| Patents for G01R 23 - Arrangements for measuring frequencies; Arrangements for analysing frequency spectra (7,503) |
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| 08/30/2000 | EP1031933A2 Digital channelizer having efficient architecture for discrete fourier transformation and operation thereof |
| 08/30/2000 | EP1031932A2 DFT channelizer |
| 08/30/2000 | EP1031039A1 System for surveillance of spectral signals |
| 08/26/2000 | CA2298872A1 Digital channelizer having efficient architecture for presum discrete fourier transformation selectively of real or complex data and method of operation |
| 08/26/2000 | CA2298862A1 Digital channelizer having efficient architecture for window presum operation and method of operation thereof |
| 08/23/2000 | CA2299034A1 Configurable multi-rate channelizer for use in multiple data rate applications |
| 08/22/2000 | US6108610 Method and system for updating noise estimates during pauses in an information signal |
| 08/16/2000 | EP1027612A1 Method and measuring unit for verifying the presence of a neutral conductor connection between a four wire system and a measuring unit |
| 08/16/2000 | CN1263269A High-frequency signal measuring device |
| 08/10/2000 | DE19903960A1 Verfahren und Anordnung zur Ermittlung des ersten Moments f des Frequenzspektrums von Zeitsignalen Method and apparatus for determining the first moment f the frequency spectrum of time signals |
| 08/09/2000 | EP1026509A2 Method and apparatus for determining harmonics in electric network |
| 08/02/2000 | EP1024367A2 Frequency measurement test circuit and semiconductor integrated circuit having the same |
| 08/01/2000 | US6097194 Method and apparatus for obtaining transfer characteristics of a device under test |
| 07/27/2000 | WO2000043907A1 METHOD AND DEVICE FOR DETERMINING THE FIRST MOMENT f OF THE FREQUENCY SPECTRUM OF TIME SIGNALS |
| 07/25/2000 | US6094285 All optical RF signal channelizer |
| 07/20/2000 | DE19901751A1 Multiple combiner stage for receiver uses double balanced mixer to reduce local oscillator breakthrough |
| 07/20/2000 | DE19901750A1 Phase noise measurement unit uses feedback to cancel unit contribution to phase noise |
| 07/19/2000 | EP1019795A1 Extended resolution phase measurement |
| 07/12/2000 | EP1007983A4 Analysis of noise in repetitive waveforms |
| 07/12/2000 | EP0796433B1 Plant parameter detection by monitoring of power spectral densities |
| 07/11/2000 | US6087865 Programmable frequency divider |
| 07/11/2000 | US6087856 Biasing scheme for minimizing output drift in phase comparison and error correction circuits |
| 07/11/2000 | CA2012913C Line probing mechanism |
| 07/05/2000 | CN2386447Y Frequency tester |
| 06/28/2000 | EP1014575A1 Method and tuner for seeking and setting a resonance frequency |
| 06/27/2000 | US6081569 Method and apparatus for determining the change in frequency of a reference signal |
| 06/27/2000 | US6081137 Frequency detecting circuit |
| 06/27/2000 | CA2162073C Apparatus and method for generating a signal representative of total harmonic distortion in waveforms of an a/c electrical system |
| 06/21/2000 | EP1010985A1 Method of determining the level of harmonic distortions of an electrical network and device with it |
| 06/21/2000 | DE19680107C2 Spektrumanalysator Spectrum analyzer |
| 06/21/2000 | CN1257350A Method for detecting digital phase-locked loop frequency |
| 06/20/2000 | US6078281 Signal processing architecture which improves sonar and pulse Doppler radar performance and tracking capability |
| 06/14/2000 | EP1008923A1 Frequency-voltage conversion circuit, delay amount judgement circuit, system having frequency-voltage conversion circuit, method of adjusting input/output characterictics of frequency-voltage conversion circuit, and apparatus for automatically adjusting input/output characteristics of frequency-volt |
| 06/14/2000 | EP1007983A1 Analysis of noise in repetitive waveforms |
| 06/08/2000 | WO2000033230A1 System and method for frequency compensation in an energy meter |
| 06/08/2000 | DE19933754A1 HF-Ausgangsspektrum-Messanalysator und HF-Ausgangsspektrum-Messverfahren RF output spectrum measurement analyzer and RF output spectrum measurement method |
| 06/07/2000 | EP0632899B1 Method and apparatus for time varying spectrum analysis |
| 06/02/2000 | WO2000031556A1 Method for diagnosing insulation degradation in underground cable |
| 05/31/2000 | EP1005166A2 Method for detecting frequency of digital phase locked loop |
| 05/31/2000 | EP1004031A1 Electric arc monitoring systems |
| 05/18/2000 | DE19954348A1 Electrical power measuring system for radio communications device, uses digital filter network for simultaneous frequency band limitation and signal mixing |
| 05/17/2000 | EP1000464A1 Measuring method and device for measuring the distortion of a high frequency power amplifier and correction method and device for the automatic correction of a high frequency power amplifier |
| 05/16/2000 | US6065137 Network analyzer measurement method using adaptive signal processing |
| 05/09/2000 | US6060878 Spectrum analyzer |
| 05/02/2000 | US6058487 Period measuring circuit with maximum frequency cutoff |
| 04/27/2000 | DE19849020A1 Vorrichtung und Verfahren zum Orten von Störstellen in elektrischen Verteilnetzen Apparatus and method for locating defects in electric distribution systems |
| 04/26/2000 | EP0996244A2 Device and method for location of interference sources in electrical distribution networks |
| 04/26/2000 | CN1051848C Satellite spectral monitoring and controlling instrument |
| 04/20/2000 | WO2000022444A1 A method and system for updating noise estimates during pauses in an information signal |
| 04/20/2000 | DE19845744A1 Frequenzganganalysator Frequency response |
| 04/18/2000 | US6052107 Method and apparatus for displaying graticule window data on a computer screen |
| 04/13/2000 | WO2000021190A1 Frequency to frequency de-randomiser circuit |
| 04/13/2000 | WO2000020875A1 Frequency response analyzer |
| 04/12/2000 | EP0992800A1 Apparatus and method for measuring the resonance frequency of an electric circuit |
| 04/12/2000 | EP0991951A1 A spectrum analyser |
| 04/05/2000 | EP0990161A2 Two port handheld vector network analyzer with frequency monitor mode |
| 03/29/2000 | EP0988509A1 Method for displaying statistically occurring events |
| 03/28/2000 | US6043749 Frequency detection circuit |
| 03/08/2000 | EP0984288A1 Wide band IQ splitting apparatus and calibration method therefor |
| 03/01/2000 | EP0982855A1 Method and device for the spectral analysis of signals transmitted by a radio communication system |
| 03/01/2000 | CN1245897A Harmonic quantitative measurement method of power system and its measurement instrument |
| 02/27/2000 | CA2280432A1 Process for rejecting a part of a signal transmitted at a given frequency, and circuit for its implementation |
| 02/24/2000 | WO2000010017A1 Method and apparatus for differentiating contributions of harmonic pollution sources |
| 02/23/2000 | EP0981054A2 Wide band signal analyzer |
| 02/22/2000 | US6029055 Frequency stabilization circuit using signal level threshold |
| 02/16/2000 | CN1244968A Apparatus for tracking resonant frequency |
| 02/16/2000 | CN1049499C Method for monitoring harmonic wave of electric power by electronic computer |
| 02/03/2000 | WO2000005591A1 Method of and apparatus for generating a multitone test signal |
| 02/02/2000 | EP0977384A1 Method and apparatus for measuring spectral energy of mobile handset |
| 02/02/2000 | EP0975981A2 Analog spectrum display for environmental control |
| 02/01/2000 | US6021204 Analysis of audio signals |
| 02/01/2000 | US6020733 Two port handheld vector network analyzer with frequency monitor mode |
| 01/25/2000 | US6018702 Tuned filter calibration system |
| 01/19/2000 | EP0973041A1 Real time signal analyzer |
| 01/13/2000 | WO2000002056A1 Method for measuring the frequency of a sinusoidal signal |
| 01/11/2000 | US6014620 Power spectral density estimation method and apparatus using LPC analysis |
| 01/11/2000 | US6014617 Method and apparatus for extracting a fundamental frequency based on a logarithmic stability index |
| 01/11/2000 | US6014027 Current and voltage probe for measuring harmonic distortion |
| 01/05/2000 | DE19922249A1 Fixed frequency analysis procedure used in sweeping type spectrum analyzer |
| 12/30/1999 | DE19908475A1 Calibration system for YIG (yttrium-iron-garnet)-tuned filter (YTF) in spectrum analyzer |
| 12/29/1999 | EP0966702A2 Time interval measurement system incorporating a linear ramp generation circuit |
| 12/21/1999 | US6005382 Output signal measuring apparatus for multiple frequency oscillator and output signal measuring and correcting methods thereof |
| 12/21/1999 | CA2093015C A method of calibrating a spectrometer using correlation between calibration sample spectra and measured spectra |
| 12/15/1999 | CN1238843A Frequency-voltage conversion circuit, delay amount judgement circuit, system having frequency-voltage conversion circuit, method of adjusting input/output characteristics of frequency-voltage conversi |
| 12/08/1999 | EP0962104A1 Tone detection using discrete fourier transform techniques |
| 12/02/1999 | WO1999062177A1 Method for deriving or calibrating a frequency of a clock signal |
| 12/02/1999 | WO1999061925A1 Method for improving the accuracy in the determination of a waveform center |
| 12/02/1999 | CA2334281A1 Method for improving the accuracy in the determination of a waveform center |
| 12/01/1999 | EP0961411A1 Procedure for deriving a clock frequency |
| 11/30/1999 | US5995914 Method and apparatus for asynchronously measuring frequency shifted signals |
| 11/30/1999 | US5994890 Harmonics survey system |
| 11/24/1999 | EP0958716A1 Method for determining the resonance frequency of an electric resonant circuit |
| 11/17/1999 | CN1235675A Determination of fundamental and harmonic oscillations of measured electrical quantity |
| 11/02/1999 | US5977801 Self-resetting phase/frequency detector with reduced dead zone |
| 10/28/1999 | DE19918047A1 Frequency comparator for phase locked loop circuit |
| 10/26/1999 | US5973662 Analog spectrum display for environmental control |
| 10/26/1999 | US5973523 Time counting circuit, sampling circuit, skew adjusting circuit, and logic analyzing circuit |
| 10/26/1999 | US5973501 Current and voltage probe for measuring harmonic distortion |
| 10/20/1999 | EP0858604A4 Source of waveform distortion discrimination circuit and method |
| 10/14/1999 | DE19857834A1 Analyzer network measurement method |