Patents
Patents for G01R 25 - Arrangements for measuring phase angle between a voltage and a current or between voltages or currents (2,594)
04/1989
04/18/1989US4823293 Correlation time-difference detector
04/04/1989US4819080 Instrument for measuring the phase jitter of analog signals
03/1989
03/29/1989EP0308678A1 Process and device for measuring the phase of signals at a test point by means of an unmodulated particle beam
03/29/1989EP0308677A1 Process and device for measuring the phase of signals at a test point by means of a modulated particle beam
03/21/1989US4814726 Digital phase comparator/charge pump with zero deadband and minimum offset
03/14/1989US4812849 Nonquadrature correction circuit
02/1989
02/23/1989WO1989001634A1 Method of measuring skew or phase difference in electronic systems
02/21/1989US4806870 Phase comparator and data separator
02/14/1989CA1250041A1 Data processing
02/07/1989US4803385 Phase detecting circuit
01/1989
01/25/1989CN1030680A Device for detecting bit phase difference
01/18/1989EP0299060A1 High impedance fault analyzer in electric power distribution.
01/11/1989EP0298581A2 Phase comparator insensitive to clock asymmetry
01/10/1989US4797625 Device for detecting bit phase difference
12/1988
12/29/1988WO1988010432A1 Method for removing cable generated phase errors from network analyzer measurement
12/28/1988EP0296595A2 Instrument for measuring the phase jitter of analog signals
12/28/1988CA1247701A Digital phase measurement methods
12/21/1988CN88103012A Method of digitally evaluating frequency and phase of signals, and device for implemeting such method
12/15/1988WO1988009938A1 Method and apparatus for processing synthetic aperture aerial signals
12/14/1988EP0295160A1 Method for numerically evaluating the frequency and phase of signals and device using such a method
12/08/1988DE3153249C2 Phase discriminator arrangement
12/06/1988US4789822 Three-electrode sensor for phase comparison and pulse phase adjusting circuit for use with the sensor
11/1988
11/29/1988US4788585 Apparatus for measuring SC/H phase of composite video signal
11/15/1988US4785251 Digital frequency and phase comparator
11/15/1988CA1244883A1 Phase difference fault detector
10/1988
10/27/1988DE3809199A1 Method for determining the repetitive time of synchronization
10/26/1988CN87204694U Industrial-frequency digital phase meter
10/19/1988EP0286664A1 Phase measuring device and method implementing a filter.
10/04/1988US4775811 Phase comparator
09/1988
09/27/1988CA1242484A1 Method and system for measuring the amplitude and phase angle of harmonics in a periodic signal
09/20/1988US4772852 Phase-frequency comparator for phase-locked loops
08/1988
08/16/1988US4764737 Frequency synthesizer having digital phase detector with optimal steering and level-type lock indication
07/1988
07/28/1988WO1988005543A1 High impedance fault analyzer in electric power distribution
07/20/1988CN87100002A Non-contact voltage-phase signal capture method and its application
07/06/1988EP0273518A2 Angle digitiser
06/1988
06/28/1988US4754225 Phase comparator insensitive to clock asymmetry
06/28/1988US4754216 Method and apparatus for qualifying the decode window margin of a phase locked loop data synchronizer
06/16/1988DE3641590A1 Phase shift detector
06/14/1988US4751469 Phase coincidence detector
06/14/1988US4751468 Tracking sample and hold phase detector
04/1988
04/27/1988EP0265080A1 Device for detecting bit phase difference
04/21/1988WO1988002867A1 Filter, phase measuring device and method implementing such filter
04/20/1988EP0264035A2 Phase comparator, especially for a phase-locked loop
04/19/1988US4739278 Digital phase-frequency discriminator comprising simplified reset means and associated method
03/1988
03/02/1988EP0257724A2 Three-electrode sensor for phase comparison and pulse phase adjusting circuit for use with the sensor
03/01/1988US4728884 Infinite dynamic range phase detector
02/1988
02/24/1988EP0256637A2 Phase detector
02/23/1988US4727311 Microwave moisture measurement using two microwave signals of different frequency and phase shift determination
01/1988
01/26/1988US4721905 Digital phase meter circuit
01/26/1988US4721904 Digital phase difference detecting circuit
01/26/1988US4721901 Method and apparatus for reflection coefficient measurements
01/26/1988CA1232047A1 Phase detecting apparatus for use in synchronising systems
01/07/1988EP0251144A1 Phase comparator
01/07/1988EP0250683A1 Tracking sample and hold phase detector
12/1987
12/23/1987EP0249691A1 Flow counter for fluids
12/08/1987US4712061 Small propagation delay measurement for digital logic
12/08/1987US4712060 Sampling average phase meter
12/02/1987CN86103907A Synchronous rotary light-emitting diode measurement of operating frequency phase
12/01/1987US4710892 Phase calculation circuitry in digital television receiver
12/01/1987US4710702 Heterodyne type signal-measuring method and a measuring apparatus including automatic detuning correction means
11/1987
11/25/1987EP0246269A1 Digital phase-frequency discriminator comprising simplified reset means.
11/04/1987EP0243835A1 Measuring arrangement in systems with digital subsystems for registering voltage, current and phase angle
11/03/1987US4704574 Phase difference measurement apparatus and method
10/1987
10/27/1987US4703448 Method for measuring skew or phase difference in electronic systems
10/13/1987US4700129 Phase measurement apparatus with automatic calibration
10/06/1987US4698600 Clock phase discriminator
09/1987
09/22/1987US4695843 Method for processing radio signals for radionavigation and receiver for carrying out the said method
09/22/1987US4695792 Method and system for measuring the amplitude and phase angle of harmonics in a periodic signal
09/22/1987CA1227246A1 Method and device for measuring phase jitter on a transmission channel
09/16/1987EP0237278A2 Measurement of SC/H phase
09/02/1987EP0234900A2 Phase detecting circuit
08/1987
08/12/1987CN86108211A 数字相位表电路 Digital phase meter circuit
08/05/1987CN86205140U Portable microcomputer phase-time freq. meter
07/1987
07/14/1987US4680620 Measurement of SC/H phase using a subcarrier time mark generator and a calibrated phase shifter
07/07/1987US4678949 Synchronism detector circuit
06/1987
06/23/1987US4675614 Phase difference measurement system
06/16/1987EP0225396A1 Digital phase measuring circuit
06/10/1987CN85200721U Digital phase tester on condition of heavy current
05/1987
05/21/1987WO1987003097A1 Digital phase-frequency discriminator comprising simplified reset means and associated method
05/19/1987US4667186 Phase difference fault detector
05/19/1987US4667151 Calibrated radio frequency sweep
04/1987
04/28/1987US4661770 Method and apparatus for measuring minority carrier lifetime in a direct band-gap semiconductor
04/28/1987US4661769 Measurement of magnitude and phase angle of voltage and current phasors and frequency deviation in power systems
04/15/1987EP0217967A1 Heterodyne-type method and apparatus for measuring signals, having means for automatically correcting the detuning
04/01/1987EP0216128A1 Synchronous detector
03/1987
03/31/1987US4654861 Method and device for measuring phase jitter on a transmission channel
03/31/1987US4654600 Phase detector
03/31/1987US4654586 Digital phase meter apparatus
03/31/1987US4654585 Phase detection method
02/1987
02/25/1987CN86101904A Intelligence frequency meter with high-resolution
02/18/1987CN85106393A Phase locking frequency multiplying cross compensation phase meter
02/17/1987US4644286 Article surveillance system receiver using synchronous demodulation and signal integration
02/17/1987US4644268 Apparatus and method for determining the magnitude and phase of the fundamental component of a complex waveshape
02/10/1987US4642562 Phase difference demodulator
02/03/1987US4641087 Phase comparator apparatus and method
01/1987
01/13/1987US4636720 Phase detector
01/13/1987US4636719 Apparatus for extended precision phase measurement
01/07/1987EP0207323A2 Phase synchronism detector
01/06/1987US4635239 Data processing
01/06/1987US4634967 Phase comparator
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