| Patents for G01R 23 - Arrangements for measuring frequencies; Arrangements for analysing frequency spectra (7,503) |
|---|
| 05/16/2001 | EP1100258A1 Device for measuring period of synchronizing signal and display device |
| 05/15/2001 | US6233529 Frequency spectrum analyzer having time domain analysis function |
| 05/15/2001 | US6233288 Spectrum analyzer |
| 05/15/2001 | US6232760 Method for determining and compensating the transmission function of a measurement apparatus, in particular of a spectrum analyzer |
| 05/10/2001 | WO2001033547A1 Methods and apparatuses for signal analysis |
| 05/09/2001 | CN1065693C Frequency detecting and controlling circuits of clockgenerator |
| 05/08/2001 | US6229316 Measuring method by spectrum analyzer |
| 05/08/2001 | US6229315 Hand-held harmonics detector |
| 05/03/2001 | WO2001031350A1 Control system for a failure mode testing system |
| 05/02/2001 | EP1095283A1 Method for measuring the frequency of a sinusoidal signal |
| 05/02/2001 | CN2428782Y Frequency phase-difference and frequency stability-degree test instrument |
| 05/01/2001 | CA2160655C Data collection and processing for digital ac power system monitor/analyzer |
| 04/26/2001 | WO2001029969A1 Frequency measurement circuit |
| 04/25/2001 | EP1093680A1 Adaptive sampling rate based on power system frequency |
| 04/25/2001 | CN1292876A Simultaneous display of primary measurement values and derived parameters |
| 04/24/2001 | US6220085 Vehicle-velocity calculating apparatus |
| 04/24/2001 | CA2092713C Spectral data measurement and correction |
| 04/19/2001 | WO2001027605A1 Highly time resolved impedance spectroscopy |
| 04/19/2001 | DE10018745A1 Hoch-zeitauflösende Impedanzspektroskopie High-resolution time-impedance spectroscopy |
| 04/19/2001 | CA2387998A1 Highly time resolved impedance spectroscopy |
| 04/18/2001 | CN2426978Y Millimeter wave measuring instrument |
| 04/17/2001 | US6218907 Frequency comparator and PLL circuit using the same |
| 04/17/2001 | CA2133837C Full and partial cycle counting apparatus and method |
| 04/12/2001 | WO2001025811A1 Arrangement for determining the complex transmission function of a measuring device |
| 04/10/2001 | US6215316 Method and apparatus for measuring harmonic current sources in electric power distribution systems |
| 04/03/2001 | US6211663 Baseband time-domain waveform measurement method |
| 03/27/2001 | US6208946 High speed fourier transform apparatus |
| 03/27/2001 | US6208945 Harmonic component measuring method for power system |
| 03/22/2001 | DE10021932A1 Verfahren zum Betreiben eines Spektrumanalysators zum Anzeigen eines Markierers eines interessierenden Signals A method of operating a spectrum analyzer to display a marker of a signal of interest |
| 03/20/2001 | US6205202 Subscriber line tester |
| 02/27/2001 | US6195675 Tone detection using discrete fourier transform techniques |
| 02/27/2001 | US6195617 Digital storage oscilloscope with simultaneous primary measurement and derived parameter display on common time axis and method therefor |
| 02/27/2001 | US6194925 Time interval measurement system incorporating a linear ramp generation circuit |
| 02/27/2001 | US6194918 Phase and frequency detector with high resolution |
| 02/20/2001 | US6191571 Measuring method by spectrum analyzer |
| 02/20/2001 | CA2267371C 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-voltage conversion circuit |
| 02/06/2001 | US6185510 PLL jitter measuring method and integrated circuit therewith |
| 02/06/2001 | US6185509 Analysis of noise in repetitive waveforms |
| 02/06/2001 | CA2139575C High speed power analyzer |
| 01/31/2001 | EP1072897A2 Method and apparatus for searching electromagnetic disturbing source and noncontact voltage probe therefor |
| 01/31/2001 | CN1061504C Digital method and apparatus for measuring frequency of IF signal |
| 01/30/2001 | US6182017 Method and apparatus for differentiating contributions of harmonic pollution sources |
| 01/25/2001 | DE19935973A1 Electrical signal component amplitude and/or frequency measuring method e.g. for surveillance alarm system, uses elimination of detected maxima and minima points in sampled signal waveform caused by noise |
| 01/18/2001 | DE19930707A1 Measurement procedure, device and analysis electronics for conversion of signals from a time to a frequency domain etc. using a Fourier transform in which an improved method is used to yield considerable computer time savings |
| 01/18/2001 | DE19930458A1 Tonruf-Frequenzbestimmungsvorrichtung und -verfahren Determining tone ringing frequency apparatus and method |
| 01/18/2001 | DE10010960A1 Ring oscillator timing frequency measurement procedure in which a pulse train from the oscillator circuit is compared with a pulse train from an external reference source over an identical period and a comparison made |
| 01/11/2001 | WO2001003445A2 Device and method for determining tone ringing frequency |
| 01/10/2001 | EP1066534A1 Vector network analyser |
| 01/09/2001 | US6172533 Phase and frequency detector with high resolution |
| 01/02/2001 | US6169760 Fast, highly accurate frequency measurement technique |
| 12/27/2000 | EP1062521A1 Simultaneous display of primary measurement values and derived parameters |
| 12/26/2000 | US6167351 Period determination of a periodic signal |
| 12/26/2000 | US6166533 Frequency spectrum analyzer with high C/N ratio |
| 12/20/2000 | EP1031039A4 System for surveillance of spectral signals |
| 12/20/2000 | CN2411489Y Logic testing probe with easyly testing frequency and duty ratio function |
| 12/19/2000 | US6163293 Radio wave receiving apparatus having an improved antenna resolution |
| 12/19/2000 | US6163223 High performance dual mode multiple source/local oscillator module |
| 12/19/2000 | US6161420 High frequency measuring circuit |
| 12/05/2000 | US6157552 Sub-harmonic detection and control system |
| 12/05/2000 | US6157183 Two port handheld vector network analyzer with frequency monitor mode |
| 11/28/2000 | US6154710 Method and apparatus for searching electromagnetic disturbing source and non-contact voltage probe apparatus therefor |
| 11/28/2000 | US6154682 Self-checking circuit in microwave equipment |
| 11/28/2000 | US6154037 System and method for testing distortion in transformers |
| 11/23/2000 | WO2000070357A2 Automated frequency stepping noise measurement test system |
| 11/23/2000 | DE19961817A1 Method and device for detecting deviations in frequency for DTMF signals contains numerous analysing devices to analyse signals received in blocks in respect of frequency components at prescribed frequencies. |
| 11/22/2000 | EP1053479A1 Electric arc monitoring systems |
| 11/22/2000 | EP0812425A4 Process and machine for signal waveform analysis |
| 11/16/2000 | WO2000069042A1 Adaptive sampling rate based on power system frequency |
| 11/15/2000 | CN1273475A Frequency error measuring device and frequency error measuring method |
| 11/14/2000 | US6148188 Dynamic Temperature Measurement |
| 11/14/2000 | US6147486 Device for analyzing an alternating voltage or current including a variable D.C. component |
| 11/14/2000 | US6147475 Prediction of harmonic distortion and application of power-factor correction in AC power systems |
| 11/08/2000 | EP1050759A2 Bandpass sampling architecture for wide-frequency band signal analysis |
| 11/08/2000 | EP1049937A1 Method for estimating the frequency of a time signal |
| 11/07/2000 | CA2209417C Method and apparatus for signal analysis |
| 10/31/2000 | US6140809 Spectrum analyzer |
| 10/31/2000 | CA2051683C Cerebral biopotential analysis system and method |
| 10/25/2000 | CN1271101A Bandpass sampling structure of wide frequency band signal analysis |
| 10/24/2000 | US6137283 Process and machine for signal waveform analysis |
| 10/19/2000 | DE10009039A1 Clock period detection circuit for multiplier circuit, detects whether clock signal passes through detector or bypasses detector to output control signal, based on which clock period is detected |
| 10/18/2000 | CN1270412A System and method for compensating parameter of crystal sheets |
| 10/18/2000 | CN1057645C Earthleakage-current protection device |
| 10/04/2000 | EP1019795A4 Extended resolution phase measurement |
| 10/04/2000 | CN1269044A Analog spectrum display for environmental control |
| 10/04/2000 | CN1268666A Frequency measurement and cycle measurement based integrated signal detection and processing method |
| 10/04/2000 | CN1057177C Synchronization circuit using a high speed digital slip counter |
| 10/03/2000 | US6128584 System and method for frequency compensation in an energy meter |
| 10/03/2000 | US6127829 Method and apparatus for the efficient test of the center frequency of bandpass filters |
| 09/20/2000 | EP1037059A1 Frequency converter for spectrum analysers |
| 09/20/2000 | EP1037058A1 Electronic frequency measuring device and its utilisation |
| 09/20/2000 | EP0824776B1 Method and apparatus for detecting arcing in ac power systems by monitoring high frequency noise |
| 09/19/2000 | US6121778 Method and apparatus for testing frequency-dependent electrical circuits |
| 09/06/2000 | CN1265752A Extended resdution phase measurement |
| 09/05/2000 | US6114871 Abnormality detecting method and apparatus for electrical equipment, particularly for a rotating electric machine |
| 09/05/2000 | US6114859 Harmonic characteristic measuring method and harmonic characteristic measuring apparatus |
| 08/30/2000 | EP1032156A2 Windowed presummation calcualtor for digital channeliser |
| 08/30/2000 | EP1032155A2 Cyclic shifting for a digital channeliser |
| 08/30/2000 | EP1032154A2 Configurable multi-rate channelizer for use in multiple data rate applications |
| 08/30/2000 | EP1032149A2 Efficient digital channelizer system and method of operation thereof |
| 08/30/2000 | EP1032124A2 Digital channelizer having efficient architecture for presum discrete fourier transformationselectively of real or complex data and method of operation |