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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04/18/1989 | US4823293 Correlation time-difference detector |
04/04/1989 | US4819080 Instrument for measuring the phase jitter of analog signals |
03/29/1989 | EP0308678A1 Process and device for measuring the phase of signals at a test point by means of an unmodulated particle beam |
03/29/1989 | EP0308677A1 Process and device for measuring the phase of signals at a test point by means of a modulated particle beam |
03/21/1989 | US4814726 Digital phase comparator/charge pump with zero deadband and minimum offset |
03/14/1989 | US4812849 Nonquadrature correction circuit |
02/23/1989 | WO1989001634A1 Method of measuring skew or phase difference in electronic systems |
02/21/1989 | US4806870 Phase comparator and data separator |
02/14/1989 | CA1250041A1 Data processing |
02/07/1989 | US4803385 Phase detecting circuit |
01/25/1989 | CN1030680A Device for detecting bit phase difference |
01/18/1989 | EP0299060A1 High impedance fault analyzer in electric power distribution. |
01/11/1989 | EP0298581A2 Phase comparator insensitive to clock asymmetry |
01/10/1989 | US4797625 Device for detecting bit phase difference |
12/29/1988 | WO1988010432A1 Method for removing cable generated phase errors from network analyzer measurement |
12/28/1988 | EP0296595A2 Instrument for measuring the phase jitter of analog signals |
12/28/1988 | CA1247701A Digital phase measurement methods |
12/21/1988 | CN88103012A Method of digitally evaluating frequency and phase of signals, and device for implemeting such method |
12/15/1988 | WO1988009938A1 Method and apparatus for processing synthetic aperture aerial signals |
12/14/1988 | EP0295160A1 Method for numerically evaluating the frequency and phase of signals and device using such a method |
12/08/1988 | DE3153249C2 Phase discriminator arrangement |
12/06/1988 | US4789822 Three-electrode sensor for phase comparison and pulse phase adjusting circuit for use with the sensor |
11/29/1988 | US4788585 Apparatus for measuring SC/H phase of composite video signal |
11/15/1988 | US4785251 Digital frequency and phase comparator |
11/15/1988 | CA1244883A1 Phase difference fault detector |
10/27/1988 | DE3809199A1 Method for determining the repetitive time of synchronization |
10/26/1988 | CN87204694U Industrial-frequency digital phase meter |
10/19/1988 | EP0286664A1 Phase measuring device and method implementing a filter. |
10/04/1988 | US4775811 Phase comparator |
09/27/1988 | CA1242484A1 Method and system for measuring the amplitude and phase angle of harmonics in a periodic signal |
09/20/1988 | US4772852 Phase-frequency comparator for phase-locked loops |
08/16/1988 | US4764737 Frequency synthesizer having digital phase detector with optimal steering and level-type lock indication |
07/28/1988 | WO1988005543A1 High impedance fault analyzer in electric power distribution |
07/20/1988 | CN87100002A Non-contact voltage-phase signal capture method and its application |
07/06/1988 | EP0273518A2 Angle digitiser |
06/28/1988 | US4754225 Phase comparator insensitive to clock asymmetry |
06/28/1988 | US4754216 Method and apparatus for qualifying the decode window margin of a phase locked loop data synchronizer |
06/16/1988 | DE3641590A1 Phase shift detector |
06/14/1988 | US4751469 Phase coincidence detector |
06/14/1988 | US4751468 Tracking sample and hold phase detector |
04/27/1988 | EP0265080A1 Device for detecting bit phase difference |
04/21/1988 | WO1988002867A1 Filter, phase measuring device and method implementing such filter |
04/20/1988 | EP0264035A2 Phase comparator, especially for a phase-locked loop |
04/19/1988 | US4739278 Digital phase-frequency discriminator comprising simplified reset means and associated method |
03/02/1988 | EP0257724A2 Three-electrode sensor for phase comparison and pulse phase adjusting circuit for use with the sensor |
03/01/1988 | US4728884 Infinite dynamic range phase detector |
02/24/1988 | EP0256637A2 Phase detector |
02/23/1988 | US4727311 Microwave moisture measurement using two microwave signals of different frequency and phase shift determination |
01/26/1988 | US4721905 Digital phase meter circuit |
01/26/1988 | US4721904 Digital phase difference detecting circuit |
01/26/1988 | US4721901 Method and apparatus for reflection coefficient measurements |
01/26/1988 | CA1232047A1 Phase detecting apparatus for use in synchronising systems |
01/07/1988 | EP0251144A1 Phase comparator |
01/07/1988 | EP0250683A1 Tracking sample and hold phase detector |
12/23/1987 | EP0249691A1 Flow counter for fluids |
12/08/1987 | US4712061 Small propagation delay measurement for digital logic |
12/08/1987 | US4712060 Sampling average phase meter |
12/02/1987 | CN86103907A Synchronous rotary light-emitting diode measurement of operating frequency phase |
12/01/1987 | US4710892 Phase calculation circuitry in digital television receiver |
12/01/1987 | US4710702 Heterodyne type signal-measuring method and a measuring apparatus including automatic detuning correction means |
11/25/1987 | EP0246269A1 Digital phase-frequency discriminator comprising simplified reset means. |
11/04/1987 | EP0243835A1 Measuring arrangement in systems with digital subsystems for registering voltage, current and phase angle |
11/03/1987 | US4704574 Phase difference measurement apparatus and method |
10/27/1987 | US4703448 Method for measuring skew or phase difference in electronic systems |
10/13/1987 | US4700129 Phase measurement apparatus with automatic calibration |
10/06/1987 | US4698600 Clock phase discriminator |
09/22/1987 | US4695843 Method for processing radio signals for radionavigation and receiver for carrying out the said method |
09/22/1987 | US4695792 Method and system for measuring the amplitude and phase angle of harmonics in a periodic signal |
09/22/1987 | CA1227246A1 Method and device for measuring phase jitter on a transmission channel |
09/16/1987 | EP0237278A2 Measurement of SC/H phase |
09/02/1987 | EP0234900A2 Phase detecting circuit |
08/12/1987 | CN86108211A 数字相位表电路 Digital phase meter circuit |
08/05/1987 | CN86205140U Portable microcomputer phase-time freq. meter |
07/14/1987 | US4680620 Measurement of SC/H phase using a subcarrier time mark generator and a calibrated phase shifter |
07/07/1987 | US4678949 Synchronism detector circuit |
06/23/1987 | US4675614 Phase difference measurement system |
06/16/1987 | EP0225396A1 Digital phase measuring circuit |
06/10/1987 | CN85200721U Digital phase tester on condition of heavy current |
05/21/1987 | WO1987003097A1 Digital phase-frequency discriminator comprising simplified reset means and associated method |
05/19/1987 | US4667186 Phase difference fault detector |
05/19/1987 | US4667151 Calibrated radio frequency sweep |
04/28/1987 | US4661770 Method and apparatus for measuring minority carrier lifetime in a direct band-gap semiconductor |
04/28/1987 | US4661769 Measurement of magnitude and phase angle of voltage and current phasors and frequency deviation in power systems |
04/15/1987 | EP0217967A1 Heterodyne-type method and apparatus for measuring signals, having means for automatically correcting the detuning |
04/01/1987 | EP0216128A1 Synchronous detector |
03/31/1987 | US4654861 Method and device for measuring phase jitter on a transmission channel |
03/31/1987 | US4654600 Phase detector |
03/31/1987 | US4654586 Digital phase meter apparatus |
03/31/1987 | US4654585 Phase detection method |
02/25/1987 | CN86101904A Intelligence frequency meter with high-resolution |
02/18/1987 | CN85106393A Phase locking frequency multiplying cross compensation phase meter |
02/17/1987 | US4644286 Article surveillance system receiver using synchronous demodulation and signal integration |
02/17/1987 | US4644268 Apparatus and method for determining the magnitude and phase of the fundamental component of a complex waveshape |
02/10/1987 | US4642562 Phase difference demodulator |
02/03/1987 | US4641087 Phase comparator apparatus and method |
01/13/1987 | US4636720 Phase detector |
01/13/1987 | US4636719 Apparatus for extended precision phase measurement |
01/07/1987 | EP0207323A2 Phase synchronism detector |
01/06/1987 | US4635239 Data processing |
01/06/1987 | US4634967 Phase comparator |