| 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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| 04/29/2010 | DE102007031866B4 Prüfvorrichtung, Verschiebungsbetrag-Messvorrichtung, Verschiebungsbetrag-Messverfahren und diagnostisches Verfahren Tester, shift amount measuring device, shift amount measuring method and a diagnostic procedure |
| 04/27/2010 | US7705582 Broadband micro-machined thermal power sensor |
| 04/21/2010 | CN201440449U Combiner with phase detection function |
| 04/20/2010 | US7702702 Signal processing device for computing phase difference between alternating current signals |
| 04/20/2010 | US7701196 Methods for detecting and classifying loads on AC lines |
| 04/15/2010 | WO2010041163A2 Phase frequency to digital converter |
| 04/08/2010 | US20100085035 Method and apparatus for determining AC voltage waveform anomalies |
| 04/08/2010 | DE10351416B4 Verfahren zur Erzeugung von hochfrequenten, sinusförmigen, frequenzmäßig sehr dicht benachbarten Signalen A method for generating high-frequency sinusoidal frequency-very closely spaced signals |
| 04/08/2010 | DE10239800B4 Phasendigitalisierer Phasendigitalisierer |
| 04/07/2010 | CN101692104A Power quality and synchronized phasor monitoring device for power system |
| 03/31/2010 | CN101685113A Method and device for measuring phase shift |
| 03/25/2010 | US20100072980 Method and apparatus for current measurement in an electrical network, in particular a multiphase electrical network |
| 03/25/2010 | US20100072979 Method for testing a variable digital delay line and a device having variable digital delay line testing capabilities |
| 03/24/2010 | CN100595596C Dynamic data compression storage method in electric network wide-area measuring systems (WAMS) |
| 03/17/2010 | CN101673954A Phase-locked loop and phase locking method of grid voltage phase measurement in grid-connection |
| 03/17/2010 | CN101672877A Amplitude-modulated signal accompanying phase modulation measurement method based on vector analysis |
| 03/11/2010 | US20100061490 Timing Phase Detection Using a Matched Filter Set |
| 03/11/2010 | US20100060259 Determining Electric Grid Endpoint Phase Connectivity |
| 03/10/2010 | EP1756594B1 Method and apparatus for detecting the wiring phase of an arbitrary unknown phase voltage relative to a reference phase voltage |
| 03/04/2010 | WO2010024835A1 System and method for precision phase shift measurement |
| 03/04/2010 | US20100057390 System and method for precision phase shift measurement |
| 03/02/2010 | US7671671 Device and method for the demodulation of modulated electric signals |
| 02/25/2010 | US20100045261 Design for testability technique for phase detectors used in digital feedback delay locked loops |
| 02/24/2010 | CN201413569Y Wireless power transmitter |
| 02/24/2010 | CN101655521A Pulse phase difference detecting circuit and a/d converter using the same |
| 02/23/2010 | US7668675 Semiconductor integrated circuit and information processing system |
| 02/02/2010 | US7656147 Method and apparatus for measuring pulse widths of a side-band signal |
| 01/28/2010 | US20100019800 Vernier phase error detection method |
| 01/28/2010 | DE102008034483A1 Phase detector for detecting phase angle between phase-modulated and reference signals, has bistable trigger circuit controlled with phase-modulated and reference signals whose frequencies amount to preset portion of source signal |
| 01/26/2010 | US7652464 RF power sensor with chopping amplifier |
| 01/20/2010 | CN201388065Y Quasi-synchronization device applying software and hardware frequency measuring and phase measuring combined technology |
| 01/20/2010 | CN201387442Y Digital double-clamp phase volometer |
| 01/19/2010 | CA2227933C Phasing and indicator arrangements for switchgear or the like |
| 01/14/2010 | US20100007330 Hand-held phase-shift detector for sensor applications |
| 01/13/2010 | CN201382975Y Phase noise tester |
| 01/07/2010 | US20100001764 Configurable Differential Lines |
| 12/31/2009 | US20090322578 Apparatus and methods for direct quadrature sampling |
| 12/29/2009 | US7638997 Phase measurement apparatus |
| 12/29/2009 | US7638341 Non-contact systems for assessing water content properties in bulk tissue, and identifying medical conditions associated with abnormal tissue water content properties; does not require galvanic coupling between the electrode and the skin or the tissue under measurement; non-invasive |
| 12/24/2009 | US20090315549 Method for processing sensor signals subject to an offset and sensor arrangement designed to carry out the method |
| 12/23/2009 | CN201368904Y Real-time dynamic monitoring and recording device of power system |
| 12/23/2009 | CN101609136A Voltage transformer secondary voltage drop tester and phase-angle difference testing method thereof |
| 12/22/2009 | CA2551743C A method for measuring the operating state of synchronous motor by using composite power angle meter |
| 12/17/2009 | US20090309612 Method and apparatus for determining circular characteristic |
| 12/16/2009 | EP2133702A1 Synchronous phasor measuring device and inter-bus phase angle difference measuring device employing it |
| 12/16/2009 | CN101603985A Method for measuring sine signal with high accuracy |
| 12/08/2009 | US7630846 Design for testability technique for phase detectors used in digital feedback delay locked loops |
| 12/08/2009 | US7629816 Method and apparatus for pre-clocking |
| 12/02/2009 | CN101595390A Synchronous phasor measuring device and inter-bus phase angle difference measuring device employing it |
| 11/25/2009 | EP2124068A1 Ac electric quantity measuring device |
| 11/25/2009 | CN101587159A Power distribution network outgoing feeder fault route selecting method by S transform amplitude detection |
| 11/25/2009 | CN101587147A Method for executing phasor correcting for synchronous phasor measuring apparatus |
| 11/25/2009 | CN101587143A CT charge on-line detection device and detection method |
| 11/24/2009 | US7622960 Metastable-resistant phase comparing circuit |
| 11/19/2009 | WO2009140115A1 Fractional samples to improve metering and instrumentation |
| 11/19/2009 | US20090284247 Digital signal delay measuring circuit and digital signal delay measuring method |
| 11/19/2009 | CA2719542A1 Fractional samples to improve metering and instrumentation |
| 11/18/2009 | CN101583047A System and method for generating reset signal |
| 11/18/2009 | CN100561237C Wide-area power-angle monitoring method in electric net wide-area measuring system (WAMS) |
| 11/17/2009 | US7619422 Centralized HIRF detection system |
| 11/11/2009 | EP2116856A2 Method for correcting errors in an electricity measurement in a multi-phase electricity network |
| 11/11/2009 | CN201344961Y Remote wireless security monitoring device for distributed lightening arresters |
| 11/11/2009 | CN101576611A Method for monitoring current sensor angular difference online based on kernel independent component analysis |
| 11/11/2009 | CN101576586A Phase detection method based on adaptive filtering |
| 11/11/2009 | CN101576583A Method for testing voltage ratio of transformer with phase-shifting winding |
| 11/10/2009 | US7617059 Method and apparatus for measuring the duty cycle of a digital signal |
| 11/10/2009 | US7616065 System and method for charge-pump with phase-frequency detection capability |
| 11/05/2009 | US20090273371 Phase comparator, phase synchronizing circuit, and phase-comparison control method |
| 11/04/2009 | EP2113776A1 Frequency measuring instrument |
| 10/28/2009 | CN100554978C Amplitude calculation apparatus of output signal of encoder and amplitude calculation method |
| 10/22/2009 | US20090261779 Transmission line directional awareness |
| 10/15/2009 | WO2009126811A2 Transmission line directional awareness |
| 10/15/2009 | DE102008018388A1 Method for automatic detection of load attached to dimmer and for automatic assignment of control method by dimmer, involves testing dimmer at point of time between application of phase angle-control signal to load and current zero-point |
| 10/14/2009 | CN201327508Y Phasing power-utilization judging device |
| 10/07/2009 | CN101551640A PMU synchronized clock system added by dynamic compensation |
| 10/07/2009 | CN101551419A Method and system for detecting phase noise |
| 10/07/2009 | CN101551418A Method for detecting phase difference between two channels of square wave input signals by using D trigger |
| 10/01/2009 | WO2009119076A1 Measuring apparatus, parallel measuring apparatus, testing apparatus, and electronic device |
| 10/01/2009 | US20090243661 System and method to detect order and linearity of signals |
| 09/30/2009 | CN101545930A Phase detection method based on only amplitude detection |
| 09/30/2009 | CN101545929A Phase detection method based on only amplitude detection |
| 09/24/2009 | US20090237115 Single-phase 3-wire power line connection determination apparatus and connection determination method |
| 09/23/2009 | EP2104401A1 Zero crossing detection of line voltage/current of variable amplitude |
| 09/22/2009 | US7593824 System and method for automation of hardware signal characterization and signal integrity verification |
| 09/09/2009 | EP1450170B9 Phase detector capable of detecting an accumulated value of phase displacement at a high speed and frequency stability measurement apparatus for arbitrary nominal frequency using the same |
| 09/09/2009 | CN101526562A Distributed wireless high-voltage equipment insulating live testing system and testing method |
| 09/08/2009 | US7586335 Digital phase detector and a method for the generation of a digital phase detection signal |
| 08/27/2009 | US20090212762 Phase detector system |
| 08/26/2009 | CN101515006A Method for measuring nonlinear susceptibility of materials |
| 08/26/2009 | CN101515003A Method for measuring surface charge density of materials |
| 08/19/2009 | CN101512871A Phasor representation for generating electric entity of polyphase AC electric power system |
| 08/19/2009 | CN101509943A Phase detecting method and apparatus |
| 08/11/2009 | US7574314 Spurious signal detection |
| 08/05/2009 | CN101496724A Method and system for distortion compensation |
| 08/05/2009 | CN100523840C Process for real time recognizing voltage stability of electrified wire netting trough recognizing weak links of electric network |
| 07/30/2009 | US20090189596 Signal measuring device |
| 07/30/2009 | DE102006009728B4 Verfahren zur Lastdetektion an einer Festkörperaktor-Antriebsvorrichtung A method for load detection in a solid-state drive device |
| 07/29/2009 | CN100520420C Specific phase position detection circuit and method of the same |
| 07/22/2009 | CN101487861A Detection method for electric voltage phase angle jump at network voltage dip |
| 07/21/2009 | US7564315 System and method for pre-charged linear phase-frequency detector |