebase A method and apparatus for correcting for deterministic jitter in a sequential sampling timebase. The value of a fine analog delay is held at a substantially constant nominal rate during a duration of a counting of a digital clock. A time difference between a trigge... | 01/26/2010 |
| 7640122 | Digital signal processing in optical systems used for ranging applications Methods and apparatuses for reducing the response time along with increasing the probability of ranging of optical rangefinders that digitize the signal waveforms obtained from the pulse echoes returned from various types of objects to be ranged, the pulse echoes be... | 12/29/2009 |
| 7634371 | System and method for analyzing jitter of signals The present invention provides a system and a method for analyzing jitter of various signals including measurement signals and simulation signals. The method includes the steps of: (a) obtaining a signal file; (b) identifying a type of the signal file; (c) defining ... | 12/15/2009 |
| 7630845 | Method for calculating tolerable value for fluctuation in power supply voltage and method of testing A method for calculating a tolerable value for simultaneous switching noise in an input/output circuit having a differential input supplied with a power supply voltage. The method includes providing an input/output circuit having a differential input unit with a pul... | 12/08/2009 |
