| Patents for G01R 23 - Arrangements for measuring frequencies; Arrangements for analysing frequency spectra (7,503) |
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| 01/09/2013 | CN202661548U USB interface frequency discrimination characteristic test data acquisition system based on spectrum analyzer platform |
| 01/09/2013 | CN102866296A Method and system for evaluating non-linear distortion, method and system for adjusting parameters |
| 01/09/2013 | CN102866295A Electrical signal sensing system |
| 01/09/2013 | CN102866294A Signal compatibility testing method based on rail circuit |
| 01/09/2013 | CN102866293A Oscillation frequency deviation detecting method and oscillation frequency deviation detecting circuit |
| 01/09/2013 | CN101915874B Harmonic wave detection method based on Fourier transformation |
| 01/09/2013 | CN101881796B Frequency counting module and counting method and application |
| 01/09/2013 | CN101825660B High-efficiency measurement method for sinusoidal signal frequency in undersampling and implementation device |
| 01/08/2013 | US8352204 Method of detecting system function by measuring frequency response |
| 01/08/2013 | US8352203 Digital implementation of a tracking filter |
| 01/08/2013 | US8350578 Wiring nanoscale sensors with nanomechanical resonators |
| 01/02/2013 | CN202649402U Test system capable of automatically measuring temperature feature of batch crystal oscillators |
| 01/02/2013 | CN202649361U ARM-based intelligent device for analyzing electric energy quality |
| 01/02/2013 | CN202649360U Electric energy quality and loss comprehensive monitoring system of large power rectification system |
| 01/02/2013 | CN202649315U Detection sensor for passive electronic tag resonant frequency and Q value |
| 01/02/2013 | CN202649308U EtherCAT bus based frequency detection device |
| 01/02/2013 | CN102857197A Calibration method for improving frequency accuracy of built-in remote control (RC) oscillator |
| 01/02/2013 | CN102175915B Current characteristic frequency extraction method of machine tool transmission system with immune random resonance |
| 01/02/2013 | CN102095929B Method for rapidly measuring frequency of alternating-current signals |
| 12/27/2012 | US20120326751 Frequency judgment device, voltage comparator circuit, and frequency measurement device |
| 12/27/2012 | US20120326701 Configurable Process Variation Monitoring Circuit of Die and Monitoring Method Thereof |
| 12/27/2012 | DE102012210498A1 Signalmessgerät, Signalmessverfahren und Programm Signal meter, signal measurement method and program |
| 12/26/2012 | EP2537283A1 Digital clock regenerator |
| 12/26/2012 | CN202631636U Power system harmonic measurement device based on digital signal processor (DSP) |
| 12/26/2012 | CN202631635U Radio frequency test system |
| 12/26/2012 | CN202631634U Amplifying frequency measurement circuit |
| 12/26/2012 | CN202631633U Testing pedestal |
| 12/26/2012 | CN202631611U Digital display electric measuring instrument with trend indication function |
| 12/26/2012 | CN102841252A Rapid detection and calculation method for fundamental wave and harmonic wave of direct frequency type single phase alternating current power supply |
| 12/26/2012 | CN102841251A Electric car charging station harmonic wave detection method in microgrid |
| 12/26/2012 | CN102841250A Signal measurement device and signal measurement method |
| 12/26/2012 | CN102841249A Method for evaluating frequency quality of power grid |
| 12/26/2012 | CN102841248A Detection method for weak signal with any frequency and range |
| 12/26/2012 | CN102841247A Detection method for grid frequency |
| 12/26/2012 | CN102129057B Method and device for detecting spectrum analysis length in power quality analyzer |
| 12/26/2012 | CN101661059B Quantitative analysis method of harmonic voltage transmission level of nonlinear load of user terminal and device |
| 12/25/2012 | US8340791 Process device with sampling skew |
| 12/25/2012 | US8339121 Oscillograph and signal identifying method of a serial data bus using the oscillograph |
| 12/20/2012 | WO2012171713A1 Method and measuring device for suppressing interfering signals |
| 12/20/2012 | DE102011079086A1 Verfahren und Messgerät zur Unterdrückung von Störsignalen Method and instrument for the suppression of interfering signals |
| 12/19/2012 | CN202614848U Indicator-type direct current milliammeter frequency meter |
| 12/19/2012 | CN102831621A Video significance processing method based on spectral analysis |
| 12/19/2012 | CN102830282A 2560-point grouping 2-based rapid fast Fourier transform method |
| 12/13/2012 | WO2012168228A1 Measuring device and method for measuring a signal having several partial signals |
| 12/13/2012 | WO2012167747A1 Device and method for alternating current physical quantity measurement and data collection |
| 12/13/2012 | US20120313715 Reference-Less Frequency Detector |
| 12/12/2012 | CN102818930A Method for quickly calculating power harmonic parameters in high-accuracy mode |
| 12/12/2012 | CN102818921A Method for calculating amplitude and phase of alternating current signal based on iterative Fourier transform |
| 12/11/2012 | US8330497 Frequency monitoring systems and methods |
| 12/06/2012 | US20120310569 Methods and apparatus for measuring the fundamental frequency of a line signal |
| 12/06/2012 | US20120306475 System and method for implementing low-cost electronic gyroscopes and accelerometer |
| 12/05/2012 | CN202583764U Frequency voltage stability control system |
| 12/05/2012 | CN202583321U Data acquisition board based on frequency characteristic test of ARM electro-hydraulic servo valve |
| 12/05/2012 | CN202583320U Frequency/voltage converter |
| 12/05/2012 | CN202583297U Measurement system for frequency voltage stability control device |
| 12/05/2012 | CN102809687A Digital measurement method for alternating-current frequency |
| 12/05/2012 | CN102809686A Instantaneous frequency detection method and system for frequency sweeping source |
| 12/05/2012 | CN102809679A Method and device for sampling electric monitoring signal |
| 12/05/2012 | CN101949977B Railway frequency shift signal anti-interference method based on blind source separation |
| 12/05/2012 | CN101800539B Digital calibration techniques for segmented capacitor arrays |
| 12/04/2012 | US8326557 Detection of an abnormal signal in a compound sampled |
| 12/04/2012 | US8324882 Phase locked loop device and method thereof |
| 11/29/2012 | US20120299579 Test and measurement instrument including asynchronous time-interleaved digitizer using harmonic mixing |
| 11/28/2012 | EP2526431A1 Method and device for monitoring a frequency signal |
| 11/28/2012 | CN202563009U High-performance label test system based on digital baseband simulator |
| 11/28/2012 | CN202563008U Frequency measurement circuit |
| 11/28/2012 | CN102804884A Spectrum sensing |
| 11/28/2012 | CN102798785A Detection method for inrush current differential harmonic of transformer |
| 11/28/2012 | CN102798765A Indicator for quality factor of trigger |
| 11/28/2012 | CN102798748A Method for calculating amplitude and phase of alternating-voltage signal based on iteration Fourier transform |
| 11/28/2012 | CN101627312B Ac electric quantity measuring device |
| 11/27/2012 | US8319490 Method in connection with frequency converter |
| 11/22/2012 | WO2012156269A1 Method and device for sparse signal sensing |
| 11/21/2012 | CN102788901A High accuracy synchronous dynamic phasor measurement method |
| 11/21/2012 | CN102788900A Atomic ground state hyperfine Zeeman frequency measuring device and method |
| 11/20/2012 | US8314604 Apparatus and method for spurious-free signal range measurement for RF circuitry |
| 11/15/2012 | WO2012152818A1 Signal analysis in time and frequency |
| 11/15/2012 | US20120286825 Method and Device for Monitoring a Frequency Signal |
| 11/15/2012 | US20120286765 Identifying hearing prosthesis actuator resonance peak(s) |
| 11/15/2012 | DE102011075669A1 Signalanalyse in Zeit und Frequenz Signal analysis in time and frequency |
| 11/14/2012 | CN202533508U Intelligent time frequency signal switcher |
| 11/14/2012 | CN102103163B Method for measuring arbitrary waveform estimated based on synchronous lock phase and half-wave |
| 11/14/2012 | CN101809453B Analog to digital conversion system |
| 11/14/2012 | CN101038311B Radio monitoring apparatus and method |
| 11/13/2012 | US8311755 Sampling rate adjustment system and method |
| 11/13/2012 | US8311130 Block distortion detection method, block distortion detection apparatus, block distortion removal method, and block distortion removal apparatus |
| 11/07/2012 | CN202522625U Notch network system based on frequency automatic tracking technology |
| 11/07/2012 | CN102771077A Digital clock regenerator |
| 11/07/2012 | CN102768306A Method and device for extracting characteristic information of electromagnetic property curve |
| 11/07/2012 | CN102128981B Method for measuring pulse signal period |
| 11/07/2012 | CN101907660B Handheld device with measuring function and measuring method thereof |
| 11/07/2012 | CN101858939B Method and device for detecting harmonic signal |
| 11/07/2012 | CN101595390B Synchronous phasor measuring device and inter-bus phase angle difference measuring device employing it |
| 11/06/2012 | US8306770 Method, system and test platform for testing output of electrical device |
| 11/01/2012 | WO2012149191A1 System and method for detecting a fundamental frequency of an electric power system |
| 11/01/2012 | US20120278020 Apparatus and method for real time harmonic spectral analyzer |
| 11/01/2012 | US20120274311 System and method for detecting a fundamental frequency of an electric power system |
| 11/01/2012 | US20120274310 Element measurement circuit and method thereof |
| 11/01/2012 | US20120274309 Method for automatically setting frequency span in a spectrum analyzer |
| 10/31/2012 | EP2518518A2 Method for automatically setting frequency span in a spectrum analyzer |