| Patents for G01R 25 - Arrangements for measuring phase angle between a voltage and a current or between voltages or currents (2,594) |
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| 06/26/2008 | US20080154525 Exponential smoothing of aperiodically measured values with staleness reporting |
| 06/26/2008 | US20080150515 Current measuring arrangement of a frequency converter |
| 06/25/2008 | CN101206236A Device and method for detecting phase difference |
| 06/11/2008 | CN201072432Y Distant range short circuit multi-phase detection device |
| 06/04/2008 | EP1927003A2 Phase detector system |
| 06/04/2008 | CN100392721C Scaling persistence data with interpolation |
| 06/04/2008 | CN100392413C Noise detection device |
| 06/03/2008 | US7383140 Capacitance, inductance and impedance measurements using multi-tone stimulation and DSP algorithms |
| 06/03/2008 | US7382163 Phase frequency detector used in digital PLL system |
| 05/29/2008 | WO2007082125A3 Method and apparatus for measurement of electrical resistance |
| 05/29/2008 | DE102004027349B4 Prüfanordnuung und Verfahren zum Ermitteln des Verlustfaktors einer Hochspannungsdurchführung Prüfanordnuung and method for determining the loss factor of a high-voltage bushing |
| 05/28/2008 | CN101187677A Multifunctional electrical parameter measuring instrument |
| 05/27/2008 | US7378854 Dual sine-wave time stamp method and apparatus |
| 05/22/2008 | US20080120053 Method of crossover region phase correction when summing signals in multiple frequency bands |
| 05/22/2008 | US20080116877 Method and Apparatus for Detecting the Phase Wiring of an Arbitrary Unknown Phase Voltage Relative to a Reference Phase Voltage |
| 05/21/2008 | CN101183485A Distribution transformer automatic gauging device |
| 05/21/2008 | CN101183144A Single-phase power-supply wiring judgement method and single-phase power supply phase testing circuit |
| 05/20/2008 | US7375558 Method and apparatus for pre-clocking |
| 05/20/2008 | US7375557 Phase-locked loop and method thereof and a phase-frequency detector and method thereof |
| 05/14/2008 | CN101178424A Dynamic data compression storage method in electric network wide-area measuring systems (WAMS) |
| 05/14/2008 | CN101178418A Volt-ampere phase meter with no influence from harmonic |
| 05/13/2008 | US7373265 Data storage device and a method of reading data in a data storage device |
| 05/13/2008 | US7372879 Wavelength locker using modulator current and photodetector |
| 05/13/2008 | US7372246 Phase identification system and method |
| 05/08/2008 | WO2008053562A1 Phase difference detector and phase difference detecting method |
| 05/07/2008 | CN100386642C Monitoring device of power generator real time power angle |
| 05/01/2008 | US20080100280 Method And Device For Measuring With Synchronous Detection And Correlated Sampling |
| 04/24/2008 | US20080097709 Apparatus and method for rangings and noise reduction of low coherence interferometry lci and optical coherence tomography oct signals by parallel detection of spectral bands |
| 04/15/2008 | US7360005 Software programmable multiple function integrated circuit module |
| 04/09/2008 | CN101158709A Accumulator cell real time on-line nondestructive accurate measurement method |
| 04/08/2008 | US7355457 Frequency synthesizer |
| 04/08/2008 | US7355379 Coaxial type impedance matching device and impedance detecting method for plasma generation |
| 03/26/2008 | CN101149404A Specific phase position detecting circuit and specific phase position detecting method |
| 03/20/2008 | WO2008003397A3 Device and method for high resolution time measurements |
| 03/20/2008 | US20080072200 Method and Radiation Hardened Phase Frequency Detector for Implementing Enhanced Radiation Immunity Performance |
| 03/20/2008 | US20080068002 Specific phase position detection |
| 03/06/2008 | US20080059090 Capacitance measurement method employing floating gate of semiconductor device |
| 03/06/2008 | US20080054947 Semiconductor memory apparatus |
| 03/05/2008 | EP1895662A1 Phase correcting circuit |
| 03/05/2008 | CN101135704A Microelectron mechanical microwave signal phase detector and method for preparing the same |
| 03/04/2008 | US7340356 Method and system for reading the resistance state of junctions in crossbar memory |
| 03/04/2008 | US7339365 Phase detector and method of phase detection |
| 02/28/2008 | US20080048726 Signal Integrity Measurement Systems and Methods Using a Predominantly Digital Time-Base Generator |
| 02/28/2008 | US20080048640 Methods for detecting and classifying loads on AC lines |
| 02/27/2008 | EP1892533A1 Time interval measuring apparatus and jitter measuring apparatus using the same |
| 02/26/2008 | US7337083 Process for identification of the direction of rotation of two periodic electrical signals at the same frequency |
| 02/26/2008 | US7336702 Jitter detecting apparatus and phase locked loop using the detected jitter |
| 02/26/2008 | US7336106 Phase detector and method having hysteresis characteristics |
| 02/21/2008 | US20080042690 Data receiving apparatus using semi-dual reference voltage |
| 02/20/2008 | EP1890417A1 Digital phase discrimination based on frequency sampling |
| 02/20/2008 | EP1200925B1 System and method for frequency compensation in an energy meter |
| 02/19/2008 | US7333904 Method of determining FET junction temperature |
| 02/14/2008 | US20080036504 Constant Phase Angle Control for Frequency Agile Power Switching Systems |
| 02/14/2008 | US20080036446 Electrical phase checking apparatus and method of metering |
| 02/07/2008 | WO2008014582A1 Producing a phasor representation of an electrical entity in a multiphase ac electric power system |
| 02/07/2008 | CA2658954A1 Producing a phasor representation of an electrical entity in a multiphase ac electric power system |
| 02/06/2008 | CN101118265A Process for real time recognizing voltage stability of electrified wire netting trough recognizing weak links of electric network |
| 02/06/2008 | CN100367038C Method and apparatus for synchronous phase measurement by employing optical signals |
| 01/30/2008 | CN101114152A Phase detecting device, phase control device including the phase detecting device, and fuser control device including the phase control device |
| 01/29/2008 | US7325171 Measurement and data acquisition system including a real-time monitoring circuit for implementing control loop applications |
| 01/24/2008 | US20080021664 Current-Based Method and Apparatus for Detecting and Classifying Arcs |
| 01/24/2008 | US20080018322 Phase Measurement Device, Method , Program, And Recording Medium |
| 01/23/2008 | EP0801745B1 Measuring method for determining the amplitude and phase of the fundamental tone of an alternating voltage |
| 01/17/2008 | WO2008008949A2 Signal integrity measurement systems and methods using a predominantly digital time-base generator |
| 01/08/2008 | US7317999 Method of mapping linearly spaced spectrum points to logarithmically spaced frequency and a measuring apparatus using the method |
| 12/27/2007 | US20070296396 Phase Difference Measurement Circuit |
| 12/26/2007 | CN101093234A Amplitude calculation apparatus of output signal of encoder and amplitude calculation program of output signal of encoder |
| 12/19/2007 | CN200993665Y Small digitalized prase-comparing measuring device |
| 12/18/2007 | US7310583 System and method of measurement and processing of electrical variables |
| 12/13/2007 | US20070285132 Fast locking phase locked loop |
| 12/13/2007 | US20070285082 Lock Detecting Circuit, Lock Detecting Method |
| 12/12/2007 | EP1021885B1 Digital phase discrimination based on frequency sampling |
| 12/12/2007 | CN200989927Y Long-distance digital nuclear phase system |
| 12/12/2007 | CN200989926Y Radio digital nuclear phase system |
| 12/05/2007 | CN101082649A Method for testing three phases power supply of flying vehicle and tool set |
| 12/05/2007 | CN101082642A Method and device for sampling electric signals of a multiphase electric installation |
| 12/04/2007 | US7304510 Digital phase detector improving phase detection resolution thereof |
| 11/29/2007 | WO2007025232A3 System and method for improving time domain processed sensor signal output |
| 11/22/2007 | US20070271052 Method and apparatus for measuring duty cycle based on data eye monitor |
| 11/22/2007 | US20070271051 Method and apparatus for measuring the duty cycle of a digital signal |
| 11/15/2007 | DE102005044194B4 Messvorrichtung und Verfahren zum Messen von relativen Phasenlagen von digitalen Signalen Measuring apparatus and method for measuring relative phase positions of digital signals |
| 11/14/2007 | CN200976496Y AC power switch apparatus |
| 11/07/2007 | CN200972494Y High precision frequency-measurement phase-measurement circuit |
| 11/06/2007 | US7292946 Integrated PC card host controller for the detection and operation of a plurality of expansion cards |
| 10/31/2007 | DE102006009728A1 Verfahren und Vorrichtung zur Lastdetektion an einer Festkörperaktor-Antriebsvorrichtung Method and apparatus for detecting load on a solid-state actuator drive device |
| 10/25/2007 | US20070247139 Method And System For Detecting The Phase Of Wiring Of An Unknown Phase Voltage Relative To A Reference Phase Voltage |
| 10/24/2007 | CN101059542A Method and circuit for measuring same-frequency signal phase difference using fixed phase shift |
| 10/23/2007 | US7285999 Circuit for use in frequency or phase detector |
| 10/17/2007 | CN100343681C Self adaptive phasor calculating method |
| 10/16/2007 | US7283003 Reset signal generators for a frequency-phase detector and methods of generating reset signals for the same |
| 10/16/2007 | US7282962 Inverted-phase detector |
| 10/11/2007 | DE102004064023B4 Adjustable signal delay circuit comprises a two signal delay members, delay measurement member, subtractor and amplifer connected to permit delay adjustment and control |
| 10/10/2007 | CN101051456A Audio frequency phase detecting and automatic correcting device |
| 10/09/2007 | US7280929 Method and apparatus for pulse I-V semiconductor measurements |
| 10/09/2007 | US7279938 Delay chain integrated circuits having binary-weighted delay chain units with built-in phase comparators therein |
| 10/04/2007 | WO2007111980A1 Method and apparatus for high resolution measurement of signal timing |
| 10/04/2007 | DE10234662B4 Verfahren zur digitalen Phasendetektion und digitaler Phasendetektor zur Durchführung des Verfahrens A method of digital phase detection and digital phase detector for carrying out the method |
| 10/03/2007 | EP1841059A1 Phase comparator |
| 10/03/2007 | CN101046489A 相位检测器 Phase detector |
| 10/02/2007 | US7277804 Method and system for performing effective resistance calculation for a network of resistors |