| 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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| 04/12/1995 | EP0648017A1 Device for monitoring phase skew between two clock signals |
| 04/06/1995 | DE4344867C1 Digital phase detector |
| 04/06/1995 | DE4333271A1 Measuring device for a transmission system |
| 03/09/1995 | WO1995006854A2 Magnetic flowmeter determining flow rate from phase angle difference |
| 03/02/1995 | WO1995006260A1 Measuring burst/sinusoidal waveform time span |
| 02/01/1995 | EP0636891A2 Phase difference detecting method, circuit and apparatus |
| 01/25/1995 | EP0635725A2 Electronic circuit for monitoring the presence of a voltage and for comparing the phase in conductors of electric lines |
| 01/11/1995 | EP0633477A1 Vector measuring appliance for hyper frequency signals of the same pulsation, of the six-port type |
| 01/05/1995 | DE4319344A1 Method for measuring a phase difference |
| 12/28/1994 | CN1027211C Direct phase digitization |
| 12/27/1994 | US5376847 Phase detector and methodology |
| 11/09/1994 | CN2182481Y Phase-sequence display protector for phase failure and phase error |
| 09/27/1994 | US5351000 Method of cancelling offset errors in phase detectors |
| 08/30/1994 | US5343404 Precision digital multimeter and waveform synthesizer for multi-signals with distorted waveforms embedded in noise |
| 08/25/1994 | DE4305244A1 Bit synchroniser for use in systems with very high clock rates |
| 07/26/1994 | US5331963 Apparatus for examining objects by ultrasonic echography |
| 07/21/1994 | DE4400825A1 Ring oscillator and pulse phase difference encoding circuit |
| 06/22/1994 | CN2169859Y High and low voltage phase measurer |
| 06/07/1994 | US5319304 Device for monitoring load |
| 05/26/1994 | WO1994011744A1 Precision ditigal multimeter and waveform synthesizer for multi-signals with distorted waveforms embedded in noise |
| 05/26/1994 | DE4300949C1 Dual microwave interferometer, e.g. for measuring plasma electron density - measures phase-shift in microwave radiation using two mixers coupled to delay and measuring path |
| 05/26/1994 | CA2149296A1 Precision digital multimeter and waveform synthesizer for multi-signals with distorted waveforms embedded in noise |
| 05/18/1994 | CN2165452Y Self-check industrial frequency phase meter |
| 05/18/1994 | CN1024593C Measurement method for phase and integer of phase of heterodyne interferometer signal processing and its apparatus |
| 05/17/1994 | CA1329643C Instrument for measuring the phase jitter of analog signals |
| 05/11/1994 | EP0494984B1 Phase detector for phase-locked loop clock recovery system |
| 05/03/1994 | US5309111 Apparatus for measuring skew timing errors |
| 04/19/1994 | US5305243 Method and device for comparing two variable analogue signals |
| 04/12/1994 | US5302908 High precision phase comparator and phase locked loop |
| 03/31/1994 | DE4232139A1 Phase difference detector, esp. for PLL frequency synthesiser - generates follow-up signal for detected output signal to detect phase difference |
| 03/23/1994 | EP0588656A2 Digital PLL circuit having signal edge position measurement |
| 03/16/1994 | EP0586889A2 Method for measuring the amplitude and phase of a plurality of high frequency signals |
| 03/09/1994 | EP0585806A2 Digital phase comparator and phase-locked loop |
| 02/22/1994 | US5289135 Pulse phase difference encoding circuit |
| 02/17/1994 | WO1994003818A1 High speed power analyzer |
| 02/16/1994 | CN1082296A Apparatus for measuring skew timing errors |
| 01/05/1994 | CN1023427C Broad-band frequency measuring method with phase detection and high-precision frequency meter |
| 12/29/1993 | EP0575933A1 Apparatus for measuring skew timing errors |
| 12/29/1993 | CN1080056A Ultralow frequency digital phase meter |
| 12/21/1993 | US5272756 Method and apparatus for determining phase correlation of a stereophonic signal |
| 12/21/1993 | US5272440 Isolation monitors and measuring device for an electrical power system with isolated neutral |
| 11/25/1993 | DE4031447A1 Phasendiskriminator mit räumlicher Abtastung Quadrature with spatial sampling |
| 10/26/1993 | US5257284 Circuit for accurately measuring phase relationship of BPSK signals |
| 10/21/1993 | DE4204101C1 Phase detector measuring relative phase of periodic electrical signals - uses threshold switches receiving detector output coupled via switching device to switching logic controlling multivibrator output |
| 10/13/1993 | EP0564923A2 Method and device for phase measuring |
| 09/29/1993 | EP0562989A1 Procedure and apparatus for measuring phase noise of sinusoidal signal generators |
| 09/15/1993 | CN1022138C Method of digitally evaluating frequency and phase of signals, and device for implementing such method |
| 08/18/1993 | EP0556147A2 Three phase reversal detection system |
| 08/14/1993 | CA2088640A1 Solid state three phase reversal detection circuit |
| 08/10/1993 | US5235566 Clock skew measurement technique |
| 07/28/1993 | EP0552601A2 Phase comparator |
| 07/08/1993 | DE4205300C1 Digital determination of phase and amplitude of periodic signal in phase locked loop - sampling periodic signal using sampling period to give constant whole number of measured value samples and phase estimates per period |
| 06/15/1993 | US5220275 Accumulator phase digitizer |
| 05/26/1993 | EP0286664B1 Phase measuring device and method implementing a filter |
| 05/19/1993 | CN2133847Y Monitor for power angle of synchronous generator |
| 05/11/1993 | US5210444 Duty cycle meter |
| 05/05/1993 | EP0540052A1 Ripple-free phase detector using two sample-and-hold circuits |
| 04/21/1993 | CN1071257A Phase-detecting circuit |
| 02/16/1993 | US5187719 Method and apparatus for measuring modulation accuracy |
| 02/02/1993 | US5184063 Three phase reversal detection system |
| 01/26/1993 | US5182511 Detector circuit for detecting a phase signal of a polyphase alternator for a battery charge regulator in a motor vehicle, and utilization thereof |
| 01/21/1993 | DE4124005A1 Electronic circuit for measuring periodic signal phase and frequency differences - has cyclic serial state machine, shift register, state identification logic and comparison logic |
| 01/20/1993 | EP0217967B1 Heterodyne-type method and apparatus for measuring signals, having means for automatically correcting the detuning |
| 12/30/1992 | EP0520563A1 Ultrasonic echography with phase aberration adaptive correction |
| 12/16/1992 | EP0518785A1 Device for checking and measuring the insulation of a power line having an insulated neutral conductor |
| 11/22/1992 | CA2068952A1 Isolation monitoring and measuring device for an electrical power system with isolated neutral |
| 10/21/1992 | CN2119666U Phase-locked non-regulation digital phase meter |
| 10/21/1992 | CN1065533A Method and instrument for checking false wiring of watt-hour meter |
| 09/29/1992 | US5151866 High speed power analyzer |
| 09/22/1992 | US5150128 In-phase and quadrature conversion error compensator |
| 09/15/1992 | US5148373 Method and an arrangement for accurate digital determination of the time or phase position of a signal pulse train |
| 08/11/1992 | US5138320 Skew code generator for measuring pulses width using a delay line |
| 07/29/1992 | EP0496553A2 Phase locked loop having a charge pump with reset |
| 07/22/1992 | CN1017558B Synchronous phase-angle detector for synchro-generator |
| 07/07/1992 | US5128624 Pulse phase difference encoding circuit |
| 06/30/1992 | US5126602 Digital phase detector in an NRZ bit synchronous system |
| 06/23/1992 | US5124656 Adaptive estimation of phase or delay for both leading and lagging phase shifts |
| 06/16/1992 | US5122978 Pulse width measurement technique |
| 05/27/1992 | DE4135425A1 Power distribution line automatic defects detector |
| 05/12/1992 | CA1300697C Extended range phase detector |
| 05/05/1992 | CA1300225C Method and device for digitally determining the frequency and phase of a signal |
| 04/22/1992 | EP0481821A2 Method and apparatus for determining phase correlation of a stereophonic signal |
| 04/21/1992 | CA1299255C Frequency synthesizer having digital phase detector with optimal steering and level-type lock indication |
| 04/08/1992 | CN2101249U High voltage meter |
| 04/07/1992 | US5103162 Apparatus for determining when a preselected phase relationship exists between two periodic waveforms |
| 03/12/1992 | DE4032441C1 Measuring phase relationship of two analog signals of equal frequency - converting signals into square wave signals, halving frequency on one and counting with clock counters |
| 03/10/1992 | US5095287 Phase locked loop having a charge pump with reset |
| 03/04/1992 | EP0473282A2 Method for measuring modulation accuracy |
| 02/13/1992 | DE4025307A1 Digital determination of phase difference of two signals - has reference value and corresp. regulated signals linked to release signal in logic circuit with zero-crossing counter |
| 02/12/1992 | CN1058680A Direct phase digitization |
| 02/05/1992 | EP0469634A1 Pulse phase adjusting circuit for use with an electrostatic capacitor type sensor |
| 01/28/1992 | US5084669 Direct phase digitization |
| 01/21/1992 | US5083090 Contactless measurement of the electrical resistance per unit length of filaments |
| 01/02/1992 | EP0463206A1 Measuring process for small phase differences and circuit for applying this process |
| 12/11/1991 | EP0460260A1 Tracking arrangement for synchronization |
| 12/10/1991 | US5072173 Phase detector for mark/space modulated signals |
| 12/10/1991 | US5072140 Automatic gain control for interferometers and phase sensitive detectors |
| 12/03/1991 | CA1292774C Microwave moisture measurement using two microwave signals of different frequency and phase shift determination |
| 11/27/1991 | CN1056582A Broad-band frequency measuring technique with phase detection and high-precision frequency meter |
| 10/30/1991 | CN1055820A Measurement method for phase and integer of phase of heterodyne interferometer signal processing |