| Patents for G01R 23 - Arrangements for measuring frequencies; Arrangements for analysing frequency spectra (7,503) |
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| 12/24/2014 | CN104237634A 配电网pt铁磁谐振故障诊断与消除装置 Pt distribution network fault diagnosis and elimination of ferromagnetic resonance device |
| 12/24/2014 | CN104237633A 一种频率快速测量方法 A frequency fast measurement method |
| 12/24/2014 | CN103018557B 归一化主从式谐波与间谐波实时分析方法 Normalized real-time analysis of the main harmonics and inter-harmonics from formula |
| 12/23/2014 | US8917078 Frequency measuring device and odor sensor and electronic equipment which are provided with the frequency measuring device |
| 12/18/2014 | US20140372081 Real time artifact removal |
| 12/18/2014 | US20140369087 Determining a phase and a frequency of an electric quantity of an operating electrical device |
| 12/17/2014 | CN204028226U 一种频谱分析仪 One kind of spectrum analyzer |
| 12/17/2014 | CN204028225U 电源频率检测器 Power frequency detector |
| 12/17/2014 | CN104215838A 一种智能变电站异地核相方法 An intelligent substation offsite nuclear phase method |
| 12/17/2014 | CN104215833A 电力系统频率测量方法及装置 System frequency measurement method and apparatus for power |
| 12/17/2014 | CN104215832A 一种谐振频率的检测方法、电路和集成电路 A method of detecting the resonant frequency of the circuit and IC |
| 12/17/2014 | CN102901870B 基于单片机的频率测试系统及使用上述系统的测试方法 Frequency test system based on single chip and test methods using the system |
| 12/17/2014 | CN102879642B 一种正弦信号的频率估计方法 Frequency estimation method for sinusoidal signals |
| 12/16/2014 | US8914909 Frequency measuring and control apparatus with integrated parallel synchronized oscillators |
| 12/16/2014 | US8914242 Signal processing in guided wave cutoff spectroscopy |
| 12/11/2014 | US20140361787 Apparatus for Measuring High Frequency Electromagnetic Noise in Printed Circuit Boards and Measurement Method Therefor |
| 12/10/2014 | CN204008918U 温度补偿石英晶体振荡器的室温频率测试系统 Temperature compensated crystal oscillator frequency test system at room temperature |
| 12/10/2014 | CN204008853U 一种扫频仪 One kind of scanner |
| 12/10/2014 | CN204008852U 基于dsp间谐波检测仪器 Dsp-based inter-harmonic detection equipment |
| 12/10/2014 | CN204008851U 一种基于dsp芯片的数字频率计 Dsp chip based digital frequency meter |
| 12/10/2014 | CN204008850U 一种rf测试机 One kind of rf tester |
| 12/10/2014 | CN204008849U 一种市电检测装置 One kind of mains detection device |
| 12/10/2014 | CN204008827U 电能质量在线测量仪 Power quality meter |
| 12/10/2014 | CN104204822A 边缘触发的校准 Edge triggered calibration |
| 12/10/2014 | CN104198812A 一种谐波测试工具 Harmonic testing tools |
| 12/10/2014 | CN104198811A 低频信号频率测量方法和装置 Low-frequency signal frequency measurement method and apparatus |
| 12/10/2014 | CN104198810A 系统频率响应的测量方法 Measurement system frequency response |
| 12/10/2014 | CN104198809A 一种电力系统多频率振荡的频率测量方法 A power system is multi-frequency oscillation frequency measurement method |
| 12/10/2014 | CN102998528B 动态正弦畸变信号中频率分量的提取方法及其实现装置 Extraction component dynamic frequency sinusoidal signal distortion and achieve device |
| 12/10/2014 | CN102053177B 一种有源差分电压探头 An active differential voltage probe |
| 12/09/2014 | US8907655 System and method for detecting a fundamental frequency of an electric power system |
| 12/04/2014 | US20140354344 Test and measurement instrument including asynchronous time-interleaved digitizer using harmonic mixing |
| 12/04/2014 | US20140354261 Method, circuit and integrated circuit for detecting resonance frequency |
| 12/02/2014 | US8901917 Element measurement circuit and method thereof |
| 12/02/2014 | US8901916 Detecting malicious hardware by measuring radio frequency emissions |
| 11/27/2014 | US20140350872 Transmit power measurement apparatus having programmable filter device that is set at least based on frequency response of transmit power detection path and related transmit power measurement method thereof |
| 11/27/2014 | US20140347035 Method for measuring the frequency of an electrical signal and an electrical measuring system |
| 11/25/2014 | US8898027 Method and system for a comprehensive analysis of low frequency oscillation |
| 11/18/2014 | US8892374 Identifying electrical sources of acoustic noise |
| 11/18/2014 | US8890507 Phase transient response measurements using automatic frequency estimation |
| 11/11/2014 | US8887120 Timing path slack monitoring system |
| 11/11/2014 | US8886486 Device and method for testing APD measuring device |
| 11/11/2014 | US8885027 Stereoscopic display device and control method therefor |
| 11/04/2014 | US8880369 Occupancy measurement and triggering in frequency domain bitmaps |
| 11/04/2014 | US8878557 Electrode arrangement for monitoring a bed |
| 11/04/2014 | US8878519 Differential target antenna coupling (DTAC) |
| 10/30/2014 | US20140323903 Method and device for multichannel multifrequency analysis of an object |
| 10/30/2014 | US20140320297 Alarm signal generator circuit and alarm signal generation method |
| 10/30/2014 | US20140320110 Measuring apparatus, measuring method, and measuring program |
| 10/28/2014 | US8874374 Optical turbulence sensor |
| 10/28/2014 | US8872593 On-chip R and C calibration using on-board supply bypass capacitance |
| 10/28/2014 | US8872504 Method for automatically setting frequency span in a spectrum analyzer |
| 10/28/2014 | US8870787 Ventricular shunt system and method |
| 10/23/2014 | US20140312882 Anti-Islanding Protection in Three-Phase Converters Using Grid Synchronization Small-Signal Stability |
| 10/21/2014 | US8868364 Apparatus and method for real time harmonic spectral analyzer |
| 10/21/2014 | US8866468 DF/dT trigger system and method |
| 10/16/2014 | US20140306688 Method and Apparatus for a SuperSpeed USB Bus Powered Real-Time Spectrum Analyzer |
| 10/14/2014 | US8860433 Method and system for self-contained timing and jitter measurement |
| 10/14/2014 | US8860401 Sensor system and method |
| 10/14/2014 | US8860400 Systems and methods for providing signal analysis data |
| 10/09/2014 | US20140303918 Handling resonances in a power transmission system |
| 10/07/2014 | US8854030 Method and device for frequency response measurement |
| 10/07/2014 | US8854029 System and method for space control and remote monitoring |
| 10/02/2014 | WO2014153606A1 Audio filtering with virtual sample rate increases |
| 10/02/2014 | WO2014153604A1 Audio filters utilizing sine functions |
| 10/02/2014 | US20140292305 Millimeter-wave band spectrum analysis device and analysis method |
| 10/02/2014 | DE102014103966A1 Millimeterwellenband-Spektrumanalysevorrichtung und Analyseverfahren Millimeter-wave band spectrum analyzer and analysis methods |
| 09/30/2014 | US8849587 System and method for remotely monitoring the health of a transformer |
| 09/30/2014 | US8847604 Semiconductor device with a test circuit and a reference circuit |
| 09/25/2014 | US20140286472 Semiconductor device and measurement method |
| 09/24/2014 | EP2780728A2 Shielding integrity testing for cable drop |
| 09/23/2014 | US8843336 Trigger event detection apparatus and method therefor |
| 09/23/2014 | US8843329 Measuring filling level by means of evaluating an echo curve |
| 09/23/2014 | US8841927 Touch sensing circuit |
| 09/23/2014 | US8841923 Device and method for performing remote frequency response measurements |
| 09/18/2014 | WO2014145553A1 Passive intermodulation testing using pulse stimulus |
| 09/18/2014 | WO2014144831A1 Systems, methods, and devices having databases for electronic spectrum management |
| 09/18/2014 | WO2014144694A1 Fast frequency estimator |
| 09/18/2014 | WO2014144436A1 Systems and methods for implementing s/ sstdr measurements |
| 09/18/2014 | US20140278171 Frequency Adaptive Line Voltage Filters |
| 09/18/2014 | US20140266308 Clock amplitude detection |
| 09/18/2014 | DE102013204594A1 Verfahren und System zur Ermittlung von Trainingssignalen zum Klassifizieren eines Signals A method and system for determining of training signals for classifying a signal |
| 09/15/2014 | CA2844926A1 Methods and apparatus for engine analysis using internal electrical signals |
| 09/11/2014 | US20140253094 Method for the rapid interrogation of a passive sensor, in particular of the surface acoustic waves type, and system for measuring the unique frequency of such a sensor |
| 09/09/2014 | US8831909 Step detection and step length estimation |
| 09/04/2014 | WO2014132019A1 A radar receiver and radar detection method |
| 09/04/2014 | DE112012005281T5 Eine Messmethode für Frequenz von Koeffizient eines elektrischen Versorgungssystems A method for measuring frequency coefficient of electrical power system |
| 09/03/2014 | EP2772766A2 Power line frequency detector |
| 09/02/2014 | US8825421 Digital implementation of a tracking filter |
| 09/02/2014 | US8823388 Calibration circuit and calibration method |
| 08/28/2014 | US20140239938 Line frequency detector |
| 08/27/2014 | EP2769229A1 Method and device for analysing the quality of the electrical energy in a three-phase electric network |
| 08/26/2014 | US8818746 Crack detection in thick-walled cylinders |
| 08/26/2014 | US8818745 Monitoring and analysis of power system components |
| 08/26/2014 | US8816673 Frequency extension module for microwave and millimeter wave spectrum analyzers |
| 08/26/2014 | US8816672 Systems and methods for accounting for residual passive intermodulation in passive intermodulation measuring instruments |
| 08/26/2014 | CA2666882C System and related circuits and methods for detecting and locating wireless communication device use within a geographical area or facility |
| 08/21/2014 | US20140232434 Integrated circuit device |
| 08/21/2014 | US20140232372 Measurement and modulation in real time of the electrical consumption of a plurality of electrical appliances |
| 08/21/2014 | US20140232371 Apparatus and method for detecting frequency |