| 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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| 09/28/2005 | EP1580893A1 Device and method for phase detection of a signal |
| 09/22/2005 | US20050207484 Device and method for detecting the phase of a signal |
| 09/20/2005 | US6947508 Method and apparatus for estimating the frequency and/or phase of a digital signal |
| 09/15/2005 | US20050200854 Motion compensation in biomagnetic measurement |
| 09/08/2005 | DE10354224A1 Digital phase difference measurement circuit has oscillator circuit with gates, delay device that feeds delayed clock signal back to second gate, counter circuit connected to oscillator circuit output to produce phase difference signal |
| 09/01/2005 | US20050190874 Variable phase bit sampling with minimized synchronization loss |
| 09/01/2005 | DE10244413B4 Vorrichtung und Verfahren zur Messung einer Phasenverschiebungskennlinie Apparatus and method for measuring a phase shift characteristic |
| 08/30/2005 | US6937950 Animated graphical object notification system |
| 08/11/2005 | WO2005073738A1 Phase measurement device, method, program, and recording medium |
| 08/03/2005 | EP1560360A2 Variable phase bit sampling with minimized synchronization loss |
| 08/03/2005 | CN1648676A Self adaptive phasor calculating method |
| 08/02/2005 | CA2495135A1 Variable phase bit sampling with minimized synchronization loss |
| 07/21/2005 | WO2005066648A1 A method for measuring the operating state of a synchronous motor using composite power angle meter |
| 07/14/2005 | US20050154545 Method and apparatus for identifying an operational phase of a motor phase winding and controlling energization of the phase winding |
| 07/14/2005 | US20050151532 Synchronous vector measuring device |
| 07/05/2005 | US6914439 Capacitive test point voltage and phasing detector |
| 06/29/2005 | CN2706769Y Frequency change power frequency phase detector |
| 06/22/2005 | CN1207679C Synchronous phasor measuring method for compensating cyclic discrete Fourier transformation error |
| 06/21/2005 | US6909270 Phase detector capable of detecting an accumulated value of phase displacement at a high speed and frequency stability measuring apparatus for arbitrary nominal frequency using the same |
| 06/16/2005 | WO2005054778A1 Digital phase detector for periodically alternating signals |
| 06/16/2005 | CA2543581A1 Digital phase detector for periodically alternating signals |
| 06/15/2005 | CN1627087A Electric power meter |
| 06/09/2005 | US20050125177 Wavelength locker using modulator current and photodetector |
| 06/08/2005 | EP1538450A1 Electrical power meter |
| 06/02/2005 | US20050117404 Linear half-rate phase detector and clock and data recovery circuit |
| 05/26/2005 | US20050111606 Digital phase detector for periodically alternating signals |
| 05/19/2005 | US20050104611 Device for measuring supply voltage and method thereof |
| 05/18/2005 | CN1618092A Scaling persistence data with interpolation |
| 05/12/2005 | US20050102391 Method and apparatus providing an asymmetric ping procedure |
| 05/11/2005 | EP1200925A4 System and method for frequency compensation in an energy meter |
| 05/10/2005 | US6891362 Method and apparatus for estimating the phase of a signal |
| 04/27/2005 | CN2695979Y Three-pincers graphic phase voltammeter |
| 04/12/2005 | US6879918 Method and apparatus for measuring the transmission loss of a cable |
| 04/06/2005 | EP1454311A4 Scaling persistence data with interpolation |
| 04/06/2005 | EP1021885A4 Digital phase discrimination based on frequency sampling |
| 04/05/2005 | US6876185 PLL semiconductor device with testability, and method and apparatus for testing same |
| 03/16/2005 | CN1595181A Method and apparatus for synchronous phase measurement by employing optical signals |
| 03/15/2005 | US6868376 Debug bi-phase export and data recovery |
| 03/03/2005 | DE10112939B4 Verfahren zur Anzeige und/oder Kontrolle des Füllstandes eines internen Speichers (Buffers) eines Schreibers für Datenträger A method for displaying and / or control of the level of an internal memory (buffer) a writer for media |
| 02/22/2005 | US6859025 Measurement of quantities of electric line |
| 02/16/2005 | CN1581691A Integrated circuit, method and apparatus for fine tuning clock signals of an integrated circuit |
| 02/08/2005 | US6854068 Wander generator having arbitrary TDEV mask characteristic setting apparatus |
| 02/03/2005 | US20050024037 Method and circuit for measuring on-chip, cycle-to-cycle clock jitter |
| 01/26/2005 | EP1500026A2 Fault tolerant apparatus and method for determining a revolution rate of a gear |
| 01/25/2005 | US6847789 Linear half-rate phase detector and clock and data recovery circuit |
| 01/25/2005 | US6847238 Output circuit and method for reducing simultaneous switching output skew |
| 01/19/2005 | CN1185496C Method for pure electrical measuring no-load potential phasor of synchronous electric generator |
| 01/13/2005 | WO2005003794A1 Device and method for determining relative phase displacement between a current and voltage |
| 01/12/2005 | EP1336111B1 Method and apparatus for estimating the phase of a signal |
| 01/11/2005 | US6841985 Method and circuit for measuring on-chip, cycle-to-cycle clock jitter |
| 01/11/2005 | CA2146174C High precision rf vector analysis system based on synchronous sampling |
| 01/05/2005 | EP1494035A1 Apparatus and method for determining the relative phase shift between a current and a voltage |
| 12/14/2004 | US6832171 Circuit and method for determining battery impedance increase with aging |
| 12/07/2004 | US6829548 DLL static phase error measurement technique |
| 12/02/2004 | US20040243326 Method and apparatus for measuring the transmission loss of a cable |
| 11/23/2004 | US6823275 Fault tolerant apparatus and method for determining a revolution rate of a gear |
| 11/23/2004 | US6822483 No resonance mode bang-bang phase detector |
| 11/11/2004 | US20040222778 Method for the precise measurement of dependency on amplitude and phase of a plurality of high frequency signals and a device for carrying out said method |
| 11/10/2004 | EP1475641A2 Method and device for precise measurement of dependency on amplitude and phase of plurality of high frequency signals |
| 11/04/2004 | DE10357244A1 System und Verfahren zum Kalibrieren von symmetrischen Signalen System and method for calibrating of balanced signals |
| 10/19/2004 | US6806742 Phase detector for low power applications |
| 10/12/2004 | US6803753 Frequency phase detector for differentiating frequencies having small phase differences |
| 10/07/2004 | WO2004086409A1 Circuit for use in frequency or phase detector |
| 10/07/2004 | US20040199345 DLL Static phase error measurement technique |
| 10/07/2004 | US20040196051 System and method for calibrating balanced signals |
| 09/22/2004 | CN2643326Y Low-frequency time code carrier phase meter |
| 09/21/2004 | US6794857 Apparatus and method for measuring a phase delay characteristic |
| 09/15/2004 | EP1019795B1 Extended resolution phase measurement |
| 09/08/2004 | EP1454311A1 Scaling persistence data with interpolation |
| 08/26/2004 | US20040164777 Comparator |
| 08/25/2004 | EP1450170A1 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 |
| 08/18/2004 | CN2634489Y Circuit device of three-phase power source phase detector |
| 08/12/2004 | US20040158422 Fault tolerant apparatus and method for determining a revolution rate of a gear |
| 08/11/2004 | EP1062521B1 Simultaneous display of primary measurement values and derived parameters |
| 08/05/2004 | US20040150438 Frequency multiplier capable of adjusting duty cycle of a clock and method used therein |
| 08/03/2004 | US6771096 Circuit, system, and method for using hysteresis to avoid dead zone or non-linear conditions in a phase frequency detector |
| 07/28/2004 | EP0990161B1 Two port handheld vector network analyzer with frequency monitor mode |
| 07/28/2004 | CN1159852C Jitter tester and lock phase ring using with tested flutter |
| 07/28/2004 | CN1159592C Digital measuring method of frequency and phase |
| 07/22/2004 | DE4447936B4 Ring oscillator and pulse phase difference encoding circuit |
| 07/01/2004 | US20040128093 Animated graphical object notification system |
| 07/01/2004 | US20040128089 Circuit and method for determining battery impedance increase with aging |
| 06/22/2004 | US6754599 Debug output loosely coupled with processor block |
| 06/16/2004 | EP1226447B1 High resolution skew detection apparatus and method |
| 06/03/2004 | US20040107060 Output circuit and method for reducing simultaneous switching output skew |
| 05/20/2004 | US20040096024 Phase detector capable of detecting an accumulated value of phase displacement at a high speed and frequency stability measuring apparatus for arbitrary nominal frequency using the same |
| 05/13/2004 | WO2003094408A3 Fault tolerant apparatus and method for determining a revolution rate of a gear |
| 05/11/2004 | US6735265 Comparator |
| 04/22/2004 | US20040075449 Capacitive test point voltage and phasing detector |
| 04/20/2004 | US6725391 Clock modes for a debug port with on the fly clock switching |
| 04/14/2004 | CN1488948A Circuit load property and its voltage-current phase difference measuring method and apparatus |
| 04/07/2004 | CN1487300A 相位角测量仪 Phase angle measuring instrument |
| 04/01/2004 | US20040061488 Module, system and method for testing a phase locked loop |
| 03/25/2004 | DE10338859A1 Phase shift measurement method for use with motor vehicle ABS or ESP systems, whereby four sinusoidal voltage values are simultaneously measured and then normalized with respect to amplitude variations |
| 03/23/2004 | US6711513 Fault tolerant apparatus and method for determining a revolution rate of a gear |
| 03/23/2004 | US6710352 Charged particle measuring apparatus |
| 03/09/2004 | US6704672 Method for controlling the status of an internal memory (buffer) and control device for same |
| 02/25/2004 | CN1477401A High-accuracy synchronous phasor measuring method |
| 02/24/2004 | US6696828 Integrated circuit and lot selection system therefor |
| 02/19/2004 | US20040032245 Method and apparatus for estimating the phase of a signal |