| 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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| 06/29/1982 | US4337435 Digital phase sequence detector |
| 06/29/1982 | CA1126865A1 Programmable digital tone detector |
| 06/08/1982 | CA1125435A1 Method of and apparatus for phase-sensitive detection |
| 06/01/1982 | CA1124793A1 Multiperiodic phasemeter |
| 03/23/1982 | US4321565 Relative phase sensor employing surface acoustic waves |
| 03/17/1982 | EP0047673A1 Phase discriminator circuit |
| 02/16/1982 | US4316254 Portable phase angle meter instrument |
| 01/13/1982 | EP0043407A2 Arrangement for the digital measuring of phase difference |
| 01/06/1982 | EP0043293A1 Digital phase detector |
| 01/05/1982 | US4309702 Displacement detecting apparatus |
| 12/22/1981 | US4307401 Two-channel receiver-indicator for phase radio systems |
| 12/22/1981 | US4307346 Phase detecting circuit |
| 12/16/1981 | EP0041809A2 Digital phase sequence detector |
| 12/08/1981 | US4305040 Phase detection system |
| 12/01/1981 | US4303881 Multi-function A.C. power meter |
| 11/10/1981 | US4300092 Phase match measuring system |
| 11/10/1981 | US4300039 Incremental encoder |
| 10/20/1981 | US4296445 Phase sensor |
| 10/13/1981 | CA1110715A1 Digital phase comparison apparatus |
| 09/22/1981 | US4291274 Phase detector circuit using logic gates |
| 08/04/1981 | US4282482 Method and apparatus for phase detection having a narrow dead band and a linear output |
| 07/28/1981 | CA1106025A1 Displacement detecting apparatus |
| 07/14/1981 | US4278903 Phase comparison circuit |
| 07/07/1981 | US4277748 Angle digitizer |
| 06/30/1981 | CA1104260A1 Method for digital interpolation of a period of a three-phase analog signal |
| 04/28/1981 | US4264866 Frequency and phase comparator |
| 03/25/1981 | EP0025477A2 Method and arrangement for measuring the jitter of pulse signals in digital transmission systems |
| 03/10/1981 | US4255743 Method for digital interpolation of a period of a three-phase analog signal |
| 02/11/1981 | EP0023735A1 Circuit arrangement for comparing two alternating voltages of the same frequency |
| 02/10/1981 | US4250454 Electronic trigger for a radio frequency source |
| 01/27/1981 | US4247898 Apparatus for computing the change in bearing of an object |
| 01/20/1981 | US4246497 Phase measuring circuit |
| 01/13/1981 | US4245192 Periodicity verification circuit |
| 12/02/1980 | US4237423 Digital phase detector |
| 09/09/1980 | CA1085459A1 Digital phase and frequency meter |
| 08/26/1980 | US4219784 Phase detection system using sample and hold technique, and phase locked loop using such phase detection system |
| 08/05/1980 | US4216463 Programmable digital tone detector |
| 05/06/1980 | US4201945 Phase comparing apparatus |
| 04/08/1980 | CA1075311A1 Electronic phase comparison apparatus for the remote measurement of layer thickness |
| 02/20/1980 | EP0008160A1 Programmable digital tone detector |
| 02/12/1980 | US4188002 Vital power varistor circuit for railroad signaling systems |
| 01/15/1980 | US4184122 Digital phase comparison apparatus |
| 01/09/1980 | EP0006492A1 Method of digital interpolation of one period of a three-phased analog signal |
| 01/08/1980 | CA1069592A1 Digital phase comparator |
| 01/01/1980 | US4181949 Method of and apparatus for phase-sensitive detection |
| 12/11/1979 | US4178631 Digital phase detector and method |
| 12/11/1979 | US4178560 Phase comparator arrangement for controlling an electrical member |
| 06/19/1979 | CA1056912A1 Phase comparator and process for the operation thereof |
| 06/05/1979 | US4157500 Multiperiodical phasemeter |
| 03/13/1979 | US4144572 Accurate phase-measuring system using arithmetic synthesis |
| 01/16/1979 | CA1046593A1 Phase and/or frequency comparators with extended phase detection range |
| 01/02/1979 | US4133037 System and method of performing a decisive phase coherence test |
| 12/05/1978 | US4128812 Phase discriminator |
| 10/10/1978 | US4119910 Method and apparatus for detecting whether phase difference between two signals is constant |
| 09/26/1978 | US4117408 Apparatus for indicating the loading of an electric ac motor |
| 05/30/1978 | US4092724 Polar converter |
| 05/09/1978 | US4088950 Immittance monitoring apparatus |
| 04/18/1978 | US4085362 Check synchronism |
| 04/11/1978 | US4084133 Method of and apparatus for determining the direction of the mutual temporal shift of at least two similar stochastic signals |
| 03/07/1978 | US4078201 Oscillator circuit for generating a signal whose frequency is representative of the phase shift of a four terminal network |
| 02/21/1978 | US4075698 Digital phase measurement system |
| 02/21/1978 | US4075555 Electronic phase comparison apparatus for the remote measurement of layer thickness |
| 02/14/1978 | US4074174 Controlling apparatus for asynchronous motors with wound rotor |
| 01/31/1978 | US4071821 Quadrature correlation phase determining apparatus |
| 01/24/1978 | US4070618 Digital phase and frequency meter |
| 01/10/1978 | US4068181 Digital phase comparator |
| 01/03/1978 | US4066952 Phase measuring apparatus |
| 12/27/1977 | US4065665 Method and apparatus for the determination of start time difference and overall phase shift between two signals |
| 08/02/1977 | US4039859 Phase comparator and process for the operation thereof |
| 07/26/1977 | US4038540 Quadrature correlation pulse detector |
| 05/24/1977 | US4025848 Waveform comparing phasemeter |
| 05/03/1977 | US4020685 Phasemeters |
| 04/26/1977 | US4020422 Or frequency comparators |
| 04/19/1977 | US4019039 Synchroscope simulator |
| 04/12/1977 | US4017801 Low frequency triangular waveform generator |
| 03/08/1977 | US4011503 Apparatus for measuring the phase relation of two alternating current signals |
| 01/04/1977 | US4001682 Ambiguity free digital averaging phase meter |
| 01/04/1977 | US4001681 Vector voltmeter |
| 11/23/1976 | US3993946 Apparatus for measuring the direction and relative position between a body and a pick-up using a magnetoresistive pick up |
| 11/23/1976 | US3993044 Method and device for determining the length of a root canal of a tooth |
| 10/12/1976 | US3986128 Phase selective device |
| 10/12/1976 | US3986113 Two channel test instrument with active electronicphase shift means |
| 10/05/1976 | US3984771 Accurate digital phase/frequency extractor |
| 10/05/1976 | US3984762 Method for determining battery state of charge by measuring A.C. electrical phase angle change |
| 09/21/1976 | US3982184 Phase different detector and display |
| 09/14/1976 | US3980948 System and process for locating sources of radiation |
| 07/20/1976 | US3970868 Phase comparator |
| 07/06/1976 | US3968493 Digital phase comparators |
| 07/06/1976 | US3968353 Apparatus for determining the phase difference between the rolling oscillation of a ship and a liquid contained in a stabilizing tank |
| 06/01/1976 | US3961255 Measurement bandwidth enhancement in phase lock loops |
| 04/27/1976 | US3953794 Digital phase detector |
| 03/30/1976 | US3947775 Phase and frequency comparator |
| 03/16/1976 | US3944938 Phase correlator |
| 02/24/1976 | US3940693 Phase sensitive detector |