Patents
Sitemap › G01 - Measuring; Testing › G01R - Measuring electric variables; Measuring magnetic variables › G01R 25 - Arrangements for measuring phase angle between a voltage and a current or between voltages or currents
Patents for G01R 25 - Arrangements for measuring phase angle between a voltage and a current or between voltages or currents (2,594)
09/1999
09/14/1999US5952853 Method for extending the output range of pulse-width based phase detectors
08/1999
08/10/1999US5936430 Phase detection apparatus and method
07/1999
07/22/1999WO1999036792A1 Self-compensating phase detector
07/21/1999CN2329975Y Portable phase sequence tester
07/20/1999US5926041 Phase detector with linear output response
07/13/1999US5923706 Process for measuring phase jitter of a data signal
07/09/1999CA2258655A1 Phase detectors
07/01/1999WO1999032892A1 Method and arrangement for detecting phase difference
06/1999
06/30/1999EP0926813A1 Pulse-width based phase detector having a extended output range
06/10/1999WO1999029077A1 Phase digitizer for radio communications
05/1999
05/19/1999EP0917290A2 Pulse generator
05/11/1999US5903144 Circuit configuration for phase difference measurement
05/06/1999EP0913668A1 Process for measuring the phase angle of position sensors with sinusoidal output signals
05/04/1999US5900747 Sampling phase detector
04/1999
04/15/1999WO1999018691A1 Digital phase discrimination based on frequency sampling
04/06/1999US5892645 Protection system for power receiving station
03/1999
03/23/1999CA2053552C Method and apparatus for determining phase correlation of a stereophonic signal
03/18/1999WO1998054584A3 Two port handheld vector network analyzer with frequency monitor mode
03/16/1999US5883536 Digital phase detector device ultilizing dither generator
02/1999
02/18/1999WO1998052284A3 Phase detector arrangement
02/11/1999DE19818976A1 Phase detector for isolating interference signals from detector output signal
02/04/1999DE19740700C1 Clock signal phase difference evaluation method
02/02/1999US5867693 Extended resolution phase measurement
01/1999
01/26/1999CA2054765C Direct phase digitization
01/14/1999WO1999001812A1 Extended resolution phase measurement
01/13/1999CN1204773A Method and apparatus for detecting out-of-step in electric power system
12/1998
12/30/1998CN2302524Y Electronic phase-sequence meter
12/16/1998EP0771422B1 Process for measuring phase jitter of a data signal
12/08/1998US5847558 Periodic signal analyzer using a randomly varied phase shifting circuit
12/03/1998WO1998054584A2 Two port handheld vector network analyzer with frequency monitor mode
12/02/1998EP0881499A2 Semiconductor integrated circuit including phase locked loop circuit and jitter detector
12/02/1998EP0880707A1 Phase- and frequency detector
12/01/1998US5844408 Phase difference measuring apparatus for measuring phase difference between input signals
11/1998
11/25/1998CN2298523Y High-voltage to phase line measuring instrument
11/24/1998CA2003463C Method and apparatus for measuring phase accuracy and amplitude profile of a continuous-phase-modulation signal
11/19/1998WO1998052284A2 Phase detector arrangement
11/19/1998CA2290619A1 Phase detector arrangement
11/17/1998US5838737 Method and apparatus for estimating PSK modulated signals
11/03/1998US5831461 Method & apparatus for tracking characteristics of a data stream and a system incorporating the same
11/03/1998US5831423 Phase meter and method of providing a voltage indicative of a phase difference
10/1998
10/28/1998EP0874449A2 A method and apparatus for phase detection in digital signals
10/20/1998US5825173 Circuit for detecting phase angle of three-phase alternating current
10/13/1998US5821642 Arc prevention circuit for a mechanical switch
10/07/1998EP0869599A2 Method and apparatus for detecting out-of-step in electric power system
10/06/1998US5818265 Digital phase detector
09/1998
09/15/1998US5808895 Method and apparatus for low signal to noise ratio instantaneous phase measurement
09/15/1998US5808462 Apparatus for detecting the amplitude and phase of an a.c. signal
09/09/1998CN1039750C Method for measuring phase angle of sinusoidal quantity of electric power syslem and measuring system
08/1998
08/06/1998WO1998034128A1 Phase detector for a predetermined incoming data sequence
08/06/1998CA2279596A1 Phase detector for a predetermined incoming data sequence
08/05/1998EP0856941A1 Sampling phase detector
07/1998
07/28/1998US5787124 Quadrature detector and amplitude error correction method for quadrature detector
07/22/1998EP0854365A2 Numerical comparator
07/21/1998US5783950 Phase comparator
07/15/1998CN1187881A Interrogator for electronic identification system
07/07/1998CA2030621C Method and an arrangement for accurate digital determination of the time or phase position of a signal pulse train
07/01/1998CN2285477Y Digital double-clamping phase volt-ampere meter
06/1998
06/30/1998US5774625 Arrangement for monitoring the rotational speed of a rotary-anode drive motor of x-ray
06/24/1998EP0849907A2 Phase measurement apparatus and method
06/18/1998DE19640922C1 Relative phase angle measuring device for AC signals of equal frequency
06/17/1998EP0787304A4 Numerical comparator
06/16/1998US5767665 Phase difference measuring apparatus and mass flowmeter thereof
06/09/1998US5764044 Process for producing time dependent waveforms of positive and negative symmetrical sequence components of a power system's voltages or currents
05/1998
05/19/1998US5754437 Phase measurement apparatus and method
05/19/1998US5754040 Apparatus for testing medium voltage primary distribution cables
05/19/1998CA2087516C High precision digital phase comparator
05/06/1998EP0729583B1 Phase-measurement device
04/1998
04/30/1998DE19642871A1 Measurement circuit for voltage controller for automatic control of transformer with stage switch
04/28/1998CA2133864C Apparatus for detecting the amplitude and phase of an a.c. signal
04/08/1998EP0737317B1 Digital phase detector
04/07/1998CA2108956C Circuit for accurately measuring phase relationship of bpsk signals
04/02/1998WO1998013936A1 Connected source of current
03/1998
03/24/1998US5731698 Apparatus for detecting the amplitude and phase of an a.c. signal
03/11/1998EP0804740A4 Handheld vector network analyzer
03/03/1998US5723989 Phase-measurement device
02/1998
02/25/1998CN1174330A Circuit for detecting phase angle of three-phase alternating current
02/19/1998DE19703889C1 Scanning phase detector device
02/11/1998EP0823059A1 Interrogator for electronic identification system
02/11/1998CN1173061A Protection system for power receiving station
02/04/1998EP0822635A2 Protection system for power receiving station
02/03/1998US5714877 Apparatus for detecting the amplitude and phase of an A.C. signal
01/1998
01/08/1998WO1998000722A1 Precise digital frequency detection
01/08/1998WO1997045709A3 A method and apparatus for low signal to noise ratio instantaneous phase measurement
01/07/1998EP0653070B1 High speed power analyzer
12/1997
12/29/1997EP0648017B1 Device for monitoring phase skew between two clock signals
12/11/1997DE19639706C1 Controlled current source, especially for charge pump
12/04/1997WO1997045709A2 A method and apparatus for low signal to noise ratio instantaneous phase measurement
11/1997
11/25/1997US5691656 Precision (nπ)/2 latching phase detector
11/05/1997EP0804740A1 Handheld vector network analyzer
11/04/1997US5684805 Microwave multiphase detector
10/1997
10/28/1997US5682238 Signal processing apparatus
10/14/1997CA2081863C Ripple-free phase detector using two sample-and-hold circuits
10/08/1997CN1161747A Numerical comparator
09/1997
09/03/1997EP0793109A1 Measuring method and measuring system of phase angle of electrical system sinusoidal quantities
09/02/1997US5663992 Method and apparatus for correction of GPS carrier phase measurement
09/02/1997US5663666 Digital phase detector
08/1997
08/27/1997EP0792011A2 A digital phase detector
08/27/1997EP0791807A2 Phase difference measuring apparatus for measuring phase difference between input signals
08/21/1997WO1997030357A1 Phase- and frequency detector
08/21/1997CA2246375A1 Phase- and frequency detector
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