| Patents for G01R 23 - Arrangements for measuring frequencies; Arrangements for analysing frequency spectra (7,503) |
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| 03/31/2011 | US20110074390 Signal Acquisition System Having Reduced Probe Loading of a Device Under Test |
| 03/31/2011 | US20110074389 Signal Acquisition System Having Probe Cable Termination in a Signal Processing Instrument |
| 03/31/2011 | US20110074387 Method and apparatus for spectrum detection |
| 03/31/2011 | DE102009048670A1 Control device e.g. power monitoring device, for controlling power and quality of electrical network, has switching device monitoring power supply and switching power supplies during interference in energy storage mode |
| 03/30/2011 | CN201780332U Frequency meter |
| 03/30/2011 | CN201780323U Small-signal measuring instrument |
| 03/30/2011 | CN101382588B Three phase harmonic standard electric energy meter |
| 03/29/2011 | US7917795 Digital circuit to measure and/or correct duty cycles |
| 03/29/2011 | US7915962 System and method for built in self test for timing module holdover |
| 03/29/2011 | US7915884 Importation of virtual signals into electronic test equipment to facilitate testing of an electronic component |
| 03/24/2011 | WO2010144857A3 Method of detecting system function by measuring frequency response |
| 03/24/2011 | US20110068828 Method and System for Detecting Timing Characteristics in a Communications System |
| 03/23/2011 | EP2297588A1 Signal processing device and method for detecting and locating spectral shapes |
| 03/23/2011 | CN201774220U Frequency relay |
| 03/23/2011 | CN201773153U Alternating-current frequency measuring instrument |
| 03/23/2011 | CN101988935A Digital down converter-Hilbert-Huang transform based instantaneous frequency measuring method |
| 03/23/2011 | CN101452019B Clocking frequency comparing unit and method |
| 03/22/2011 | US7912661 Impedance analysis technique for frequency domain characterization of magnetoelastic sensor element by measuring steady-state vibration of element while undergoing constant sine-wave excitation |
| 03/17/2011 | US20110062994 Frequency level detecting method |
| 03/17/2011 | US20110062943 Timing detection device |
| 03/16/2011 | CN1659574B Selection of wavelengths for integrated circuit optical metrology |
| 03/16/2011 | CN101419090B Array noise signal focusing method in measurement of target noise |
| 03/15/2011 | US7908104 Plasma processing apparatus and method for detecting status of said apparatus |
| 03/15/2011 | US7907021 Two-step VCO calibration method |
| 03/10/2011 | US20110057643 Oscillograph and signal integrity test method using the oscillograph |
| 03/10/2011 | US20110057642 Test apparatus for digital modulated signal |
| 03/10/2011 | US20110057641 Method and apparatus for current measurement in phase lines |
| 03/09/2011 | EP2291892A1 Electric installation structure |
| 03/09/2011 | CN101587156B Plasma monitoring method and apparatus |
| 03/08/2011 | US7904263 Method for automatically detecting and characterizing spectral activity |
| 03/03/2011 | WO2011025817A1 Synthetic instrument unit |
| 03/03/2011 | WO2010144834A3 Method of estimating pulse response using an impedance spectrum |
| 03/03/2011 | US20110050205 Oscillograph and signal identifying method of a serial data bus using the oscillograph |
| 03/02/2011 | CN201754166U Power grid harmonic detection device based on ANN (artificial neural network) |
| 03/02/2011 | CN101982782A Chaotic frequency measuring system and method in similar micro-photon source navigation system |
| 03/02/2011 | CN101672873B Detection method of transient harmonic signals of power system based on combination of Tsallis wavelet singular entropy and FFT computation |
| 03/01/2011 | US7900098 Receiver for recovering and retiming electromagnetically coupled data |
| 02/24/2011 | WO2011021831A2 Apparatus and method for detecting a corona |
| 02/23/2011 | EP2286248A1 System for measuring high-frequency signals having standardized power supply and data interface |
| 02/23/2011 | CN101292165B Directional power detection by quadrature sampling |
| 02/22/2011 | US7894652 Prompt gamma correction for non-standard isotopes in a PET scanner |
| 02/22/2011 | US7893776 Monitoring and compensating for real time local circuit speed in an integrated circuit |
| 02/22/2011 | US7893682 For testability technique for phase detectors used in digital feedback delay locked loops |
| 02/16/2011 | EP2283574A2 Methods of calibrating a clock using multiple clock periods with a single counter and related devices and methods |
| 02/16/2011 | CN201749162U Power quality monitoring device based on virtual instrument technology |
| 02/16/2011 | CN201749153U Convenient multifunctional harmonic analyzer with GPS time-service locating function |
| 02/16/2011 | CN101975888A Power trigger with time qualified and sequential event capability |
| 02/16/2011 | CN101971726A Bean seed germinating ability measuring device based on impedance spectrum |
| 02/15/2011 | US7890280 Method and a system for determining a physical property as a function of position |
| 02/15/2011 | US7890268 De-novo sequencing of nucleic acids |
| 02/15/2011 | US7889198 Display method for signal analyzer |
| 02/15/2011 | CA2538988C System and method for characterizing a sample by low-frequency spectra |
| 02/10/2011 | US20110035161 analog signal measurement system and gamma ray detector with targeted automated gamma spectroscopy |
| 02/09/2011 | EP2282220A1 Spectrum analysis |
| 02/09/2011 | CN201740812U Power measuring circuit in multi-functional check meter |
| 02/09/2011 | CN101968510A High-resolution measuring circuit and method thereof for frequency of output signal of resonator sensor |
| 02/09/2011 | CN101382593B Method for detecting weak low frequency signal form unknown strong frequency conversion signal |
| 02/08/2011 | US7886178 Semiconductor memory apparatus |
| 02/08/2011 | US7885917 Utility monitoring and disaggregation systems and methods of use |
| 02/08/2011 | US7884619 Method and apparatus for minimizing skew between signals |
| 02/03/2011 | WO2010111451A3 Under frequency/under voltage detection in a demand response unit |
| 02/03/2011 | US20110025371 Method for detecting a fault in an induction machine |
| 02/03/2011 | US20110025297 Parameter calculating apparatus and simulation apparatus |
| 02/03/2011 | US20110025296 High Frequency Circuit Analyser |
| 02/03/2011 | DE102009031017A1 Verfahren und Vorrichtung zur Netzzustandsbeobachtung Method and apparatus for network status monitoring |
| 02/03/2011 | DE102006018574B4 Datenempfangsvorrichtung und Synchronisationssignal-Erfassungsverfahren und -Erfassungsprogramm The data receiving apparatus and synchronization signal detection method and -Erfassungsprogramm |
| 02/03/2011 | DE10105258B4 Auflösungs-Filter für einen Spektrumanalysator Resolution filter for a spectrum analyzer |
| 02/02/2011 | CN201732130U Crystal automatic frequency modulation machine testing device |
| 02/02/2011 | CN201732113U Ship electric energy quality detection device |
| 02/02/2011 | CN101963788A Method of verification strategy for bandwidth and phase of digital type power control system |
| 02/02/2011 | CN101963632A Method of making frequency domain measurements on a time domain instrument |
| 01/27/2011 | WO2011009504A1 Frequency-selective measuring device and frequency-selective measuring method |
| 01/27/2011 | WO2010096770A3 Noise suppression techniques in high precision long-term frequency/timing measurements |
| 01/27/2011 | US20110022342 Distributed spectrum sensing |
| 01/27/2011 | US20110022341 Measurement apparatus, program, recording medium, and measurement method |
| 01/27/2011 | DE102009049060A1 Verfahren und Vorrichtung zur Ermittlung von periodischen Signalanteilen Method and apparatus for determination of periodic signal components |
| 01/27/2011 | DE102009034093A1 Frequenzselektive Messvorrichtung und frequenzselektives Messverfahren Frequency-selective measurement apparatus and frequency-selective measurement method |
| 01/26/2011 | EP2278343A2 Method of making frequency domain measurements on a time domain instrument |
| 01/26/2011 | CN201725855U Antenna changeover switch based on frequency distributor and radio frequency spectrum monitoring system consisting of antenna changeover switch |
| 01/26/2011 | CN201724983U Multifunctional frequency counter integrated circuit chip |
| 01/26/2011 | CN101957401A Power-distribution electric energy comprehensive measuring apparatus and measuring method thereof |
| 01/26/2011 | CN101957400A Distribution electric energy quality analysis meter and analyzing method |
| 01/26/2011 | CN101566641B Power system transmission line parameter synchronic measurement and recording device |
| 01/26/2011 | CN101539597B Multi-target method for distinguishing radiation noises having same frequency band |
| 01/20/2011 | WO2011007972A2 System for measuring the frequency of a vibrating wire sensor using a digital counter system |
| 01/20/2011 | US20110016346 Serial bus clock frequency calibration system and method thereof |
| 01/20/2011 | US20110015886 Sensor interface system |
| 01/19/2011 | EP2275834A1 Counter, physical quantity sensor, counting method, and physical quantity measuring method |
| 01/19/2011 | CN201717671U Automatic control system preventing electric leakage, fire and harmonic pollution |
| 01/19/2011 | CN101949977A Railway frequency shift signal anti-interference device and method based on blind source separation |
| 01/18/2011 | US7873486 Spectrogram mask trigger |
| 01/18/2011 | US7872467 Miniature RF calibrator utilizing multiple power levels |
| 01/12/2011 | CN201708591U Electric energy harmonic monitoring remote alarm device of a 10-20kV transformer platform area |
| 01/12/2011 | CN101944236A Sampling value distributing characteristic based signal detecting method with compressive sensing process |
| 01/11/2011 | US7868607 Test method for frequency converters with embedded local oscillators |
| 01/11/2011 | CA2372800C Automated frequency stepping noise measurement test system |
| 01/06/2011 | US20110004430 Eddy current detection and compensation |
| 01/06/2011 | US20110001468 Frequency characteristics measuring device |
| 01/05/2011 | EP2269315A1 Method, apparatus and computer program for estimating spectrum using a folding adc |
| 01/05/2011 | CN201699604U Monitor of energy feedback inverting system of power locomotive |