| Patents for G01R 23 - Arrangements for measuring frequencies; Arrangements for analysing frequency spectra (7,503) |
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| 09/03/2002 | US6445327 Signal analyzing apparatus |
| 09/03/2002 | US6445219 Method and circuit configuration for converting a frequency signal to a DC voltage |
| 08/29/2002 | DE10105258A1 Auflösungs-Filter für einen Spektrumanalysator Resolution filter for a spectrum analyzer |
| 08/27/2002 | US6442704 Ring oscillator clock frequency measuring method, ring oscillator clock frequency measuring circuit, and microcomputer |
| 08/27/2002 | US6442371 Polarization measuring apparatus in a mobile communication system |
| 08/15/2002 | WO2002063258A1 Spectrometry method and device for carrying out said method |
| 08/15/2002 | US20020109510 Adjustable harmonic distortion detector and method for using the same |
| 08/14/2002 | CN2505846Y Quartz crystal wafer frequency automatic selecting device |
| 08/13/2002 | US6433531 Method for instantaneous frequency measurement |
| 08/07/2002 | EP1228502A1 Methods and apparatuses for signal analysis |
| 08/01/2002 | WO2002059632A1 Interleave ad conversion system waveform digitizer device, and test device |
| 08/01/2002 | US20020100325 Apparatus for tracking resonant frequency |
| 08/01/2002 | DE10148515A1 Frequenzspannungswandler Frequency voltage converter |
| 07/31/2002 | EP1227591A1 Frequency measurement circuit |
| 07/31/2002 | CN1361941A Spectrum modeling |
| 07/25/2002 | US20020097592 Frequency voltage converter |
| 07/25/2002 | US20020097036 Spectrum analyzer and vector network analyzer combined into a single handheld unit |
| 07/23/2002 | US6424932 Methods and apparatus for measuring spectral energy |
| 07/23/2002 | US6424184 Frequency-voltage conversion circuit, delay amount judgement circuit, system having frequency-voltage conversion circuit, method of adjusting input/output characteristics of frequency-voltage conversion circuit, and apparatus for automatically adjusting input |
| 07/23/2002 | US6424138 Spectrum analyzer utilizing a discontinuous signal record |
| 07/18/2002 | DE10162544A1 Dynamikbereichserweiterungsvorrichtung und -verfahren Dynamic range expansion apparatus and method |
| 07/17/2002 | CN1359594A Device and method for determining tone ringing frequency |
| 07/10/2002 | EP1221041A1 Highly time resolved impedance spectroscopy |
| 07/04/2002 | US20020084788 Method and apparatus for testing frequency-dependent electrical circuits |
| 06/27/2002 | US20020082792 Dynamic range extension apparatus and method |
| 06/27/2002 | US20020082786 Separation of periodic and non-periodic signal components |
| 06/26/2002 | EP1216504A1 Spectrum modeling |
| 06/26/2002 | CN1355434A Method and device for measuring frequency and period |
| 06/26/2002 | CN1355433A Tester for measuring frequency of quartz oscillator |
| 06/25/2002 | US6411101 Method and apparatus for testing frequency-dependent electrical circuits |
| 06/25/2002 | US6411076 Method for minimizing the number of delay lines required in instantaneous frequency measurement receivers and apparatus which uses same |
| 06/25/2002 | US6411075 Electronic frequency measuring device and its use |
| 06/25/2002 | US6408696 Coherent phase line enhancer spectral analysis technique |
| 06/20/2002 | WO2002048719A2 Method and apparatus for accurate measurement of communications signals |
| 06/20/2002 | US20020075013 Method and apparatus for accurate measurement of communications signals |
| 06/18/2002 | US6407684 Method and device for estimating the frequency of a digital signal |
| 06/06/2002 | US20020067432 Block distortion detection method, block distortion detection apparatus, block distortion removal method, and block distortion removal apparatus |
| 06/05/2002 | CN1086030C Receiver for spectrum analysis |
| 05/30/2002 | WO2002042733A2 Method for analyzing mass spectra |
| 05/30/2002 | WO2001089086A8 Spectrum modeling |
| 05/30/2002 | CA2429633A1 Method for analyzing mass spectra |
| 05/28/2002 | US6397154 Correlation method for surveillance device detection |
| 05/28/2002 | US6396318 Clock period sensing circuit |
| 05/28/2002 | US6396287 Process for measuring output harmonic relative to output fundamental with enhanced accuracy |
| 05/23/2002 | US20020061085 Method and apparatus for digitally measuring the frequency of a signal by integration of its signal phase |
| 05/21/2002 | US6393372 Automated frequency stepping noise measurement system |
| 05/21/2002 | US6393066 Efficient digital channelizer system and method of operation thereof |
| 05/21/2002 | US6392397 Method and apparatus for spectrum analysis by creating and manipulating candidate spectra |
| 05/21/2002 | US6389887 Process for the detection of damage to components of an engine |
| 05/15/2002 | EP1204874A2 Automated frequency stepping noise measurement test system |
| 05/15/2002 | CN1349099A 输电系统 Transmission System |
| 05/14/2002 | US6389365 Method for operating a spectrum analyzer to display a marker of a signal of interest |
| 05/14/2002 | US6388490 Clock period sensing circuit |
| 05/07/2002 | US6384589 Reference frequency spur cancellation in synthesized measurement receivers |
| 05/02/2002 | EP1201365A2 Frequency measuring device, polishing device using the same and eddy current sensor |
| 05/02/2002 | EP1200925A1 System and method for frequency compensation in an energy meter |
| 05/02/2002 | DE10052304A1 Vorrichtung und Verfahren zur Frequenzmessung mit Integration der Signalphase Apparatus and method for frequency measurement with integration of the signal phase |
| 05/01/2002 | CN2489344Y Non-on-line uninterruption power source commercial frequency detector |
| 04/25/2002 | US20020047705 Frequency measuring device, polishing device using the same and eddy current sensor |
| 04/24/2002 | EP1199574A2 Device and method for measuring frequency with signal phase integration |
| 04/24/2002 | EP1198452A2 System and method for carbohydrate sequence presentation, comparison and analysis |
| 04/23/2002 | US6377617 Real-time signal analyzer |
| 04/16/2002 | US6374189 Frequency analyzing device |
| 04/11/2002 | WO2002029426A1 Frequency conversion sweep measuring method |
| 04/11/2002 | WO2002011295A3 Method and measuring device for measuring the spectra in adjacent channels |
| 04/11/2002 | US20020042692 System for surveillance of spectral signals |
| 04/11/2002 | US20020041195 Clock period sensing circuit |
| 04/10/2002 | EP1119901B1 Frequency to frequency de-randomiser circuit |
| 04/10/2002 | EP1000464B1 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 |
| 04/10/2002 | CN1082667C Appts. for measuring pulse duration |
| 04/10/2002 | CN1082666C Method for detecting a.c signal of preset frequency, and its detecting circuit |
| 04/09/2002 | US6369738 Time domain/frequency domain data converter with data ready feature |
| 04/09/2002 | US6369585 System and method for tuning a resonant structure |
| 04/09/2002 | CA2198659C Apparatus for harmonic analysis of waveforms in an ac electrical system |
| 04/04/2002 | WO2002027336A2 Bist method for testing cut-off frequency of low-pass filters |
| 04/04/2002 | US20020039027 Dynamically periodical detecting method and detector |
| 04/04/2002 | US20020039019 Method and device for estimating the frequency of a digital signal |
| 04/04/2002 | DE10061530A1 Frequency measurement unit uses counter feedback not affected by phase offset |
| 04/03/2002 | EP1192810A2 Device and method for determining tone ringing frequency |
| 04/03/2002 | CN1082188C Evaluating device for high order harmonic wave flow |
| 04/02/2002 | US6366864 Adaptive sampling rate based on power system frequency |
| 03/28/2002 | US20020038188 Method and apparatus for enhanced mechanical signature analysis |
| 03/21/2002 | US20020035438 Fast chirp transform |
| 03/21/2002 | US20020034272 Method and apparatus for estimating the frequency and/or phase of a digital signal |
| 03/21/2002 | US20020033694 Method to determine fundamental and harmonic oscillations of a measured electrical quantity |
| 03/20/2002 | CN1340717A Frequency judgement circuit for data processing unit |
| 03/19/2002 | US6359429 Measuring method using a spectrum analyzer |
| 03/14/2002 | WO2002021282A1 Method and apparatus for estimating physical parameters in a signal |
| 03/14/2002 | US20020032536 Method for non-harmonic analysis of waveforms for synthesis, interpolation and extrapolation |
| 03/12/2002 | US6356067 Wide band signal analyzer with wide band and narrow band signal processors |
| 03/07/2002 | DE10039666A1 Digital signal phase and frequency estimation method involves reducing sampling rate of summed phase values, delaying phase values, such that resultant phase and frequency are constant over preset intervals |
| 03/06/2002 | EP1184672A1 Adjustable harmonic distortion detector, and method using same detector |
| 03/06/2002 | EP1049937B1 Method for estimating the frequency of a time signal |
| 02/28/2002 | WO2001087833A3 System and method for managing and analyzing carbohydrate sequences |
| 02/28/2002 | US20020024343 Method and apparatus for testing frequency-dependent electrical circuits |
| 02/26/2002 | US6351759 Digital channelizer having efficient architecture for discrete fourier transformation and operation thereof |
| 02/26/2002 | US6351505 Method for determining the frequency of a signal |
| 02/21/2002 | WO2001087832A3 System and method for carbohydrate sequence presentation, comparison and analysis |
| 02/20/2002 | EP1180689A2 Frequency determination circuit for a data processing unit |
| 02/19/2002 | US6349118 Digital channelizer having efficient architecture for cyclic shifting and method of operation thereof |