| Patents for G01R 25 - Arrangements for measuring phase angle between a voltage and a current or between voltages or currents (2,594) |
|---|
| 12/09/1986 | US4628461 Phase detector |
| 11/18/1986 | US4623873 Digital phase detector |
| 11/05/1986 | EP0200312A1 Phase difference fault detector |
| 10/29/1986 | EP0198879A1 Ultrasonic flow meter with wide measuring range |
| 10/23/1986 | WO1986006174A1 Heterodyne-type method and apparatus for measuring signals, having means for automatically correcting the detuning |
| 10/15/1986 | CN85107511A Non-contact method to obtain the voltage phase signal |
| 09/23/1986 | CA1211802A1 Lock-in amplifiers |
| 09/17/1986 | EP0194643A2 Correlation time-difference detector |
| 08/20/1986 | CN85109713A Load state detecting apparatus of an induction motor |
| 08/19/1986 | US4607218 Digital phase measurement method |
| 08/13/1986 | EP0190578A2 Clock phase discriminator |
| 07/15/1986 | US4600994 Phase difference measuring apparatus |
| 07/15/1986 | CA1207848A1 Ac parametric circuit |
| 07/08/1986 | US4599570 Automatic offset nulling circuit |
| 07/02/1986 | EP0186521A2 Digital phase difference detecting circuit |
| 06/24/1986 | US4596965 Method of and apparatus for determining amplitude ratios and phase differences of signals of the same frequency |
| 06/17/1986 | US4595293 Detection of movement of a cyclic interference waveform, such as in a ring laser gyroscope |
| 06/17/1986 | CA1206202A1 Differential receiver |
| 06/03/1986 | US4593253 Flip-flop phase detector circuit for phase locked loop |
| 05/09/1986 | WO1986002722A1 Ultrasonic flow meter with wide measuring range |
| 05/06/1986 | US4587551 Measurement of SC/H phase |
| 04/16/1986 | CN85201720U Detector for power factor autocompensation |
| 04/09/1986 | EP0177100A2 Phase comparator circuit |
| 02/25/1986 | US4572995 Synchronism discriminating circuit |
| 02/12/1986 | EP0170804A1 Phase difference demodulator |
| 02/12/1986 | CN85201238U Commutating type current phase relay |
| 02/11/1986 | US4569599 Method of determining the difference between the transit times of measuring pulse signals and reference pulse signals |
| 02/05/1986 | EP0169915A1 Digital phase demodulator |
| 01/29/1986 | EP0169321A2 Numerical phase misalignment determination |
| 01/22/1986 | EP0168584A2 Phase synchronism detection device |
| 01/14/1986 | US4564837 Circuit for monitoring the frequency of signal for controlling choppers of electric cars |
| 01/08/1986 | EP0166839A1 Method and device for measuring phase-jitter of a transmission canal |
| 11/06/1985 | EP0160567A2 Phase detector |
| 10/15/1985 | US4547777 Method of radio-position-finding through determination of phases of electromagnetic waves and receiving device for practicing the method |
| 09/24/1985 | US4543600 Digital signal phase measuring apparatus as for a phase-locked loop |
| 09/03/1985 | CA1192954A1 Device for measuring the phase angle between a sine wave signal and cyclic logic signal of the same frequency |
| 08/06/1985 | US4534004 Apparatus and method for determining signal parameters of periodic square wave signals |
| 07/30/1985 | US4532637 Differential receiver |
| 07/02/1985 | US4527126 AC parametric circuit having adjustable delay lock loop |
| 07/02/1985 | US4527080 Digital phase and frequency comparator circuit |
| 06/26/1985 | EP0146216A1 Improvements relating to phase detecting apparatus for use in synchronising systems |
| 05/28/1985 | US4520449 Phase angle detector |
| 05/28/1985 | US4520321 Phase difference detector with phase inversion of one input signal when phase difference is small |
| 03/19/1985 | US4506333 Device for measuring the phase angle between a sine wave signal and a cyclic logic signal of the same frequency |
| 03/19/1985 | US4506175 Digital phase comparator circuit producing sign and magnitude outputs |
| 02/26/1985 | US4502005 Method and apparatus for determining the angle between the air-gap flux vector and the stator current vector of an asynchronous machine fed from an intermediate current-link frequency converter |
| 02/19/1985 | US4499760 Device and process for high-precision measurement of the phase relationship and phase displacement, respectively, of two pulse trains |
| 01/09/1985 | EP0130717A1 Apparatus for displaying the phase and amplitude of a chrominance signal |
| 01/08/1985 | US4492918 High voltage power line phase angle and current measuring instrument |
| 01/08/1985 | CA1180772A1 Detector for time difference between transitions in two wave forms |
| 12/19/1984 | EP0128804A1 Method of processing radio-electrical signals for radio navigation, and receiver for carrying out the method |
| 12/18/1984 | CA1179743A1 Phase comparator |
| 12/11/1984 | US4488108 Phase detector error compensation apparatus |
| 12/04/1984 | US4486706 Power flow direction detector |
| 10/24/1984 | EP0122491A1 Digital phase detector |
| 10/17/1984 | EP0121732A1 Process for digital phase measurement |
| 09/26/1984 | EP0119711A1 Lock-in amplifiers |
| 09/11/1984 | US4471299 Circuit for digital phase difference measuring and synchronizing between pulse trains |
| 08/08/1984 | EP0115151A2 Phase difference measurement receiver |
| 07/24/1984 | US4462011 Low drift relative phase sensor employing surface acoustic waves |
| 07/10/1984 | US4459543 Automatic phase compensation circuit |
| 05/29/1984 | US4451794 Phase comparator |
| 03/20/1984 | US4438393 Phase-metering device |
| 03/06/1984 | US4435657 Phase detector circuit |
| 02/21/1984 | US4433300 FM Demodulator including automatic threshold control circuit |
| 02/14/1984 | CA1162301A1 Time division multiplier transducer with selective phase shift |
| 01/24/1984 | US4427947 Phase discriminator circuit |
| 01/17/1984 | US4426620 Analog quadrature signal to phase angle data conversion by a quadrature digitizer and quadrature counter |
| 01/10/1984 | US4425543 High stability buffered phase comparator |
| 12/06/1983 | US4419624 Apparatus for phase measurement |
| 11/02/1983 | EP0092676A2 Time measuring method and device for carrying it out |
| 10/25/1983 | US4412299 Phase jitter detector |
| 10/04/1983 | US4408165 Digital phase detector |
| 09/07/1983 | EP0087700A1 System for detecting a predetermined phase relation between two input electrical quantities detected from an electric power system |
| 08/31/1983 | EP0087025A2 Method and device for the high-precision measuring of the phase position and phase shift of two pulse trains |
| 08/24/1983 | EP0086409A1 Method and device for the high-precision measuring of the phase position and phase shift of two pulse trains |
| 08/23/1983 | US4400664 Digital phase detector |
| 07/19/1983 | US4394618 Digital tracking phase meter |
| 07/12/1983 | CA1149870A1 Phase-shift detector |
| 05/31/1983 | CA1147402A1 Time jitter determining apparatus |
| 04/05/1983 | US4379264 Broadband phase shifter |
| 04/05/1983 | US4379221 Circuit for detecting phase relationship between two signals |
| 02/09/1983 | EP0071504A1 Device for measuring the phase angle between a sine signal and a periodic logic signal of the same frequency |
| 01/25/1983 | US4370650 Tone detection circuitry |
| 01/25/1983 | US4370574 Detector for time difference between transitions in two wave forms |
| 01/25/1983 | CA1140218A1 Phase discriminator |
| 12/15/1982 | EP0066681A1 Process for measuring a magnitude corresponding to the duty cycle of a periodic square-wave electrical signal and process for measuring the phase angle between two periodic square-wave electrical signals in quadrature and devices for carrying out said processes |
| 12/14/1982 | CA1137568A1 Digital phase comparator circuit |
| 10/26/1982 | US4356446 Time division multiplier transducer with selective phase shift |
| 10/12/1982 | US4354124 Digital phase comparator circuit |
| 10/06/1982 | EP0061853A1 Tone detection circuitry |
| 10/06/1982 | EP0061603A2 Method and device for measuring the angle between the flux vector in the air gap and the vector of the stator current of an asynchronous machine fed by a current indirect converter |
| 10/05/1982 | CA1133102A1 Vital power varistor circuit for railroad signaling systems |
| 09/30/1982 | WO1982003276A1 Time division multiplier transducer with selective phase shift |
| 09/21/1982 | US4350879 Time jitter determining apparatus |
| 09/14/1982 | US4349756 Phase detector with low offsets |
| 09/02/1982 | WO1982002987A1 Phase detector with low offsets |
| 09/01/1982 | EP0059138A1 Method of radio-localisation by determining the phases of electromagnetic waves, and receiver apparatus therefor |
| 08/24/1982 | CA1130382A1 Digital phase detector and method |
| 07/27/1982 | US4341999 High accuracy phase shift control system |