| Patents for G01R 23 - Arrangements for measuring frequencies; Arrangements for analysing frequency spectra (7,503) |
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| 09/05/2012 | CN202421331U Commercial power power frequency monitoring device |
| 09/05/2012 | CN202421279U Voltage and frequency measuring circuit for breaker |
| 09/05/2012 | CN102654533A Method for detecting and separating reactive power component and harmonic component |
| 09/05/2012 | CN101852826B Harmonic analysis method for power system and device thereof |
| 09/05/2012 | CN101126775B Broad band and high resolution ratio millimeter wave and sub millimeter wave signal detecting system |
| 09/04/2012 | US8258883 System and method for characterizing process variations |
| 09/04/2012 | US8258774 System and method for implementing low-cost electronic gyroscopes and accelerometer |
| 08/30/2012 | WO2012090024A9 Photon frequency measurement system and method using complimentary electro‑optical modulation |
| 08/30/2012 | US20120217952 Circuit arrangement for frequency determination |
| 08/30/2012 | DE102011012027A1 Circuit device for frequency determination of output signal of oscillator for frequency modulated radar detector, performs frequency analysis of final signal, and determines output signal using frequency of final signal |
| 08/29/2012 | CN102650658A Time-varying non-stable-signal time-frequency analyzing method |
| 08/29/2012 | CN101368992B Test system and method of video signal generator |
| 08/28/2012 | US8255179 Time qualified frequency mask trigger |
| 08/28/2012 | US8255178 Method for detecting statuses of components of semiconductor equipment and associated apparatus |
| 08/23/2012 | WO2012075123A3 System frequency response test using continuous sweep frequencies |
| 08/23/2012 | US20120212227 metal detector target discrimination in mineralized soils |
| 08/23/2012 | DE102011004572A1 Verfahren und Vorrichtung zur Messung des Phasenrausch-Spektrums eines gepulsten Sinussignals Method and apparatus for measuring phase noise spectrum of a pulsed sinusoidal signal |
| 08/22/2012 | EP2489129A1 Apparatus and method for measuring the oscillations of an oscillator |
| 08/22/2012 | CN202393829U Satellite earth station intermediate frequency signal frequency spectrum automatic monitoring analyzer |
| 08/22/2012 | CN102645584A Appending pseudo-random sub-lsb values to prevent intensity banding |
| 08/22/2012 | CN102645583A Broadband rapid frequency measuring method based on cluster period phase process |
| 08/22/2012 | CN102645582A High-accuracy frequency measurement system |
| 08/22/2012 | CN101900761B High-accuracy non-integer-period sampled harmonic analysis and measurement method |
| 08/22/2012 | CN101770587B System and method for negative testing of anti-collision capacity of RFID reader |
| 08/22/2012 | CN101762741B Monitoring and orientation system of pollution sources of electrical energy quality |
| 08/22/2012 | CN101488656B Methods for common mode voltage-based AC fault detection, verification and/or identification |
| 08/21/2012 | US8250399 Method and apparatus for clock wander compensation |
| 08/21/2012 | US8249820 Detector assembly for use in environments containing background magnetic noise and method thereof |
| 08/21/2012 | US8248106 Lock detection using a digital phase error message |
| 08/21/2012 | US8248057 Method for measuring the mains frequency, and electrical appliance that implements said method |
| 08/21/2012 | US8246794 Method of magnetron sputtering and a method for determining a power modulation compensation function for a power supply applied to a magnetron sputtering source |
| 08/15/2012 | EP2487494A1 Monitoring device for electric power grid |
| 08/15/2012 | CN102636728A Method for identifying negative damping low-frequency oscillation based on force moment decomposition method |
| 08/15/2012 | CN102636694A Single-response microwave photonic filter-based frequency measurement device and measurement method |
| 08/15/2012 | CN102636693A Harmonic analysis algorithm combining fast Fourier transform (FFT) and nonlinear least square |
| 08/15/2012 | CN102636287A Brillouin signal frequency spectrum high-speed detecting method based on LM spectral line fitting algorithm |
| 08/15/2012 | CN101755218B Apparatus and methods of defining spectral regions of interest for signal analysis |
| 08/15/2012 | CN101420226B Full digital phase locking loop |
| 08/14/2012 | US8244493 Noise reduction technique for monitoring electromagnetic signals |
| 08/14/2012 | US8244490 Power trigger with time qualified and sequential event capability |
| 08/09/2012 | WO2012104201A1 Method for measuring transmission frequencies using a rotary interferometer |
| 08/09/2012 | US20120200284 Power measurement device |
| 08/08/2012 | EP2484968A1 Recessed light fitting and method of manufacture |
| 08/08/2012 | CN202374229U Yttrium iron garnet tuned filter (YTF) drive circuit, yttrium iron garnet (YIG) filter and frequency spectrum measuring device |
| 08/08/2012 | CN202374219U Spectrum measurement device and yttrium iron garnet (YIG) tuned oscillator with sub-miniature A (SMA) interface |
| 08/08/2012 | CN202374218U Spectrum measuring device and YIG tuned oscillator with external power supply thereof |
| 08/08/2012 | CN202374217U Frequency spectrum measuring device and a YIG (Yttrium Iron Garnet) tuned oscillator adopting PCB (Printed Circuit Board) technology |
| 08/08/2012 | CN202372574U Magnet saturation frequency tester |
| 08/08/2012 | CN202372573U Frequency detection module for radio frequency charge monitoring instrument |
| 08/08/2012 | CN202372572U Visual multi-path jumping pulse measurement virtual logic analyzer |
| 08/08/2012 | CN202372543U Multichannel alternating-current electric meter |
| 08/08/2012 | CN1940579B RF autocorrelation signal trigger generator |
| 08/08/2012 | CN102628894A Selective harmonic wave extracting method |
| 08/08/2012 | CN102628893A System and method for measuring photonic integration microwave frequency |
| 08/08/2012 | CN101865951B Anti-interference frequency measuring method |
| 08/08/2012 | CN101833034B Benchmark test system and method influenced by RFID (Radio Frequency Identification Device) label medium |
| 08/07/2012 | US8237451 Communicating with an implanted wireless sensor |
| 08/02/2012 | US20120194169 dF/dT TRIGGER SYSTEM AND METHOD |
| 08/01/2012 | CN202362381U Electrical network harmonic wave measuring device and electrical network equipment |
| 08/01/2012 | CN202362380U Multifunctional high-precision digital frequency meter |
| 08/01/2012 | CN202362379U Circuit device for high-precision measurement of intermediate frequency signal |
| 08/01/2012 | CN202362345U Standard capacitance divider and induced voltage measurement device |
| 08/01/2012 | CN102621384A Frequency measuring method and frequency measuring system |
| 08/01/2012 | CN102621383A Method and system for measuring nanosecond ultra-narrow pulse |
| 08/01/2012 | CN102621382A Method for detecting frequency, phase and amplitude of electric signal in electric power system |
| 08/01/2012 | CN102621381A Automatic temperature-frequency characteristic measuring instrument for thermostatic crystal oscillators |
| 08/01/2012 | CN102621373A Signal collection device and signal processing method of current-sharing input system of alternating-current power supply |
| 07/26/2012 | US20120191393 Frequency determining circuit and semiconductor device |
| 07/25/2012 | CN102611183A Method for detecting and protecting isolated island of grid-connected power generation system |
| 07/25/2012 | CN102608522A Automatic aging parameter measuring instrument for oven controlled crystal oscillator |
| 07/25/2012 | CN102608423A Detection method of harmonic energy |
| 07/25/2012 | CN102608422A Method for computing alternating current component fundamental amplitude value in microcomputer protection |
| 07/25/2012 | CN102608421A Frequency range extender for Fourier analysis for phase noise |
| 07/25/2012 | CN102608420A ARM-based electro-hydraulic servo valve frequency characteristic test data acquisition board |
| 07/25/2012 | CN102608419A Self-adaption instantaneous frequency measuring method with noise suppression performance |
| 07/25/2012 | CN102608418A Frequency extension device and method based on dual-mixing down-conversion technology |
| 07/25/2012 | CN102608417A Millimeter wave and submillimeter wave frequency-band frequency stability measuring system and method |
| 07/25/2012 | CN102608416A Dual mixer time difference measurement system and method based on cross-correlation technology |
| 07/25/2012 | CN102608415A Software frequency tracking algorithm on basis of weighted double fitting |
| 07/25/2012 | CN101865946B Alternating current parameter testing system and method of programmable digital integrated circuit |
| 07/25/2012 | CN101420200B General speed controller for electricity generator |
| 07/24/2012 | US8229754 Selecting features of displayed audio data across time |
| 07/19/2012 | WO2012049680A4 Wideband signal analyzer |
| 07/19/2012 | US20120182026 Clock generating apparatus, test apparatus and clock generating method |
| 07/18/2012 | CN202339381U Harmonic electric energy metering system based on Nuttall self-convolution window weighed FFT (Fast Fourier Transform) |
| 07/18/2012 | CN202339380U 一种用于中频变频器的频率测量装置 IF frequency measuring device for a drive |
| 07/18/2012 | CN102590668A Method and device for detecting microwave signal types and frequency based on photon technology |
| 07/18/2012 | CN102590617A Method for realizing output of double sources of frequency spectrograph by using integrated broadband local oscillator and switch filter array |
| 07/18/2012 | CN102590616A Method for measuring insertion loss of any position of antenna housing |
| 07/18/2012 | CN102590615A Method for correcting synchronous phasor under condition of frequency shift of voltage of power grid, and current signal |
| 07/18/2012 | CN102590614A Detection system and detection method of ultrasonic frequency |
| 07/18/2012 | CN102590613A Method and device for measuring arrival time difference of radio-frequency signal |
| 07/18/2012 | CN102590612A Intelligent time frequency signal switcher |
| 07/18/2012 | CN101833594B Method and device for predicting and debugging EMI characteristics in IC system |
| 07/18/2012 | CN101680919B Determination of sine wave period |
| 07/18/2012 | CN101404546B Frequency spectrum occupancy rate measuring method based on signal moment characteristics |
| 07/17/2012 | US8224603 Frequency offset estimating apparatus and estimating method thereof |
| 07/17/2012 | US8222887 Process for measuring peak values and power of an audio frequency signal |
| 07/12/2012 | US20120176120 System and method for monitoring current drawn by a protected load in a self-powered electronic protection device |
| 07/11/2012 | CN202330603U 石英晶体器件工艺优化测试平台 Quartz devices process optimization test platform |