Patents
Patents for G01R 29 - Arrangements for measuring or indicating electric quantities not covered by groups (11,937)
02/1997
02/12/1997EP0758089A2 Direction sensor and distortion reduction control circuitry
02/12/1997EP0757797A1 Method for monitoring lightning protection equipment
02/11/1997US5602387 Method of protecting an RF receiver in a hostile electromagnetic environment
02/06/1997WO1997004322A1 System and method for measuring the total electron content of the ionosphere
02/06/1997CA2227226A1 System and method for measuring the total electron content of the ionosphere
02/05/1997EP0757440A2 A time interval measurement system and a method applied therein
02/04/1997US5600252 Device for injecting current at radio frequency into electric wiring
02/04/1997US5600251 Surface electric potential sensor drive and induction noise cancellation circuit
01/1997
01/30/1997WO1997003505A1 Satellite communications system having user rf exposure monitoring and control
01/29/1997EP0467997B1 Method and means for near field antenna monitoring
01/28/1997US5598439 Method and apparatus for symbol clock phase recovery
01/16/1997WO1997001885A1 Improved charge rate electrometer
01/15/1997EP0753943A2 Satellite communications system having user RF exposure monitoring and control
01/15/1997CN1140261A Ejection space electric field detecting method and apparatus
01/14/1997US5594458 Comb generator, device and process for calibrating measurement sections
01/14/1997US5594218 Anechoic chamber absorber and method
01/14/1997CA2179224A1 Satellite communications system having user rf exposure monitoring and control
01/09/1997WO1996034293A3 Process for monitoring a three-phase mains for a change in the tuning of the arc supression coil
01/08/1997EP0752106A1 Method and apparatus for analyzing a waveform
01/08/1997EP0441898B1 Optical sensing apparatus and method
01/07/1997US5592390 Time based method for analyzing a waveform
01/02/1997DE19617977A1 Wave analysis system for data of specific finite elements of EM wave
12/1996
12/31/1996US5590158 Method and apparatus for estimating PSK modulated signals
12/31/1996US5589788 For receiving an input signal
12/31/1996US5589773 System and method for making electromagnetic measurements using a tiltable transverse electromagnetic cell and a fixed tilt sample holder
12/27/1996EP0519017B1 Method and apparatus for calibration in a high speed rf measurement receiver
12/24/1996US5587917 Data collection and processing for digital AC power system monitor/analyzer
12/19/1996WO1996041319A1 Self-excited microelectromechanical device
12/19/1996WO1996041203A1 Electromagnetic noise detector for implantable medical devices
12/19/1996DE19623688A1 Electromagnetic field strength calculator for electric circuit
12/19/1996CA2219310A1 Electromagnetic noise detector for implantable medical devices
12/18/1996EP0749210A2 Counting circuit for measuring pulse spacing, sampling circuit, skew adjusting circuit, and logic analyzing circuit
12/17/1996US5585730 Apparatus for measuring surface charge on a sheet or web
12/12/1996DE19521002A1 Detection of harmful electrical and=or magnetic fields
12/12/1996DE19520781A1 Wave guide detector with integrated HF antenna element feeding detector diode
12/11/1996EP0747714A2 Noise measurement test system
12/10/1996US5583637 Optical electric field sensor using optical component having electrooptical effect
12/04/1996EP0745863A1 Electronic discharge detector for electrical apparatus
12/04/1996EP0327545B1 Determination of particle size and electric charge
12/03/1996US5581204 Pulse width measurement circuit
12/03/1996CA2085528C Time constant detecting circuit and time constant adjusting circuit
11/1996
11/28/1996WO1996037786A1 A measuring system and a method for detecting static electricity and/or change thereof in a measuring object and use thereof
11/13/1996EP0742649A2 Directional coupler arrangement for the measurement of power
11/12/1996US5574981 Method and arrangement for measuring the condition of a receiver antenna
11/12/1996US5574805 Electric field sensor
11/12/1996US5573339 Active radiometer for self-calibrated furnace temperature measurements
11/07/1996WO1996035103A1 A piezoelectric crystal microbalance device
11/06/1996CN1135046A Partial-discharge measuring device
11/05/1996US5572118 Charge rate electrometer including means for substantially eliminating leakage currents
10/1996
10/31/1996WO1996034293A2 Process for monitoring a three-phase mains for a change in the tuning of the arc supression coil
10/31/1996DE19616772A1 Electromagnetic field strength calculation device
10/30/1996EP0740073A1 Circuit for detecting an overvoltage on an electric load
10/30/1996EP0740072A1 Method and circuit for detecting the presence of a spark in internal combustion engine
10/29/1996US5570326 Device for measuring the duration of a time interval
10/29/1996US5570031 Substrate surface potential measuring apparatus and plasma equipment
10/29/1996US5570029 Cable crosstalk measurement system
10/24/1996DE19529161C1 Measuring device for Ac voltages in human body
10/22/1996US5568394 Interferometry with multipath nulling
10/17/1996DE19513872A1 Motor vehicle multi-antenna testing method
10/16/1996CN1133439A Monitoring and measuring system for transient parameter of multiplex high power discharge pulse
10/15/1996US5565822 TEM waveguide arrangement
10/09/1996EP0736776A2 Searching electromagnetic disturbing source
10/08/1996US5563921 Jitter detection apparatus using double-PLL structure
10/08/1996US5563517 Dual channel d.c. low noise measurement system and test methodology
10/08/1996US5563409 Crosstalk measurement system and technique
10/03/1996WO1996030774A1 Noise detecting and recording device
10/02/1996EP0735374A2 Time counting circuit and counter circuit
10/02/1996EP0679261B1 Method and apparatus for measuring partial discharges in cables
10/02/1996CN1132577A Measurement of gain error in a base station receiver, and improvement in field strength measurement
09/1996
09/26/1996WO1996029789A1 Process for monitoring the quantisation quality in digital radio or television transmission systems
09/19/1996WO1991008493A3 Method and device for comparing two variable analog signals
09/19/1996DE19509117A1 Verfahren zur Überwachung der Übertragungsqualität digitalisierter Signale Method for monitoring the transmission quality of digitized signals
09/18/1996CN1131278A Local discharge pulse sensor for coupled high voltage alive equipment
09/17/1996US5557633 Integrated multi-port repeater having shared resources
09/17/1996US5557215 Self-bias measuring method, apparatus thereof and electrostatic chucking apparatus
09/17/1996US5557196 Jitter analyzer
09/12/1996DE19512787A1 Location detector using synthetic aperture, for locating e.g. microwave interference source
09/12/1996DE19507809A1 Safe determination of electromagnetic compatibility and interference
09/10/1996US5555278 Semiconductor circuit having phase lock function
09/10/1996US5555207 Electromagnetic field frequency and image magnetic forms quantum analyzer apparatus
09/10/1996US5554173 Defibrillator charge tester
09/06/1996WO1996027137A1 Method of determining the sense of rotation of a three-phase system
09/04/1996EP0730160A2 Partial discharge measuring arrangement
09/04/1996EP0730159A2 Electromagnetic radiation measuring apparatus
09/03/1996US5552715 Apparatus for low cost electromagnetic field susceptibility testing
09/02/1996CA2167260A1 Partial-discharge measuring device
08/1996
08/29/1996WO1996026448A1 Process and machine for signal waveform analysis
08/29/1996DE19508769C1 Verfahren zur Bestimmung des Drehsinnes eines Drehstromnetzes und Schaltungsanordnung zur Durchführung des Verfahrens A method for determining the direction of rotation of a three-phase network and circuit arrangement for performing the method
08/29/1996DE19506504A1 Open transverse electromagnetic waveguide with electrode and counter electrode arranged at angle, for EMC testing
08/28/1996EP0728322A1 Microscopic electromagnetic radiation transmitter or detector
08/20/1996US5548820 Antenna and feeder cable tester
08/07/1996CN1128354A Electric field sensor capable of reliably measuring an electric field intensity of signal
08/06/1996US5543779 EMI source detector
08/06/1996US5543721 Method and device for extending the dynamic range in measurements c arried out with a directional coupler
07/1996
07/31/1996CN1128082A Electrical charge transfer apparatus
07/31/1996CN1127889A A partial discharge sensing device, in particular for use in a gas-insulated apparatus, and partial discharge measuring system using such a sensing device
07/30/1996US5541520 Filtering for electronic module test
07/30/1996US5541501 Lightning and storm warning method and apparatus
07/24/1996CN1127552A Method and apparatus for controlling the exposure to RF transmissions
07/23/1996US5539321 Apparatus for measuring the crosstalk in a cable