| 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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| 09/17/1991 | US5049766 Delay measuring circuit |
| 09/11/1991 | EP0446190A2 Direct phase digitization |
| 09/09/1991 | WO1991014329A1 Direct phase digitization |
| 08/21/1991 | CN1013627B N-pi phase/frequency detector |
| 08/20/1991 | CA1287884C High impedance fault analyzer in electric power |
| 08/14/1991 | CN2082912U 相位监控器 Phase Monitor |
| 07/31/1991 | EP0439178A1 Pulse phase difference encoding circuit |
| 07/30/1991 | US5036230 CMOS clock-phase synthesizer |
| 07/10/1991 | CN2080723U In-phase detector |
| 07/10/1991 | CN2080676U 90 deg. phase detecting and modulating device |
| 06/25/1991 | US5027373 N-pi phase/frequency detector |
| 06/25/1991 | US5027085 Phase detector for phase-locked loop clock recovery system |
| 06/19/1991 | EP0246269B1 Digital phase-frequency discriminator comprising simplified reset means |
| 06/02/1991 | WO1991008493A2 Method and device for comparing two variable analog signals |
| 06/02/1991 | CA2046652A1 Method and device for comparing two variable analog signals |
| 05/28/1991 | US5019786 Phase measurement system using a dithered clock |
| 05/14/1991 | US5016019 Method and apparatus for processing synthetic aperture aerial signals |
| 05/02/1991 | EP0425303A2 Delay measuring circuit |
| 04/18/1991 | WO1991005422A1 Phase detector for phase-locked loop clock recovery system |
| 04/16/1991 | US5008670 Phase/digital conversion method and arrangements for implementing the method |
| 03/27/1991 | CN1012218B Load state detecting apparatus of an induction motor |
| 03/26/1991 | US5003256 Clock skew measurement technique |
| 03/19/1991 | US5001724 Method and apparatus for measuring phase accuracy and amplitude profile of a continuous-phase-modulated signal |
| 03/19/1991 | US5001489 Digital phase detector |
| 02/12/1991 | CA1280177C Phase comparator insensitive to clock asymmetry |
| 01/30/1991 | EP0410022A1 Phase and frequency detector |
| 01/16/1991 | EP0408436A1 Detection circuit for a three-phase alternator phase control signal of a vehicle battery charging regulator and its use |
| 01/15/1991 | US4985683 Circuitry for measuring phase difference between two oscillatory signals |
| 12/19/1990 | CN1010894B Digital phase meter circuit |
| 12/19/1990 | CN1010893B Non-contact voltage phase measuring means |
| 12/18/1990 | US4979215 Method of digitally evaluating the frequency and the phase of signals, and a device for implementing such a method |
| 12/13/1990 | WO1990015482A1 Dual state phase detector having frequency steering capability |
| 12/12/1990 | CN2067410U Angle-of-flow measurer for three phase thyristor |
| 12/05/1990 | EP0400853A2 Contactless measurement of the electrical resistance per unit length of filaments |
| 12/04/1990 | US4975634 Jitter measurement device |
| 11/27/1990 | US4974234 Method of and circuit for the measurement of jitter modulation of zero-related digital signals |
| 11/21/1990 | CN1010538B Device for detecting bit phase difference |
| 11/13/1990 | US4970469 Phase detector and frequency demodulator including such a phase detector |
| 11/08/1990 | DE3913872A1 Phase difference measuring appts. for phase modulated equipment - employs frequency division and multiple comparator modules to extend system range and accuracy |
| 10/31/1990 | CN1046607A Method and arrangement for accurate digital determination of time or phase position of signal pulse train |
| 10/30/1990 | US4967150 Method and apparatus for phase measurement of signals at a measuring point by an unmodulated particle beam |
| 10/24/1990 | EP0394206A2 A method and an arrangement for accurate digital determination of the time or phase position of a signal pulse train |
| 10/21/1990 | WO1990013040A1 A method and an arrangement for accurated digital determination of the time or phase position of a signal pulse train |
| 10/18/1990 | DE3912542A1 Circuit for detecting AC current over large range - has transformer driving bistable circuit with rectangular wave detector |
| 10/16/1990 | US4963817 Method and apparatus for detecting a phase difference between two digital signals |
| 10/09/1990 | US4962384 Microwave antenna apparatus |
| 10/03/1990 | EP0389680A1 Phase detector for mark-space-modulation-type signals |
| 09/25/1990 | US4959617 Dual state phase detector having frequency steering capability |
| 09/25/1990 | US4958638 Non-contact vital signs monitor |
| 09/25/1990 | CA1274587A1 Digital phase-frequency discriminator comprising simplified reset means and associated method |
| 09/20/1990 | DE3907781A1 Method and device for the digital measurement of phase |
| 09/04/1990 | US4954961 Method of digitally evaluating the frequency and the phase of signals, and a device for implementing such a method |
| 09/04/1990 | US4954824 Sample rate conversion system having interpolation function with phase locked clock |
| 08/29/1990 | EP0383761A1 Method and apparatus for processing synthetic aperture aerial signals |
| 08/14/1990 | USRE33301 Synchronism detector circuit |
| 07/25/1990 | EP0379321A2 Phase difference measurement |
| 07/18/1990 | EP0378405A2 Method and apparatus for measuring phase accuracy and amplitude profile of a continuous-phase-modulation signal |
| 07/17/1990 | CA1271855A1 Measurement of sc/h phase |
| 06/19/1990 | US4935692 Vector ammeter having digital signal processing unit |
| 06/12/1990 | CA1270301A1 Device for detecting bit phase difference |
| 06/07/1990 | DE3840855A1 Phase comparator |
| 05/30/1990 | EP0370539A1 Phase detector and frequency demodulator including such a phase detector |
| 05/22/1990 | US4928026 Digital phase comparing circuit |
| 05/15/1990 | US4926115 Unique phase difference measuring circuit |
| 04/11/1990 | EP0362491A2 Method and circuit arrangement for measuring jitter modulation in digital signals containing zeros |
| 03/20/1990 | US4910465 Phase detector |
| 03/07/1990 | CN1007089B Intelligence frequency meter with high-resolution |
| 02/20/1990 | US4902920 Extended range phase detector |
| 02/20/1990 | CA1266098A1 Phase detecting circuit |
| 02/13/1990 | US4901255 Method and apparatus for evaluating quadrature encoders |
| 02/01/1990 | DE3825556A1 Method for determining phase deviation |
| 01/17/1990 | CN1038884A Synchronous phase-angle detector for synchro-generator |
| 12/26/1989 | US4890056 Method and apparatus for error correction of phase measurement signals |
| 12/19/1989 | US4888701 Apparatus for measuring vector voltage ratio |
| 12/06/1989 | CN2048977U Linear phase comparator |
| 11/28/1989 | US4884020 Phase detection system |
| 10/31/1989 | US4878231 N-PI phase/frequency detector |
| 10/24/1989 | US4876699 High speed sampled data digital phase detector apparatus |
| 10/18/1989 | EP0337233A2 Phase difference indicator for sinusoidal components of two signals, possibly distorted by non-linear filtering |
| 10/05/1989 | WO1989009450A1 Method and apparatus for evaluating quadrature encoders |
| 10/04/1989 | EP0335284A2 Phase to digital conversion method and arrangement for carrying out the method |
| 10/03/1989 | US4871971 High impedance fault analyzer in electric power distribution networks |
| 09/28/1989 | DE3832200A1 Circuit arrangement for detecting the coincidence of two squarewave pulse sequences |
| 09/27/1989 | EP0334303A2 Mechanical analysis apparatus with circuitry for processing low frequency signals |
| 09/26/1989 | US4870593 Circuit and method for determining the phase angle of a complex electrical signal |
| 09/19/1989 | US4868512 Phase detector |
| 09/13/1989 | CN1035595A N-pi phase/frequency detector |
| 09/05/1989 | US4864221 Filter, phase-measuring device and method for application of said filter |
| 08/09/1989 | CN2042599U Acoustic / superlow frequency phase meter |
| 08/08/1989 | US4855744 Angle digitizer |
| 08/01/1989 | US4853605 Load state detecting apparatus of an induction motor for controlling the spin dryer of a washing machine |
| 07/26/1989 | EP0325173A2 Measuring circuit for phasemeasuring of pulsed high frequency signals |
| 07/25/1989 | US4851782 High impedance fault analyzer in electric power distribution |
| 07/18/1989 | CA1257661A1 Clock phase discriminator |
| 07/05/1989 | EP0323124A2 Digital phase comparing circuit |
| 07/04/1989 | US4845438 Phase comparison circuit |
| 06/13/1989 | US4839578 Method for removing phase instabilities caused by flexure of cables in microwave network analyzer measurements |
| 05/24/1989 | EP0316543A2 Frequency synthesizer having digital phase detector with optimal steering and level-type lock indication |
| 05/23/1989 | US4833460 Phasing indicator |
| 05/16/1989 | EP0299060A4 High impedance fault analyzer in electric power distribution. |