| Patents for G01R 19 - Arrangements for measuring currents or voltages or for indicating presence or sign thereof (29,850) |
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| 01/06/2000 | WO2000000835A1 Device having processor means and having undervoltage detection means |
| 01/06/2000 | WO2000000834A1 Residual current detection device |
| 01/06/2000 | WO2000000833A1 Current detector and current measurement apparatus including such detector |
| 01/05/2000 | EP0969543A2 Battery with integral condition tester |
| 01/05/2000 | DE19826717A1 Electrical voltage tester with low-voltage neon glow lamp |
| 01/04/2000 | US6011680 Connector, in particular a plug-in connector for TT and TN networks |
| 01/04/2000 | US6011447 Power-on reset circuit applied to semiconductor integrated circuit device |
| 01/04/2000 | US6011413 Structure of current measuring circuit |
| 01/04/2000 | CA2153274C Power-out reset system |
| 01/04/2000 | CA2073901C Battery with integral condition tester |
| 12/30/1999 | DE19928443A1 Measuring electrical potential differences, especially caused by low frequency coupling voltages, for house testing in living and working quarters |
| 12/29/1999 | WO1999067653A1 Layered current sensor |
| 12/29/1999 | EP0966791A1 Evaluation of a pulse-width modulation signal |
| 12/29/1999 | EP0966781A1 Circuit interrupter having improved current sensing apparatus |
| 12/29/1999 | EP0966688A2 High voltage installation with a device for transmitting signals |
| 12/29/1999 | EP0797802A4 Digital trimming of on-chip analog components |
| 12/29/1999 | CN2356354Y Pocket clamp shape digital meter |
| 12/28/1999 | US6008927 Optical fiber modulator having an optical fiber having a poled portion serving as an electrooptic element and method for making same |
| 12/28/1999 | US6008664 Parametric test system and method |
| 12/28/1999 | US6008643 Offset reduction and separation of hall and piezoresistive voltages through current injection |
| 12/28/1999 | CA2021975C Method of receiving pulses of the m.l.s. type and system for implementing this method |
| 12/22/1999 | EP0965046A1 Method and device for measuring an electrical voltage |
| 12/22/1999 | EP0900418A4 Method and apparatus for sensing current in power supplies |
| 12/22/1999 | CN2355336Y Railways signal inspector |
| 12/22/1999 | CN2355335Y Peak current inspector for wireless fault determiner for high voltage transmission lines |
| 12/21/1999 | US6005759 Method and system for monitoring and controlling an electrical distribution network |
| 12/21/1999 | US6005393 Method of determining an earth-fault current |
| 12/21/1999 | CA2013541C System for detecting voltage pulses of a particular magnitude |
| 12/16/1999 | WO1999065145A1 Threshold operation circuit and gate circuit using it, self-holding circuit and start signal generation circuit |
| 12/16/1999 | WO1999064877A1 System for digital measurement of breakdown voltage of high-voltage samples |
| 12/16/1999 | WO1999064876A1 System for concurrent digital measurement of peak voltage and rms voltage in high voltage system |
| 12/16/1999 | WO1999064875A1 Current measuring device and telephone terminal using such a current measuring device |
| 12/16/1999 | WO1999064872A2 Electrical power system phase sequence tester device |
| 12/16/1999 | DE19844729A1 Current sensor with magnet core with at least one sec. winding besides primary winding for current to be measured and |
| 12/15/1999 | CN2354147Y Digit-analog double-display current meter |
| 12/15/1999 | CN2354146Y Digit-analog double-display voltmeter |
| 12/15/1999 | CN2354145Y Pocket digital multimeter |
| 12/15/1999 | CN1047442C Open sensor diagnostic system for temp. transmitter in process control system |
| 12/09/1999 | DE19911098A1 Voltage decision circuit for charging type battery used in mobile telephone |
| 12/08/1999 | CN1238043A Circuit arrangement for accurately sensing direct current derived from clocked electric input values |
| 12/07/1999 | US5999005 Voltage and displacement measuring apparatus and probe |
| 12/07/1999 | US5998985 Voltage indicator using serial comparison voltage measurement |
| 12/07/1999 | US5998970 Battery charging operation and a detection of a fully charged condition of the charged battery |
| 12/02/1999 | WO1999062169A1 Method and circuit for power detection in electronically switched electric motors |
| 12/02/1999 | WO1999061925A1 Method for improving the accuracy in the determination of a waveform center |
| 12/02/1999 | DE19928275A1 Pocket lamp with accumulator rechargeable across plug box for professionals and craftsmen such as painters or electricians or DIY people |
| 12/02/1999 | CA2334281A1 Method for improving the accuracy in the determination of a waveform center |
| 12/01/1999 | EP0961126A1 Monitoring of low currents through a low-side driven DMOS by modulating its internal resistance |
| 12/01/1999 | EP0961120A2 Smart auto-ranging rms measurement method and apparatus |
| 12/01/1999 | EP0960342A1 Current sensor with self-oscillating generator circuit |
| 12/01/1999 | EP0960341A1 Current detector working in accordance with the compensation principle |
| 11/30/1999 | US5995011 Voltage monitoring circuit and voltage monitoring method with hysteresis characteristic |
| 11/30/1999 | US5994927 Circuit for comparison of signal voltage with reference voltage |
| 11/30/1999 | US5994905 Frequency domain reflectometer and method of suppressing harmonics |
| 11/30/1999 | US5994888 Semiconductor device reducing voltage consumption in voltage-detection circuit |
| 11/30/1999 | US5994790 Method of detecting abnormal electric current in vehicle apparatus for detecting abnormal electric current in vehicle and power supply apparatus for vehicle |
| 11/25/1999 | WO1999060691A1 Measuring bridge with integrated intelligence |
| 11/25/1999 | WO1999060414A2 Voltage level indicator |
| 11/24/1999 | CN2350773Y 安全试电笔 Safety test pencil |
| 11/24/1999 | CN1236105A Smart auto-ranging RMS measurement method and apparatus |
| 11/23/1999 | US5990700 Input buffer circuit and method |
| 11/18/1999 | DE19821953A1 Instrument transformer for current and voltage measurement used in monitoring and control or automation of medium and large |
| 11/17/1999 | CN2349581Y Multi-cup insulation oil voltage-resistant tester |
| 11/16/1999 | US5987392 Wave form peak detector |
| 11/16/1999 | US5987195 Fiber optics apparatus and method for accurate current sensing |
| 11/16/1999 | US5986865 Battery protection device and a battery device employing such a battery protection device |
| 11/16/1999 | US5986456 Surface potential sensor and processing circuit having improved noise reduction |
| 11/16/1999 | US5986441 Circuit configuration for capturing the load current of a power semiconductor component with a load on the source side |
| 11/16/1999 | CA2188305C Self-powered powerline sensor |
| 11/11/1999 | WO1999057578A2 Ac current sensor having high accuracy and large bandwidth |
| 11/11/1999 | WO1999057568A1 Method and circuit for measuring a current |
| 11/11/1999 | DE19822127A1 Verfahren und Schaltungsanordnung zur Stromerfassung Method and circuit for current detection |
| 11/11/1999 | DE19817535A1 Device for determination of DC measurements from AC circuits |
| 11/11/1999 | CA2333616A1 Ac current sensor having high accuracy and large bandwidth |
| 11/10/1999 | EP0955547A2 Electro-optic sampling oscilloscope |
| 11/10/1999 | EP0954898A1 Current-sensing mosfets in paralleled mosfet power circuit |
| 11/10/1999 | CN2348402Y High voltage live display device |
| 11/09/1999 | US5982165 RF circuit for use in a combined leakage detector and signal level monitor |
| 11/09/1999 | US5982160 DC-to-DC converter with inductor current sensing and related methods |
| 11/04/1999 | WO1999056074A2 Element comprising a layer structure and a current-directing means |
| 11/04/1999 | DE19818974A1 Internal impedance determination of AC voltage source |
| 11/03/1999 | EP0953846A2 Electro-optic sampling oscilloscope |
| 11/03/1999 | CN2347180Y Phase failure electronic warner for electric motor |
| 11/03/1999 | CN1234120A Energy meter with power quality monitoring and diagnostic system |
| 11/02/1999 | US5978742 Method and apparatus for digital sampling of electrical waveforms |
| 10/28/1999 | WO1999054976A1 Method for adapting a protective relay to the mains frequency, and a protective relay |
| 10/28/1999 | DE19910755A1 Linear current sensing circuit for motor controller |
| 10/27/1999 | EP0952455A1 High frequency track&hold full wave rectifier |
| 10/27/1999 | CN2345985Y High-voltage alarm |
| 10/26/1999 | US5974577 Integrated circuit with voltage over-stress indicating circuit |
| 10/26/1999 | US5974361 Waveform reconstruction from distorted (saturated) currents |
| 10/26/1999 | US5973551 Abnormal current detection circuit and load drive circuit including the same |
| 10/26/1999 | US5973497 Method of determining and displaying battery charge status |
| 10/26/1999 | US5973486 Differential power sensor circuit |
| 10/26/1999 | CA2074827C Integrated optics pockels cell voltage sensor |
| 10/21/1999 | WO1999053425A1 Apparatus and method for improved dynamic range and response time in a logarithmic amplifier |
| 10/20/1999 | EP0950281A1 Improved switched reluctance motor drive control system |
| 10/20/1999 | CN2344905Y Thunderstroke display device for high voltage transmission and distribution line |
| 10/20/1999 | CN1232183A Automatic power turn-on circuit for battery-powered voltage measurement apparatus |
| 10/19/1999 | US5969958 Method for measuring phase currents in an inverter |