| Patents for G01R 23 - Arrangements for measuring frequencies; Arrangements for analysing frequency spectra (7,503) |
|---|
| 08/17/2011 | CN101561464B Broad-band high-resolution real-time fast Fourier transform digital spectrometer |
| 08/17/2011 | CN101446605B Low-frequency oscillation monitoring method for power system |
| 08/16/2011 | US8000917 Method and system for S-parameter capture |
| 08/16/2011 | US7999625 Method and apparatus for calibrating oscillators |
| 08/16/2011 | US7999531 Phase detecting apparatus, test apparatus and adjusting method |
| 08/11/2011 | US20110193547 Method and apparatus for identifying and reducing spurious frequency components |
| 08/11/2011 | DE10039666B4 Verfahren und Vorrichtung zur Abschätzung der Frequenz und/oder der Phase eines digitalen Signals Method and apparatus for estimating the frequency and / or the phase of a digital signal |
| 08/10/2011 | EP0991951B1 A spectrum analyser |
| 08/10/2011 | CN201926709U 测量电力系统谐波的虚拟仪器 Measurement of power system harmonics virtual instrument |
| 08/10/2011 | CN201926708U 频率测量系统 Frequency Measurement System |
| 08/10/2011 | CN102148488A Circuit device |
| 08/10/2011 | CN102147429A 宽带微波功率计以及干扰信号滤除方法 Wideband microwave power meter and a method to filter out interfering signals |
| 08/10/2011 | CN101799494B Soft separation method of conducted electromagnetic interference noise based on blind signal processing technology |
| 08/09/2011 | US7994968 RF magnitude sampler for holographic radar |
| 08/03/2011 | CN201917611U 频谱分析仪 Spectrum Analyzer |
| 08/03/2011 | CN201917591U 有源电力滤波器专用谐波分析仪的外壳结构 Shell structure of the active power filter dedicated harmonic analyzer |
| 07/28/2011 | US20110184681 Authentication device for full intact wine bottles |
| 07/28/2011 | US20110184678 Automated systems and methods for characterizing light-emitting devices |
| 07/27/2011 | CN102136716A Grid frequency detection method based on phase locked loop technology |
| 07/27/2011 | CN102135570A Synchronous phasor measuring method and device for intelligent transformer substation |
| 07/27/2011 | CN102135569A Fluctuation quantity method-based user side harmonic emission level practicality estimation method |
| 07/27/2011 | CN102135568A Period detection method and phase difference detection method for alternating current signal |
| 07/27/2011 | CN102135567A Real-time frequency tracking and harmonic measuring method for AC sampling of power system |
| 07/27/2011 | CN102135566A Frequency testing system and frequency testing method |
| 07/26/2011 | US7987068 Explosive device countermeasures |
| 07/26/2011 | US7986193 Noise reduction within an electronic device using automatic frequency modulation |
| 07/21/2011 | WO2011085855A1 Method and device for monitoring a frequency signal |
| 07/21/2011 | US20110178750 Frequency spectrum analyzing apparatus |
| 07/21/2011 | DE102010004872A1 Arrangement for evaluating disturbance of pulse of digital radio system, has effective value rectifier whose rating value above pulse repetition frequency, is below rating value of quasi-peak value detector |
| 07/20/2011 | CN201903580U Random waveform measuring device based on genlocking and semiwave estimation |
| 07/20/2011 | CN102130689A Serial bit stream regular expression engine |
| 07/20/2011 | CN102129057A Method and device for detecting spectrum analysis length in power quality analyzer |
| 07/20/2011 | CN102128982A Harmonic analysis method based on windowed interpolation FFT (Fast Fourier Transform) base frequency tracking technology |
| 07/20/2011 | CN102128981A Method for measuring pulse signal period |
| 07/20/2011 | CN102128980A Method for detecting frequency at static variable-frequency starter end of pumped storage power station |
| 07/20/2011 | CN102128979A Equal-precision frequency measuring circuit and frequency measuring method thereof |
| 07/20/2011 | CN102128975A Voltage stabilization online monitoring phasor data measurement device and phasor measurement method |
| 07/20/2011 | CN101661069B Dynamic process real-time estimation method of weak observable non-PMU measuring point independent of state matrix |
| 07/19/2011 | US7983865 Power supply apparatus for operation and resonant frequency searching method |
| 07/19/2011 | US7983378 Extended multi-modulus prescaler |
| 07/19/2011 | US7982451 Sensing instrument |
| 07/19/2011 | CA2390244C Methods and apparatuses for signal analysis |
| 07/14/2011 | US20110172974 System and method for via structure measurement |
| 07/13/2011 | EP2343559A1 A method to detect clock tampering |
| 07/13/2011 | EP2342813A2 Device for detecting a change of a generator output signal of a vehicle generator |
| 07/13/2011 | CN201897621U Anti-theft tag detecting device |
| 07/13/2011 | CN201897615U Online comprehensive tester for track frequency-shifting signal |
| 07/13/2011 | CN102121953A Method for measuring power system harmonic wave based on virtual instrument |
| 07/13/2011 | CN101587145B Photon technical multi-microwave frequency component measurement scheme by using incoherent light source |
| 07/13/2011 | CN101458286B Phasor measuring set based on in situ spectroscopic analysis and applied wide domain measuring system |
| 07/12/2011 | US7979211 Electromagnetic data processing system |
| 07/12/2011 | US7977933 High voltage sensor circuit |
| 07/07/2011 | US20110166814 Electrical network analysis of a multiphase system |
| 07/07/2011 | US20110163736 Method to detect clock tampering |
| 07/07/2011 | US20110163735 System for measuring high-frequency signals with standardized power-supply and data interface |
| 07/06/2011 | CN201893606U Distribution transformer monitoring management terminal |
| 07/06/2011 | CN201892710U Monitoring system of power transformer |
| 07/06/2011 | CN102116811A Harmonic source judgment method in double bus transmission and electric energy quality monitoring system |
| 07/06/2011 | CN102116805A Signal energy judgment device and signal energy judgment method |
| 07/06/2011 | CN102116798A Power grid frequency measurement method and device |
| 07/06/2011 | CN102116797A High accuracy numerical frequency measurement method based on FPGA |
| 07/06/2011 | CN102116796A eTPU-based synchronous sampling and frequency measuring device for alternating-current signals and working method thereof |
| 07/06/2011 | CN102116757A Electrical conductivity measurement system and method for liquid |
| 06/30/2011 | US20110156694 Apparatus for feeding antenna elements and method therefor |
| 06/30/2011 | US20110156693 Operating an Integrated Circuit at a Minimum Supply Voltage |
| 06/29/2011 | EP2338066A1 Device and method for inspecting a frequency-modulated pulse generator |
| 06/29/2011 | CN201886082U Power harmonic monitoring system based on novel Fourier transformation |
| 06/29/2011 | CN201886081U Loose phase lock method-based short-term frequency stability measuring device |
| 06/29/2011 | CN201886080U Frequency testing device |
| 06/29/2011 | CN201886067U Online voltage harmonic monitoring system for wind farms |
| 06/29/2011 | CN102109562A Double-bus single-segment wiring bus differential protection automatic analyzer |
| 06/29/2011 | CN102109555A Spectrum analyzer with digital intermediate-frequency signal processing system and implementation method thereof |
| 06/29/2011 | CN102109554A Adaptive real-time detection method for subsynchronous oscillation mode of power grid |
| 06/29/2011 | CN102109553A Digital spectrum analyzer and method for fast positioning of measuring signals |
| 06/29/2011 | CN102109552A High-frequency and high-speed frequency testing system and method based on phase locking technique |
| 06/29/2011 | CN101609112B Node phase relation identification method of electric system based on wide area measurement noise signal |
| 06/29/2011 | CN101526566B Interference signal source monitoring method and device thereof |
| 06/28/2011 | US7970061 Block distortion detection method, block distortion detection apparatus, block distortion removal method, and block distortion removal apparatus |
| 06/23/2011 | US20110153247 Method and Device for Determining a Frequency Mask for a Frequency Spectrum |
| 06/23/2011 | US20110148434 System and method for distortion analysis |
| 06/22/2011 | DE102010020910A1 Verfahren und Vorrichtung zur Ermittlung einer Frequenzmaske für ein Frequenzspektrum Method and apparatus for determining a frequency of a frequency spectrum mask for |
| 06/22/2011 | DE10009039B4 Taktperioden-Erfassungsschaltung Clock period detection circuit |
| 06/22/2011 | CN201876495U Power harmonic intelligent detecting device |
| 06/22/2011 | CN201876494U Electric energy metering and measuring system |
| 06/22/2011 | CN102104184A NFC antenna aided design system and NFC antenna aided design method |
| 06/22/2011 | CN102103163A Method for measuring arbitrary waveform estimated based on synchronous lock phase and half-wave |
| 06/22/2011 | CN101268376B An apparatus and method for multi-phase digital sampling |
| 06/21/2011 | US7966140 Radio frequency power meter |
| 06/21/2011 | US7966108 Method of checking the operating characteristics of an electronic unit designed for a wheel of a vehicle |
| 06/16/2011 | WO2011071760A2 Method and apparatus for measuring the phase change of a sound wave propagating through a conduit |
| 06/16/2011 | US20110140740 Device and method for testing a frequency-modulated clock generator |
| 06/15/2011 | CN201867451U Output detection and analysis system for switching power supply |
| 06/15/2011 | CN102095930A Method for identifying external automatic signal of preselector-free frequency spectrograph under external mixing mode |
| 06/15/2011 | CN102095929A Method for rapidly measuring frequency of alternating-current signals |
| 06/15/2011 | CN102095928A Frequency meter |
| 06/15/2011 | CN102095917A Test method for current noise of high-resistance device and medium material |
| 06/15/2011 | CN101713795B Method of digitalized measuring frequency in restriction of sampling rate |
| 06/15/2011 | CN101655520B Method for extracting lightning strike signals and transient harmonic signals in power system |
| 06/09/2011 | US20110134964 Frequency synthesizer and configuration for an enhanced frequency-hopping rate |
| 06/08/2011 | CN201859178U Metering device for harmonic electric energy |