| Patents for G01R 23 - Arrangements for measuring frequencies; Arrangements for analysing frequency spectra (7,503) |
|---|
| 06/08/2011 | CN201859177U Measurement module for low-frequency alternating current signal in relay protection device |
| 06/08/2011 | CN1906494B Dual signal RF power level detector |
| 06/08/2011 | CN102087314A Power grid harmonic analyzer based on virtual instrument |
| 06/08/2011 | CN102087313A Frequency estimation method for satellite search and rescue signal |
| 06/08/2011 | CN102087308A Electric quantity acquisition and test analyzer and method for power system |
| 06/07/2011 | US7957938 Method and apparatus for a high bandwidth oscilloscope utilizing multiple channel digital bandwidth interleaving |
| 06/03/2011 | WO2011021831A3 Apparatus and method for detecting a corona |
| 06/02/2011 | US20110130993 Digital implementation of a tracking filter |
| 06/02/2011 | US20110127990 Frequency responsive bus coding |
| 06/01/2011 | CN201854233U Detection device for frequency and voltage at end of static frequency-conversion starter of pumped-storage power station |
| 05/31/2011 | US7952344 Frequency characteristic measuring apparatus |
| 05/26/2011 | WO2011063328A2 Logarithmic mean-square power detector |
| 05/26/2011 | US20110125438 Signal analyzer for analyzing dynamic behavior of a target system |
| 05/25/2011 | CN102073055A Method for testing fixed offset of temperature compensated crystal oscillator in GPS (Global Positioning System) receiver |
| 05/24/2011 | US7949495 Process variable transmitter with diagnostics |
| 05/24/2011 | US7948326 Method for carrying out a frequency change |
| 05/24/2011 | US7948236 Adaptive multichannel locator system for multiple proximity detection |
| 05/19/2011 | US20110115467 Film-thickness measuring device using pll circuit |
| 05/18/2011 | CN1996986B Full phase time shift phase difference spectrum correction method |
| 05/18/2011 | CN102067399A Electric installation structure |
| 05/18/2011 | CN102065628A Technology for accurately measuring half-unit cavity frequency of dumbbell cavity |
| 05/18/2011 | CN102065316A Automatic set top box level test device and method |
| 05/18/2011 | CN102062817A Frequency offset detection method and device for crystal oscillator of electronic product |
| 05/18/2011 | CN102062805A Parameter detector of gas turbine generator set |
| 05/18/2011 | CN101718816B Fundamental wave and harmonic wave detection method based on four-item coefficient Nuttall window interpolation FFT |
| 05/18/2011 | CN101701984B Fundamental wave and harmonic wave detecting method based on three-coefficient Nuttall windowed interpolation FFT |
| 05/18/2011 | CN101701982B Method for detecting harmonic waves of electric system based on window and interpolated FFT |
| 05/18/2011 | CN101692107B Method for producing high-speed frequency measurement chip |
| 05/18/2011 | CN101377909B Timing controllers and driving ability control methods |
| 05/18/2011 | CN101241150B Apparatus, method for processing signal and method for generating signal |
| 05/17/2011 | US7945407 Signal analyzers and frequency domain data production methods |
| 05/17/2011 | US7945404 Clock jitter measurement circuit and integrated circuit having the same |
| 05/17/2011 | US7944315 Programmable voltage-controlled oscillator |
| 05/12/2011 | US20110107851 Method and device for controlling the quality, in particular the stiffness and the phase, of a hydro-elastic joint |
| 05/11/2011 | EP2318849A1 Digital oscilloscope module with glitch detection |
| 05/11/2011 | CN201830147U Output frequency stabilization device of variable frequency power source |
| 05/11/2011 | CN102057533A Radio frequency transponder |
| 05/11/2011 | CN102055699A Demodulation method for frequency shift keying and device for realizing same |
| 05/11/2011 | CN102053647A Device for adjusting power consumption and method thereof |
| 05/11/2011 | CN102053177A Active differential voltage probe |
| 05/10/2011 | US7940008 Inductively-coupled RF power source |
| 05/05/2011 | WO2010049305A3 Device for detecting a change of a generator output signal of a vehicle generator |
| 05/05/2011 | US20110106499 Method for detecting statuses of components of semiconductor equipment and associated apparatus |
| 05/05/2011 | US20110106472 Spectrometric measurement apparatus, image evaluation apparatus, and image forming apparatus |
| 05/05/2011 | US20110101957 Method for Reconstructing Sparse Signals from Distorted Measurements |
| 05/04/2011 | EP2173242B1 Method and apparatus for measuring breathing rate |
| 05/04/2011 | CN102047561A Methods of calibrating a clock using multiple clock periods with a single counter and related devices and methods |
| 05/04/2011 | CN102043090A Measurement system for frequency-shift signal parameter of track circuit |
| 05/04/2011 | CN102043070A Amplitude-modulated dynamometric gradometer for feeding back fixed amplitudes as well as scanning force microscopy and frequency measurement instrument |
| 05/04/2011 | CN101408586B On-line low-frequency oscillation detection and node coherence grouping method based on experience modal decomposition |
| 05/03/2011 | US7936162 Measured-signal repetition frequency detection method, and sampling apparatus and waveform observation system using the method |
| 04/28/2011 | US20110095748 Differential target antenna coupling (dtac) |
| 04/28/2011 | US20110095747 Method and device for fast measurement of frequency response with scalable short chirp signals |
| 04/28/2011 | DE19516449B4 Verfahren zum Bestimmen der Frequenzabweichung A method for determining the frequency deviation |
| 04/27/2011 | EP2315091A2 Systems, methods, and devices for providing pulses to a motion device |
| 04/27/2011 | CN201812154U Frequency detection module of satellite synchronous clock device |
| 04/27/2011 | CN201811995U Frequency measuring instrument |
| 04/27/2011 | CN102035554A System and method for metering and analyzing electric energy as well as analog-to-digital conversion circuit |
| 04/27/2011 | CN102033164A Method and system for calculating sequence of fundamental component sampled signals of electric signals |
| 04/27/2011 | CN102033163A Frequency measurement method, frequency measurement device and apparatus equipped with frequency measurement device |
| 04/27/2011 | CN102033162A Signal generation circuit, frequency measurement device including the signal generation circuit, and signal generation method |
| 04/27/2011 | CN102033161A Frequency measuring method of alternating current signal |
| 04/27/2011 | CN102033160A Silicon wafer-level frequency testing method |
| 04/27/2011 | CN101587146B Parameter detection method for harmonic wave and indirect harmonic wave |
| 04/27/2011 | CN101509942B Ultrasonic transducer frequency response characteristic detecting method |
| 04/26/2011 | US7932751 Frequency mode selection discriminator and low pass filter |
| 04/26/2011 | US7932732 Preventing a false lock in a phase lock loop |
| 04/20/2011 | CN102024314A Method and device for replacing rotating platform signal slip ring |
| 04/20/2011 | CN101701985B Constant-frequency variable dot power grid harmonic wave detection method and admeasuring apparatus thereof |
| 04/20/2011 | CN101465545B Detection method for hyposynchronous resonance of series complement system |
| 04/20/2011 | CN101424714B Electric power frequency measurement method based on big dipper satellite and apparatus |
| 04/20/2011 | CN101300498B Wide-bandwidth spectrum analysis of transient signals using a real-time spectrum analyzer |
| 04/20/2011 | CN101034947B Mobile phone thimble-type RF calibration clamp |
| 04/19/2011 | US7930119 Method for analyzing AC voltage signals |
| 04/14/2011 | WO2011007972A3 System for measuring the frequency of a vibrating wire sensor using a digital counter system |
| 04/14/2011 | WO2010142811A3 System and method for representing a multi-tone signal |
| 04/14/2011 | US20110084769 Estimation and Compensation of Oscillator Nonlinearities |
| 04/14/2011 | US20110084687 Signal generation circuit, frequency measurement device including the signal generation circuit, and signal generation method |
| 04/14/2011 | US20110084686 Nature tone recognizing method and apparatus |
| 04/13/2011 | CN102012458A Occupancy measurement and triggering in frequency domain bitmaps |
| 04/13/2011 | CN102012457A Amplitude discrimination using the frequency mask trigger |
| 04/13/2011 | CN101594128B Synchronizing pulse synthesizing method and synchronizing pulse synthesizer for combined navigation processor |
| 04/13/2011 | CN101533045B Spectral analysis method for neutron pulse sequences |
| 04/12/2011 | US7925229 Power detector of embedded IC test circuits |
| 04/12/2011 | US7924100 Crystal-less communications device and self-calibrated clock generation method |
| 04/12/2011 | US7924026 Method and apparatus for determining a response of a DUT to a desired large signal, and for determining input tones required to produce a desired output |
| 04/07/2011 | WO2011040592A1 Frequency judgment device, voltage comparator circuit, and frequency measurement device |
| 04/07/2011 | US20110082656 Frequency measurement method, frequency measurement device and apparatus equipped with frequency measurement device |
| 04/06/2011 | CN201788233U Electric energy quality harmonic and over-voltage on-line monitoring device |
| 04/06/2011 | CN102004186A High-accuracy sinusoidal signal measuring method and device for removing frequency spectrum leakage |
| 04/06/2011 | CN102004182A System and implementation method for monitoring grounding current of transformer core on line |
| 04/06/2011 | CN101603984B Real-time detection method for the digitalization of electrical signal frequency |
| 04/06/2011 | CN101369004B Micro-phase shift fast transformation method used for excitation system frequency spectrum analysis |
| 04/05/2011 | US7920990 Apparatus and methods of defining spectral regions of interest for signal analysis |
| 04/05/2011 | US7919968 System and method for distortion analysis |
| 03/31/2011 | US20110077887 Wavelength-multiplexed optical signal measurement device and the method thereof |
| 03/31/2011 | US20110077886 System and method of selecting white gaussian noise sub-band using singular value decomposition |
| 03/31/2011 | US20110074514 Frequency measurement circuit and pll synthesizer provided therewith |
| 03/31/2011 | US20110074392 Signal Acquisition System Having Reduced Probe Loading of a Device Under Test |
| 03/31/2011 | US20110074391 Signal Acquisition System Having a Compensation Digital Filter |