| Patents for G01R 23 - Arrangements for measuring frequencies; Arrangements for analysing frequency spectra (7,503) |
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| 11/26/2008 | CN201156058Y Intelligent electric energy quality analyzer |
| 11/25/2008 | US7456626 Measurement device and method for displaying measurement result |
| 11/20/2008 | US20080288933 Method for start-up and/or reconfiguration of a programmable field-device |
| 11/20/2008 | DE3039025B3 Anordnung zur Messung der Periode eines Signals Arrangement for measuring the period of a signal |
| 11/20/2008 | DE102007046595A1 Algorithmen und Verfahren zum Abfühlen eines Spektrums # Algorithms and methods for sensing a spectrum # |
| 11/19/2008 | CN101308175A Phase spectrum analyzer |
| 11/19/2008 | CN101308174A Wavelet transform signal frequency spectrum measuring analytical method adopting variable band-width parameter |
| 11/19/2008 | CN101308173A Signal frequency component measurement method based on wavelet conversion coefficient greatest value |
| 11/18/2008 | US7454306 Frequency margin testing |
| 11/18/2008 | US7453613 Scanning type image forming apparatus having the same containing scanning mirror in a space sealed by first and second optical members and the housing, the second optical member includes five surfaces |
| 11/13/2008 | WO2008136443A1 Sine wave parameter estimation method |
| 11/13/2008 | US20080278142 Frequency characteristic measuring circuit |
| 11/12/2008 | CN101303378A Frequency domain active orthogonal vector type detection system |
| 11/12/2008 | CN100432681C AC. frequency monitoring method |
| 11/11/2008 | US7449876 Swept-frequency measurements with improved speed using synthetic instruments |
| 11/06/2008 | WO2008133679A1 Robust signal detection using correntropy |
| 11/06/2008 | US20080273165 Method and apparatus for reducing exposure to rf energy produced by portable transmitters |
| 11/05/2008 | CN101300498A Wide-bandwidth spectrum analysis of transient signals using a real-time spectrum analyzer |
| 11/05/2008 | CN101299480A Automatic trimming apparatus for microwave ceramic component semimanufacture and trimming method thereof |
| 11/04/2008 | US7446523 Integrated spectrum analyzer circuits and methods for providing on-chip diagnostics |
| 10/30/2008 | US20080265869 Switching power supply performance testing |
| 10/30/2008 | US20080265868 Measurement Of Distortion In An Amplifier |
| 10/29/2008 | CN201141893Y 电网谐波测试仪 Harmonic tester |
| 10/29/2008 | CN101297179A Meter electronics and methods for determining a phase difference between a first sensor signal and a second sensor signal of a flow meter |
| 10/29/2008 | CN101294995A Regulating instrument of vehicle silencing controller |
| 10/28/2008 | US7444250 Measuring or test device comprising interchangeable functional units |
| 10/28/2008 | US7444249 Digital power metering system for reducing spectral leakage when determining the frequencies present in a power signal |
| 10/28/2008 | US7443252 Calibration circuit and operation method for voltage-controlled oscillator |
| 10/28/2008 | US7443173 Systems and techniques for radio frequency noise cancellation |
| 10/23/2008 | WO2008126240A1 Synchronous phasor measuring device and inter-bus phase angle difference measuring device employing it |
| 10/23/2008 | US20080258707 Test Method for Frequency Converters with Embedded Local Oscillators |
| 10/23/2008 | US20080258706 Wide-Bandwidth Spectrum Analysis of Transient Signals Using a Real-Time Spectrum Analyzer |
| 10/23/2008 | CA2675010A1 Synchrophasor measuring device and inter-bus-line phase angle difference measurement unit using the same |
| 10/22/2008 | EP1982209A1 Frequency measuring broadband digital receiver |
| 10/22/2008 | CN201138357Y Alarming apparatus of water cooled heat radiating system and water cooled heat radiating alarming system |
| 10/22/2008 | CN101292165A Directional power detection by quadrature sampling |
| 10/22/2008 | CN101291059A Electricity quality analyzer oriented to digitalized electrical system and electricity quality analysis method |
| 10/22/2008 | CN101290341A Hydroelectric units primary frequency modulation performance test method |
| 10/21/2008 | US7440859 Method for determining plasma characteristics |
| 10/21/2008 | US7439748 Method and apparatus for measuring high-frequency electrical characteristics of electronic device, and method for calibrating apparatus for measuring high-frequency electrical characteristics |
| 10/21/2008 | US7439724 On-chip jitter measurement circuit |
| 10/21/2008 | US7439723 Communicating with an implanted wireless sensor |
| 10/21/2008 | US7439722 Method and device for graphically illustrating the filling of a cigarette |
| 10/16/2008 | US20080252336 Non-Contacting Interrogation of System States |
| 10/16/2008 | US20080252283 Meter Electronics and Methods for Determining a Phase Difference Between a First Sensor Signal and a Second Sensor Signal of a Flow Meter |
| 10/15/2008 | EP1979755A1 Network analyst comprising a switchable measuring bridge |
| 10/15/2008 | CN201133919Y Microwave resonance type wavemeter |
| 10/15/2008 | CN101286069A Resonant frequency identification |
| 10/15/2008 | CN101285866A Electronic soft label checking sensor |
| 10/14/2008 | US7437258 Use of I2C programmable clock generator to enable frequency variation under BMC control |
| 10/14/2008 | US7437253 Parametrically disciplined operation of a vibratory gyroscope |
| 10/09/2008 | WO2008120282A1 Ac electric quantity measuring device |
| 10/09/2008 | WO2008070644A3 Method and apparatus for implementing finite impulse response filters without the use of multipliers |
| 10/09/2008 | US20080246461 Methods and Apparatus for Testing Delay Locked Loops and Clock Skew |
| 10/08/2008 | EP1468297A4 A hybrid optical target correlator/digital processor |
| 10/07/2008 | US7432517 Pulse modifier, lithographic apparatus, and device manufacturing method |
| 10/02/2008 | WO2008077036A9 Architectures for universal or software radio |
| 10/02/2008 | US20080238555 Systems, Modules, Chips, Circuits and Methods with Delay Trim Value Updates on Power-Up |
| 10/02/2008 | US20080238405 RF measurement system incorporating a ream assembly and method of using the same |
| 10/01/2008 | EP1974225A2 Signal analyser |
| 10/01/2008 | EP1974224A2 System and method for reducing search time and increasing search accuracy during interrogation of resonant devices |
| 09/30/2008 | US7430484 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 |
| 09/30/2008 | US7429896 Frequency stability measuring apparatus |
| 09/25/2008 | WO2008114602A1 Test equipment and electronic device |
| 09/25/2008 | WO2008114328A1 Frequency measuring instrument |
| 09/25/2008 | US20080234959 Pitch Extraction with Inhibition of Harmonics and Sub-harmonics of the Fundamental Frequency |
| 09/25/2008 | US20080231254 Spectrum analyzer, spectrum analysis method and recording medium |
| 09/24/2008 | EP1972950A1 Method and measuring device for measuring emitted interference with active carrier suppression |
| 09/24/2008 | CN101271133A Detection circuit and its method for maximum operation frequency of pulse frequency modulation |
| 09/23/2008 | US7428475 Method of processing oscillatory data |
| 09/23/2008 | US7428464 Wideband signal analyzer |
| 09/23/2008 | CA2362776C Parallel correlator architecture |
| 09/18/2008 | DE102007012122A1 Verfahren und Vorrichtung zum Messen des Phasenrauschens Method and apparatus for measuring the phase noise |
| 09/17/2008 | EP1971027A1 Hand-held spectrum scanner |
| 09/17/2008 | CN101268376A An apparatus and method for multi-phase digital sampling |
| 09/17/2008 | CN101266268A Electromagnetic interference data access system and method |
| 09/16/2008 | US7426445 Measuring temperature change in an electronic biomedical implant |
| 09/11/2008 | US20080218153 Power waveform harmonic analysis using summed samples |
| 09/10/2008 | CN101261293A Electric power steady-state signal tracking measurement based on self-adapting filter |
| 09/10/2008 | CN101261292A Base wave and harmonic detection method based on fiver item Rife-Vincentú¿1ú®window double spectral line interpolation FFT |
| 09/10/2008 | CN100417947C Portable type microwave signal detector |
| 09/04/2008 | WO2008106534A1 Systems and methods for performing external correction |
| 09/04/2008 | US20080211482 Method and Apparatus for Measuring the Frequency of a Received Signal |
| 09/04/2008 | US20080211481 Handheld spectral scanner |
| 09/03/2008 | CN100416279C Method for preventing static noise error code and digital filtering in remote control toy chip |
| 09/02/2008 | US7421356 Method and apparatus for measurement of fuel cell high frequency resistance in the presence of large undesirable signals |
| 08/28/2008 | US20080208496 Device for identifying consumer devices in an electric network and process for operating the device |
| 08/28/2008 | US20080205498 Method for edge formation of signals and transmitter/receiver component for a bus system |
| 08/28/2008 | US20080203998 On-chip power supply monitor using latch delay sensor |
| 08/27/2008 | CN201107358Y Multifunctional commercial power monitor |
| 08/27/2008 | CN201107253Y Pulse period measuring circuit |
| 08/27/2008 | CN101251573A Automatic testing method for mixer third order inter-modulation distortion of radio-frequency tuner chip |
| 08/27/2008 | CN101251556A Sinusoidal signal four parameters testing method and virtual apparatus signal detection device |
| 08/27/2008 | CN101251390A Apparatus for detecting weak signal based on time-frequency transformation |
| 08/21/2008 | WO2008099035A1 Spectrum analyser based on neural networks |
| 08/21/2008 | US20080197885 Circuit for detecting maximal frequency of pulse frequency modulation and method thereof |
| 08/20/2008 | CN101246203A Amorphous alloy low-intensity magnetic field sensor |
| 08/20/2008 | CN101246189A Logarithm field analog wavelet converting circuit for electric power harmonic detection |
| 08/19/2008 | US7415401 Method for constructing 3-D geologic models by combining multiple frequency passbands |
| 08/19/2008 | US7415373 Method of measuring frequency translation device |