| Patents for G01R 23 - Arrangements for measuring frequencies; Arrangements for analysing frequency spectra (7,503) |
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| 04/05/2007 | DE102005052522B3 Audio signal recognizing method for use in telephone, involves determining parameter for audio frequency depending on two Fourier coefficients, and comparing parameter with reference values for determining frequency and recognizing signal |
| 04/04/2007 | EP1770405A1 System for the identification of consumers in an electrical net and method for using the system |
| 04/04/2007 | CN1940579A RF autocorrelation signal trigger generator |
| 04/03/2007 | US7200504 Measuring temperature change in an electronic biomedical implant |
| 04/03/2007 | US7199595 Fluid quality control using broad spectrum impedance spectroscopy |
| 04/03/2007 | US7199570 Multi-channel radiometer imaging system |
| 03/29/2007 | WO2007034992A2 An apparatus and method for multi-phase digital sampling |
| 03/29/2007 | US20070073499 Method and apparatus for determining one or more s-parameters associated with a device under test (DUT) |
| 03/29/2007 | US20070069766 Phase measurement device, method, program, and recording medium |
| 03/29/2007 | US20070069739 Method and apparatus to measure differential phase and frequency modulation distortions for audio equipment |
| 03/22/2007 | US20070063711 Testing loop impedance in an RCCB electrical test circuit |
| 03/21/2007 | CN1932534A Data processing method for spectrum analyzer |
| 03/15/2007 | US20070061091 Method for identifying components of a mixture via spectral analysis |
| 03/15/2007 | DE10125347B4 Verfahren zum Auswerten einer Folge von diskreten Meßwerten A method for evaluating a sequence of discrete measurements |
| 03/15/2007 | CA2621500A1 Carbon nanotube resonators |
| 03/13/2007 | US7191081 Method for correcting an oscillator frequency |
| 03/13/2007 | US7191069 Automatic identification of compounds in a sample mixture by means of NMR spectroscopy |
| 03/13/2007 | US7190233 Methods and apparatus for measuring change in performance of ring oscillator circuit |
| 03/13/2007 | US7190174 Method for calibrating timing clock |
| 03/13/2007 | US7190144 System and method for adjusting a PID controller in a limited rotation motor system |
| 03/08/2007 | US20070052427 Test apparatus and testing method |
| 03/08/2007 | US20070052406 Broadcast receiver having integrated spectrum analysis |
| 03/07/2007 | EP1760476A2 Data processing method for spectrum analyzer |
| 03/07/2007 | CN1926435A 频率传感器和半导体装置 Frequency sensor and a semiconductor device |
| 03/06/2007 | US7188031 Method for acquiring information of a biochip using time of flight secondary ion mass spectrometry and an apparatus for acquiring information for the application thereof |
| 03/06/2007 | US7187326 System and method for cumulant-based geolocation of cooperative and non-cooperative RF transmitters |
| 03/01/2007 | WO2007025123A2 Method and apparatus for accommodating device and/or signal mismatch in a sensor array |
| 03/01/2007 | US20070050162 Apparatus and method for optical coherence tomography |
| 03/01/2007 | US20070050161 Method & apparatus for accommodating device and/or signal mismatch in a sensor array |
| 02/28/2007 | EP1757225A1 Apparataus and method for measuring pulse rate |
| 02/28/2007 | CN1920581A Frequency stability measuring apparatus |
| 02/27/2007 | US7184936 Timing variation measurement system and method |
| 02/27/2007 | US7183869 Circuit and method for temperature compensation |
| 02/22/2007 | WO2006012132A3 Generation of directional field information in the context of image processing |
| 02/22/2007 | DE10343301B4 Verfahren und System zum Charakterisieren eines Jitter von wiederholten Mustern A method and system for characterizing a jitter of repeated patterns |
| 02/21/2007 | EP1228502B1 Methods and apparatuses for signal analysis |
| 02/21/2007 | CN2872497Y Enhancing transmitting system of parameter-adjusting random resonant weak signal under strong noise background |
| 02/15/2007 | US20070035288 Test apparatus and testing method |
| 02/14/2007 | CN2869873Y High-speed multi-channel pulse amplitude analysing collector |
| 02/14/2007 | CN1300594C High frequency detection method and high frequency detection circuit |
| 02/13/2007 | US7177614 Narrowband noise mitigation in location-determining signal processing |
| 02/13/2007 | US7176670 Method and apparatus for zero-mixing spectrum analysis with Hilbert transform |
| 02/08/2007 | US20070030014 Multi-jack cable adapter for multi-cable testing and alien cross-talk cable testing |
| 02/08/2007 | US20070029990 Method and apparatus for measuring high-frequency electrical characteristics of electronic device, and method for calibrating apparatus for measuring high-frequency electrical characteristics |
| 02/08/2007 | US20070029989 Error factor acquisition device, method, program, and recording medium |
| 02/08/2007 | DE102006017277A1 Spektrumanalysator und Verfahren zum Korrigieren von Frequenzfehlern Spectrum analyzer and method of correcting frequency errors |
| 02/06/2007 | US7173433 Circuit property measurement method |
| 02/01/2007 | WO2007013302A1 Frequency component measuring device |
| 01/31/2007 | CN1906494A Dual signal RF power level detector |
| 01/30/2007 | US7171322 Algorithm for estimation of multiple faults on a transmission line or waveguide |
| 01/30/2007 | US7170251 System and method for diagnosing a controller in a limited rotation motor system |
| 01/25/2007 | WO2007009558A1 Method and apparatus for spectral estimations adapted to non-uniformities of sampling |
| 01/25/2007 | US20070021934 Measuring or test device comprising interchangeable functional units |
| 01/25/2007 | US20070018089 Radiometer imaging system and method thereof |
| 01/25/2007 | DE112005000267T5 Gerät, Verfahren, Programm und Speichermedium zur Phasenmessung Device, method, program, and storage medium for phase measurement |
| 01/24/2007 | EP1746427A1 Method and apparatus for spectral estimations adapted to non-uniformities of sampling |
| 01/18/2007 | WO2007006145A1 Polarization analysis and polarization filtering of three-component signals using the s-transform |
| 01/18/2007 | WO2006129061A3 Phase difference calculator |
| 01/18/2007 | US20070013360 Integrated spectrum analyzer circuits and methods for providing on-chip diagnostics |
| 01/17/2007 | EP1685650B1 Spectrum analyzer having a resolution filter that can be adjusted via a phase-variation parameter |
| 01/16/2007 | US7164261 Resonance-frequency measuring method determining a resonance frequency by counting the number of off-track occurrences |
| 01/11/2007 | US20070007942 Automatic non-linear phase response calibration and compensation for a power measurement device |
| 01/11/2007 | DE102005019164B4 Ring-Spannungserzeugungsschaltung und Verfahren zum Erzeugen einer Ring-Spannung Ring voltage generation circuit and method for generating a ring-voltage |
| 01/04/2007 | US20070005278 Method and apparatus for improved radiation detection |
| 01/04/2007 | US20070001661 Delay-locked loop and a method of testing a delay-locked loop |
| 01/04/2007 | DE102005028881A1 Fehlerstromanalysator zur Erfassung eines Fehlerstroms und Einrichtung mit Fehlerstromerfassungsfunktion Fehlerstromanalysator for detecting a fault current and fault current detection device with function |
| 01/03/2007 | EP1738184A1 Power quality monitoring |
| 01/03/2007 | CN1888918A Frequency conversion harmonic wave measuring method under electric system fixed frequency sampling and apparatus thereof |
| 01/02/2007 | US7158900 Pulse output function for programmable logic controller |
| 01/02/2007 | US7158525 Apparatus and process for data communication, in particular for the parameterization and remote monitoring of heating installations |
| 01/02/2007 | US7157943 Frequency selection of switch mode power converters via softstart voltage level |
| 12/28/2006 | WO2006055587A3 System and method for lossless compression of already compressed files |
| 12/27/2006 | EP1736788A2 Method and apparatus for searching electromagnetic disturbing source and non-contact voltage probe apparatus therefor |
| 12/26/2006 | US7154305 Periodic electrical signal frequency monitoring systems and methods |
| 12/21/2006 | WO2006135515A1 System and method for analyzing power flow in semiconductor plasma generation systems |
| 12/21/2006 | US20060286953 Signal measuring device |
| 12/20/2006 | EP1734371A1 Frequency sensor and semiconductor device |
| 12/19/2006 | US7152007 Imaging apparatus and method |
| 12/19/2006 | US7151379 Techniques to test transmitted signal integrity |
| 12/14/2006 | US20060279272 Method for determining the frequency response of an electrooptical component |
| 12/14/2006 | DE112005000275T5 Messgerät, Verfahren, Programm und Speichermedium Instrument, method, program, and storage medium |
| 12/07/2006 | WO2006129061A2 Phase difference calculator |
| 12/07/2006 | WO2006071572A3 Sensor for sensing an electric field |
| 12/07/2006 | WO2006071571A3 Method for sensing an electric field |
| 12/07/2006 | CA2611302A1 Phase difference calculator |
| 12/06/2006 | CN1288451C Detection method for resonance frequency of resonant type piezoelectric microsensor |
| 12/05/2006 | US7146015 Frequency threshold audio activity detector |
| 11/30/2006 | DE19746507B4 Verfahren zur Zuordnung eines Empfangssignals zu einer von mehreren Klassen von Modulationsarten Method for assigning a received signal to one of several classes of modulation types |
| 11/30/2006 | DE102006011952A1 Dualspektrumanalysator-Messsystem Dualspektrumanalysator measurement system |
| 11/29/2006 | CN1869716A Dual spectrum analyzer measurement system |
| 11/29/2006 | CN1869715A Generator set digital display device |
| 11/29/2006 | CN1287288C Variable partition method for magnetic disc drive |
| 11/29/2006 | CN1287192C Quartz wafer automatic frequency modulation method and its dedicate equipment |
| 11/28/2006 | US7142064 SRAM ring oscillator |
| 11/28/2006 | US7141962 Electrical magnetic interference test system |
| 11/23/2006 | DE102005006853B4 Messsystem und Verfahren zur Ankopplung eines Sensorelements in dem Messsystem Measurement system and method for coupling a sensor element in the measuring system |
| 11/22/2006 | EP1723444A2 Stud sensor with floating head |
| 11/22/2006 | CN1286084C Methods and apparatuses for signal analysis |
| 11/21/2006 | US7139684 High bandwidth real time oscilloscope |
| 11/16/2006 | WO2006120829A1 Mixed sound separating device |