| Patents for G01R 23 - Arrangements for measuring frequencies; Arrangements for analysing frequency spectra (7,503) |
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| 10/12/2004 | US6804628 System for surveillance of spectral signals |
| 10/07/2004 | WO2003102810B1 Waveform analysis |
| 10/06/2004 | CN2646719Y 频率变送器 Frequency transmitter |
| 10/05/2004 | US6801145 Interleaving A/D conversion type waveform digitizer module and a test apparatus |
| 09/30/2004 | US20040190657 Communications device with doppler frequency estimation functions |
| 09/30/2004 | US20040189525 System and method for cumulant-based geolocation of cooperative and non-cooperative RF transmitters |
| 09/29/2004 | EP1461669A2 Pulse output function for programmable logic controller |
| 09/29/2004 | EP1461635A1 Rejection of narrowband frequency components in wideband positioning signals |
| 09/28/2004 | US6798678 Frequency voltage converter |
| 09/23/2004 | US20040185802 Method and device for determining sideband ratio of superconduction mixer using comb generator |
| 09/23/2004 | US20040183450 Method and apparatus for determining the resonant frequency of a resonant circuit |
| 09/22/2004 | CN2643325Y Low-frequency time code signal detecting instrument |
| 09/22/2004 | CN1168212C Frequency measurement circuit |
| 09/16/2004 | DE19961817B4 Frequenzabweichung detektierendes Gerät und Frequenzabweichungs-Detektionsverfahren Frequency deviation detecting apparatus and frequency deviation detection method |
| 09/16/2004 | DE10310143A1 Verfahren und Vorrichtung zur Bestimmung der Resonanzfrequenz eines Resonanzkreises Method and apparatus for determining the resonant frequency of a resonant circuit |
| 09/15/2004 | EP1456677A2 Method for determining the frequency of a pulse input signal over a wide frequency range |
| 09/15/2004 | EP1204874B1 Automated frequency stepping noise measurement test system |
| 09/15/2004 | EP1019795B1 Extended resolution phase measurement |
| 09/09/2004 | US20040177290 Frequency detection circuit and data processing apparatus |
| 09/09/2004 | US20040174943 Narrowband noise mitigation in location-determining signal processing |
| 09/08/2004 | EP1455192A2 Apparatus and method for measuring the resonance frequency of a resonant circuit |
| 09/08/2004 | CN1527061A Intelligent frequency system with steel string sensor |
| 09/07/2004 | US6788044 Frequency change measuring device |
| 09/07/2004 | US6787938 Method and circuit for switchover between a primary and a secondary power source |
| 09/07/2004 | CA2459214A1 Method and apparatus for determining the resonant frequency of a resonant circuit |
| 08/31/2004 | US6784655 Method of setting gribs and/or markers in measuring apparatus |
| 08/31/2004 | US6784654 Signal reproduction block |
| 08/26/2004 | US20040165885 Method and apparatus for measuring the RF spectrum of an optical signal |
| 08/26/2004 | US20040164777 Comparator |
| 08/26/2004 | DE10295886T5 Wellenform-Digitalisierungsmodul vom A/D- Umwandlungs-Verschachtelungstyp und Prüfvorrichtung Waveform digitizer module from the A / D conversion Verschachtelungstyp and Tester |
| 08/25/2004 | EP1450497A2 Communications device with Doppler frequency estimation functions |
| 08/24/2004 | US6782045 Frequency error measuring method and frequency error measuring device |
| 08/19/2004 | WO2004070402A1 Harmonic diagnosing method for electric facility |
| 08/19/2004 | WO2003102810A3 Waveform analysis |
| 08/19/2004 | US20040162685 System for surveillance of spectral signals |
| 08/19/2004 | US20040160330 Method and circuit for switchover between a primary and a secondary power source |
| 08/19/2004 | US20040160278 Distortion detector |
| 08/18/2004 | EP0973041B1 Real time signal analyzer |
| 08/12/2004 | US20040155642 Method and device for verifying frequency of clock signal |
| 08/11/2004 | EP1445867A1 Detector circuit |
| 08/11/2004 | EP1062521B1 Simultaneous display of primary measurement values and derived parameters |
| 08/11/2004 | CN1520519A Disortion detector |
| 08/10/2004 | US6775629 System and method for estimating one or more tones in an input signal |
| 08/10/2004 | CA2450499C Improved distortion analyzer for compensation apparatus of first-order polarization mode dispersion (pmd) |
| 08/04/2004 | EP1443334A1 HIGH−FREQUENCY DETECTION METHOD AND HIGH−FREQUENCY DETECTION CIRCUIT |
| 07/29/2004 | US20040148116 Estimating a plurality of tones in an input signal |
| 07/28/2004 | EP1236050B1 Analysing signals |
| 07/28/2004 | EP0990161B1 Two port handheld vector network analyzer with frequency monitor mode |
| 07/28/2004 | CN1159592C Digital measuring method of frequency and phase |
| 07/22/2004 | US20040143406 Measuring apparatus and measuring method for pattern dependent jitter |
| 07/21/2004 | CN1514255A Frequency detecting circuit and data processor |
| 07/21/2004 | CN1158534C Frequency change measurer |
| 07/20/2004 | US6766262 Methods for determining corrected intermodulation distortion (IMD) product measurements for a device under test (DUT) |
| 07/13/2004 | US6763323 Resolution filter for a spectrum analyzer |
| 07/06/2004 | US6760674 Audio spectrum analyzer implemented with a minimum number of multiply operations |
| 07/06/2004 | US6760673 Method and apparatus for waveform measurement instrument |
| 07/01/2004 | US20040125893 Methods and systems for tracking of amplitudes, phases and frequencies of a multi-component sinusoidal signal |
| 06/30/2004 | EP1434057A2 Frequency detection circuit and data processing apparatus |
| 06/24/2004 | WO2004054316A1 Resonance frequency sensing method, resonance frequency selecting method, and resonance frequency sensor |
| 06/24/2004 | US20040122608 DFT leakage removal for non-coherently sampled signals |
| 06/23/2004 | EP1431770A1 Measuring apparatus and measuring method for pattern dependent jitter |
| 06/23/2004 | CN1154903C Frequency-voltage conversion circuit for receiving clock as input signal and providing voltage as output signal |
| 06/22/2004 | CA2298789C Electric arc monitoring systems |
| 06/17/2004 | US20040113632 Distortion measurements with a vector network analyzer |
| 06/17/2004 | CA2453711A1 Methods and systems for tracking of amplitudes, phases and frequencies of a multi-component sinusoidal signal |
| 06/15/2004 | US6751690 Data converter with statistical domain output |
| 06/15/2004 | US6751641 Time domain data converter with output frequency domain conversion |
| 06/15/2004 | US6751564 Waveform analysis |
| 06/03/2004 | WO2004028003A3 A system and method for monitoring harmonic content of an rf signal |
| 06/03/2004 | WO2004001557A3 Hardware implementation of the pseudo-spectral time-domain method |
| 06/01/2004 | US6745155 Methods and apparatuses for signal analysis |
| 06/01/2004 | US6744247 Method and measuring device for measuring the spectra in adjacent channels |
| 05/27/2004 | US20040100245 Frequency measurement circuit |
| 05/27/2004 | US20040100244 Frequency analyzing method, frequency analyzing apparatus, and spectrum analyzer |
| 05/26/2004 | EP1421395A2 Method and apparatus for measuring a waveform |
| 05/26/2004 | CN1500000A Method for analyzing mass spectra |
| 05/26/2004 | CN1151379C Millimeter wave measuring meter and method |
| 05/20/2004 | US20040098213 Method for determining the frequency of the current ripple in the armature current of a commutated DC motor |
| 05/19/2004 | EP1420256A1 Method and device for determining sideband ratio of superconduction mixer using comb generator |
| 05/19/2004 | EP1419630A1 Monitoring upstream frequency band |
| 05/18/2004 | US6737852 Clock skew measuring apparatus and method |
| 05/13/2004 | US20040090247 Signal detect circuit for high speed data receivers |
| 05/13/2004 | DE19523343B4 Vorrichtung zum Messen einer Leckleistung An apparatus for measuring a leakage power |
| 05/12/2004 | CN1149635C System and method for compensating parameter of crystal sheets |
| 05/11/2004 | US6735303 Periodic signal detector |
| 05/11/2004 | US6735265 Comparator |
| 05/04/2004 | US6731745 Frequency deviation detecting apparatus and frequency deviation detecting method |
| 04/29/2004 | US20040083069 Method for optimum spectrum analysis |
| 04/29/2004 | US20040080442 Interleaving A/D conversion type waveform digitizer module and a test apparatus |
| 04/28/2004 | EP1413890A1 Precise frequency measuring circuit by time difference expansion and two counters as well as resonant pressure sensor transmitter |
| 04/28/2004 | EP0877945B1 A receiver for spectrum analysis |
| 04/28/2004 | CN1147734C Commercial power frequency monitoring method and device |
| 04/27/2004 | US6728642 Method of non-linear analysis of biological sequence data |
| 04/27/2004 | CA2198628C Debris monitoring |
| 04/22/2004 | WO2004033997A1 Measurement device and measurement result display method |
| 04/22/2004 | US20040077328 Frequency modulating device of an integrated circuit and a method of measuring modulated frequency |
| 04/22/2004 | US20040075425 Frequency measuring circuit and resonant pressure sensor type differential pressure/pressure transmitter using the frequency measuring unit |
| 04/22/2004 | DE10296446T5 Frequenzanalyseverfahren, Frequenzanalyseapparat und Spektrumanalysator Frequency analysis method, frequency and spectrum analysis apparatus |
| 04/22/2004 | DE10246700A1 Meßvorrichtung, insbesondere vektorieller Netzwerkanalysator, mit getrennten Oszillatoren Measuring device, in particular vectorial network analyzer, with separate oscillators |
| 04/22/2004 | DE10245872A1 Device and process to determine the output frequency of a current inverter converts it into a one bit digital signal which is integrated and compared with a reference value |