| Patents for G01R 23 - Arrangements for measuring frequencies; Arrangements for analysing frequency spectra (7,503) |
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| 04/21/2004 | CN1490527A Manufacturing apparatus and life predictive method for whirler |
| 04/20/2004 | US6724178 Measuring composite distortion using a coherent multicarrier signal generator |
| 04/20/2004 | US6724177 Method and apparatus for accurate measurement of communications signals |
| 04/14/2004 | CN1489132A Variable partition method for manetic disc drive |
| 04/13/2004 | US6721673 Estimating a plurality of tones in an input signal |
| 04/08/2004 | WO2004005945A8 Frequency estimation |
| 04/08/2004 | US20040066239 Frequency/signal converter and switching regulator having such a converter |
| 04/08/2004 | US20040066182 Measuring device, in particular vectorial network analyzer, with separate oscillators |
| 04/07/2004 | EP1405089A1 Distortion detector |
| 04/07/2004 | EP1405088A1 Electrical utility meter having harmonic data templates for power quality alarm thresholds |
| 04/07/2004 | EP1405087A1 Low leakage technique for determining power spectra of non-coherently sampled data |
| 04/06/2004 | US6717394 Method and apparatus for determining frequency of an alternating current signal of an electric power system |
| 04/01/2004 | WO2004028003A2 A system and method for monitoring harmonic content of an rf signal |
| 04/01/2004 | US20040064277 Manufacturing apparatus and method for predicting life of a manufacturing apparatus which uses a rotary machine |
| 03/31/2004 | EP1403776A1 Frequency analysis method and apparatus, and spectrum spread demodulation method and apparatus |
| 03/25/2004 | WO2004025836A1 Method and device for detecting period length fluctuations of periodic signals |
| 03/25/2004 | WO2003102610A3 Method and device for detection in the frequency range, based on a time range measurement |
| 03/25/2004 | US20040059760 Waveform detector and state monitoring system using it |
| 03/25/2004 | US20040059530 Method for analyzing mass spectra |
| 03/25/2004 | DE10201995B4 Verfahren zur Zuordnung eines Pulslaufes zu einem von einer Mehrzahl von Pulstypen verschiedener Abklingzeit und Vorrichtung zu dessen Durchführung A method for assigning a pulse to a barrel of a plurality of types of different pulse decay time and device for its implementation |
| 03/24/2004 | EP0945731B1 Real-time signal analyzer |
| 03/24/2004 | CN2607581Y Balance type detecting rod device |
| 03/24/2004 | CN1143236C Method and apparatus for displaying graticule window data on computer screen |
| 03/16/2004 | US6708127 Beam propagation method for step-index waveguides |
| 03/11/2004 | US20040048586 Frequency verification of an amplitude modulated signal |
| 03/11/2004 | US20040047241 Wearable wrist watch means having function for detecting unlawful recorded radio audio/video signals |
| 03/10/2004 | CN2606358Y Transmission type microwave signal sampling and measuring devices |
| 03/10/2004 | CN1480580A System for automatic detecting and controlling power supply frequency and method applied to waching machine |
| 03/04/2004 | US20040041554 Frequency conversion sweep measuring method |
| 03/04/2004 | DE19933754B4 Verfahren und Vorrichtung zur Hochfrequenzspektralanalyse Method and apparatus for Hochfrequenzspektralanalyse |
| 03/03/2004 | EP1394948A2 Synchronised sinusoidal signal controller |
| 03/03/2004 | EP1393084A2 Device for measuring frequency |
| 03/02/2004 | US6701265 Calibration for vector network analyzer |
| 03/02/2004 | US6700366 Very fast swept spectrum analyzer |
| 03/02/2004 | CA2225231C Tone detection using discrete fourier transform techniques |
| 02/26/2004 | WO2004017082A1 Semiconductor inspection device and semiconductor device manufacturing method |
| 02/25/2004 | EP1391739A1 Waveform detector and state monitoring system using it |
| 02/25/2004 | EP1390764A1 Method for determining the frequency of the current ripple in the armature current of a commutated d.c motor |
| 02/25/2004 | CN2604453Y Electric power frequency automatic detecting control system for washing machine |
| 02/25/2004 | CN1477401A High-accuracy synchronous phasor measuring method |
| 02/24/2004 | US6696868 Frequency to frequency de-randomizer circuit |
| 02/19/2004 | US20040034490 Observation and/or failure inspection apparatus, method and program therefor |
| 02/19/2004 | US20040032256 Frequency measuring device, polishing device using the same and eddy current sensor |
| 02/17/2004 | CA2298999C Digital channelizer having efficient architecture for cyclic shifting and method of operation thereof |
| 02/12/2004 | DE10131251B4 Messung der Frequenzen und Amplituden bei Mehrtonsignalen Measurement of the frequencies and amplitudes at multitone |
| 02/11/2004 | CN1474188A Device and method for detecting long term frequency stability of clock |
| 02/10/2004 | US6691050 Data acquisition instrument architecture with flexible data acquisition, processing and display |
| 02/05/2004 | US20040024548 Method and apparatus for waveform measurement instrument |
| 02/05/2004 | US20040021489 Periodic signal controller |
| 02/03/2004 | US6687630 Low leakage technique for determining power spectra of non-coherently sampled data |
| 02/03/2004 | US6686870 Radar |
| 02/03/2004 | CA2298918C Digital channelizer having efficient architecture for window presum using distributed arithmetic for providing window presum calculations in one clock cycle |
| 01/29/2004 | US20040019449 In-system testing of an oscillator |
| 01/28/2004 | EP0788607B1 Ratiometric fourier analyzer |
| 01/20/2004 | US6681191 Frequency domain analysis system for a time domain measurement instrument |
| 01/15/2004 | WO2004005945A1 Frequency estimation |
| 01/15/2004 | WO2003060615A3 Pulse output function for programmable logic controller |
| 01/15/2004 | US20040008020 System and method for extending the range of a frequency measuring device |
| 01/14/2004 | EP1381158A2 Frequency/signal converter and switching regulator employing said converter |
| 01/14/2004 | EP1379844A1 Apparatus and method for the analysis of signal frequencies |
| 01/14/2004 | EP1119774B1 Frequency response analyzer |
| 01/14/2004 | CN1468377A Frequency conversion sweep measuring method |
| 01/14/2004 | CN1134669C Method and device for monitoring power-supply network |
| 01/07/2004 | CN1466688A BIST method for testing cut-off frequency of low-pass filters |
| 01/07/2004 | CN1133877C Harmonic quantitative measurement method of power system and measurement instrument |
| 01/06/2004 | US6675104 Method for analyzing mass spectra |
| 01/06/2004 | US6674277 Frequency measurement circuit |
| 01/02/2004 | EP1373908A1 Method and device for analysing a digital audio signal |
| 12/31/2003 | WO2004001722A1 Method for noise suppression in information signal and device for carrying out said method |
| 12/31/2003 | WO2004001557A2 Hardware implementation of the pseudo-spectral time-domain method |
| 12/31/2003 | CN1464979A Low leakage technique for determining power spectra of non-coherently sampled data |
| 12/30/2003 | US6671638 Oscillation measuring method and frequency measuring apparatus |
| 12/23/2003 | US6667692 Electrical utility meter having harmonic data templates for power quality alarm thresholds |
| 12/16/2003 | US6665697 Fourier analysis method and apparatus calculating the Fourier factor Wn utilizing trigonometric relations |
| 12/16/2003 | CA2346251C A method and system for updating noise estimates during pauses in an information signal |
| 12/16/2003 | CA2299100C Efficient digital channelizer system and method of operation thereof |
| 12/11/2003 | WO2003102810A2 Waveform analysis |
| 12/11/2003 | WO2003102610A2 Method and device for detection in the frequency range, based on a time range measurement |
| 12/11/2003 | WO2003102605A1 Method for fast frequency estimation by means of the rls method |
| 12/11/2003 | WO2002099443A3 Device for measuring frequency |
| 12/10/2003 | CN1460876A Quartz wafer automatic frequency modulation method and its special equipment |
| 12/09/2003 | US6662001 Multi-heterodyne stage for a receiver or spectrum analyzer |
| 12/04/2003 | US20030225534 Waveform analysis |
| 12/04/2003 | US20030222652 Methods for determining corrected intermodulation distortion (IMD) product measurements for a device under test (DUT) |
| 12/02/2003 | US6657573 Phase to sine amplitude conversion system and method |
| 11/27/2003 | US20030220702 State Machine for a pulse output function |
| 11/27/2003 | US20030219086 Jitter identification using a wide bandwidth oscilloscope |
| 11/20/2003 | US20030214309 RF power sensor for measuring an RF signal power using capacitance |
| 11/18/2003 | US6651016 Jitter-corrected spectrum analyzer |
| 11/18/2003 | US6650124 Method for checking an occurrence of a signal component and device to perform the method |
| 11/13/2003 | WO2003093841A1 Method and device for measuring intermodulation distortion |
| 11/13/2003 | WO2003044543A3 Method and apparatus for measuring a waveform |
| 11/12/2003 | CN1455261A Radio-frequency power sensor using capacitance to measure radio frequency signal power |
| 11/11/2003 | US6646428 Sweep synchronization testing |
| 11/04/2003 | CA2299021C Digital channelizer having efficient architecture for discrete fourier transformation and operation thereof |
| 10/30/2003 | WO2003089942A1 System and method for extending the range of a frequency measuring device |
| 10/30/2003 | WO2003056348A3 Method for determining the frequency of a pulse input signal over a wide frequency range |
| 10/30/2003 | US20030204315 System and method for carbohydrate sequence presentation, comparison and analysis |
| 10/29/2003 | EP1355727A1 Method for analyzing mass spectra |
| 10/22/2003 | EP1355162A1 RF power sensor for measuring an RF signal power using capacitance |