| Patents for G01R 19 - Arrangements for measuring currents or voltages or for indicating presence or sign thereof (29,850) |
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| 01/28/1999 | WO1998048525A3 An arrangement in a subscriber line interface circuit |
| 01/28/1999 | WO1998043100A3 Current and voltage sensing |
| 01/28/1999 | DE19726231A1 Verfahren zur Drehsinnerfassung in Drehstromnetzen, Anwendung dieses Verfahrens und zugehöriges digitales Überlastrelais Method for detection of rotation in three-phase systems, application of this method and corresponding digital overload relay |
| 01/27/1999 | EP0893869A2 Circuit for causing a voltage step in a multi-cell battery |
| 01/27/1999 | CN2305784Y Socket with automatically displaying electrical leakage |
| 01/27/1999 | CN2305675Y Detector for molten drop necking down |
| 01/27/1999 | CN1206112A Method and apparatus for measuring mean square value of electrical signal |
| 01/26/1999 | US5864247 Voltage detection circuit, power-on/off reset circuit, and semiconductor device |
| 01/26/1999 | US5864219 Circuit for detecting a level or a variation of an input direct voltage |
| 01/25/1999 | CA2243803A1 A circuit for causing a voltage step in a multi-cell battery |
| 01/21/1999 | DE19829840A1 Battery charging method with detection of fully charged state |
| 01/21/1999 | DE19728596A1 Potentiometer monitoring method |
| 01/20/1999 | EP0892272A2 Method and apparatus for measuring the mean square value of an electrical signal |
| 01/20/1999 | EP0716747B1 An improved-sensitivity high-resolution comparator |
| 01/20/1999 | CN1205484A Integrating circuit internally included in semiconductor device |
| 01/19/1999 | US5862185 Data signal zero crossing detection process |
| 01/19/1999 | US5861882 Integrated test and measurement means employing a graphical user interface |
| 01/19/1999 | US5861683 Panelboard for controlling and monitoring power or energy |
| 01/19/1999 | CA2164620C Method of predicting voltages in telephone line measurement |
| 01/14/1999 | WO1999001773A1 Electric current pick-up shoe |
| 01/13/1999 | EP0890844A2 Circuit for monitoring a load current |
| 01/13/1999 | CN1205126A Digital current differential system |
| 01/12/1999 | CA2152497C Method and apparatus for detecting an input signal level |
| 01/06/1999 | CN2303303Y Locomotive test pencil |
| 01/06/1999 | CN1041560C Continuous detecting apparatus and method for thermoelectric potential homogeneity of thermocouple wire material |
| 12/30/1998 | WO1998059253A1 Method for detecting the direction of rotation in three-phase networks, use of said method and pertaining digital overload relay |
| 12/30/1998 | WO1998059251A2 Method and apparatus for indicating an alternating voltage |
| 12/30/1998 | WO1998059250A2 Electrical tester for small motor vehicles |
| 12/30/1998 | EP0887648A2 Discriminating circuit for differentiating between high voltage DC and high voltage AC |
| 12/30/1998 | EP0886782A1 Apparatus for measuring parameters of an electronic device |
| 12/29/1998 | US5854996 Logic signal extraction |
| 12/29/1998 | US5854555 Method and apparatus for detecting an abnormal current in automotive wiring harnesses |
| 12/29/1998 | CA2075741C Sampling methods and apparatus |
| 12/29/1998 | CA2028390C Hot line indicator |
| 12/29/1998 | CA2024243C Circuit status indicator having liquid crystal display |
| 12/23/1998 | EP0886377A1 A chopper-type voltage comparator |
| 12/23/1998 | EP0886126A1 Signal processing and method for processing a measuring signal from a detector of a weighing device |
| 12/23/1998 | EP0866975A4 Electro-optic voltage sensor |
| 12/23/1998 | EP0829125B1 Revenue accuracy meter having power quality measurement and method of measuring power quality |
| 12/23/1998 | CN2301731Y Domestic test pencil |
| 12/23/1998 | CN1202623A Front-end architecture for measurement instrument |
| 12/17/1998 | DE19723456A1 Fault detection device for electrical load |
| 12/16/1998 | EP0783798B1 Circuit arrangement for evalutating the output signal from an active sensor |
| 12/16/1998 | CN2301001Y Plug capable of testing socket perfectness |
| 12/16/1998 | CN2300918Y AC current value linear signal sensor |
| 12/16/1998 | CN2300917Y Portable monobody dc high-voltage tester |
| 12/16/1998 | CN1202255A Automatic voltage detection in multiple voltage applications |
| 12/16/1998 | CN1202249A Concatenated magneto-optic field sensors |
| 12/16/1998 | CN1201929A Power-on reset circuit applied to semiconductor integrated circuit device |
| 12/10/1998 | WO1998040753A3 High voltage installation with a device for transmitting signals |
| 12/10/1998 | DE19825029A1 Current measurement circuit to measure current through electrical path |
| 12/09/1998 | CN1201287A Charging and discharging control circuit |
| 12/09/1998 | CN1201172A Electric-wave-shape digital sampling method and apparatus thereof |
| 12/09/1998 | CN1201147A Voltage-change detecting circuit and input device of alarm thereof |
| 12/08/1998 | US5848380 Method and system for estimation of cell discharge stop voltage |
| 12/08/1998 | US5848365 Diagnostic method and system for electrical system in a truck |
| 12/08/1998 | US5847587 Means for instantaneously detecting abnormal voltage in a micro controller |
| 12/08/1998 | US5847570 Low jitter trigger circuit for electro-optic probing apparatus |
| 12/08/1998 | US5847569 Electrical contact probe for sampling high frequency electrical signals |
| 12/08/1998 | US5847560 Process and device for measuring an alternating electric current with temperature compensation |
| 12/02/1998 | EP0881769A2 Abnormal current detection circuit and load drive circuit including the same |
| 12/02/1998 | EP0881732A2 Apparatus for RMS current approximation |
| 12/02/1998 | CN2299408Y Single phase plug with illumination indication |
| 12/01/1998 | US5845275 Current measurement circuit |
| 12/01/1998 | US5845231 Apparatus and method for power disturbance analysis and dynamic adaptation of impulse memory storage size |
| 12/01/1998 | US5844884 Battery monitoring |
| 12/01/1998 | US5843028 Method of dilating a duct of a patient |
| 11/25/1998 | EP0879420A1 Improved charge rate electrometer |
| 11/24/1998 | US5841649 Current-sensing mosfets in paralleled mosfet power circuit |
| 11/24/1998 | US5841286 Oscilloscope with detection of anomalous events during blind intervals |
| 11/24/1998 | US5841284 Apparatus for monitoring power of battery to supply electric power to load |
| 11/19/1998 | WO1998052055A1 Generator and method for measuring the voltage of same |
| 11/19/1998 | DE19719970A1 Generator und Verfahren zur Messung einer Generatorspannung Generator and method for measuring a generator voltage |
| 11/18/1998 | EP0878717A2 Circuit for measuring in-circuit resistance and current |
| 11/18/1998 | EP0877946A1 Method of detecting an abrupt variation in an electrical alternating quantity |
| 11/18/1998 | EP0771501B1 Data signal zero crossing detection process |
| 11/18/1998 | CN1199264A Charge and discharge control circuit |
| 11/18/1998 | CN1199173A Circuit for measuring in-circuit resistance and current |
| 11/17/1998 | US5839060 Logarithmic level detector and a radio receiver |
| 11/17/1998 | US5838173 Device and method for detecting a low voltage in a system |
| 11/17/1998 | US5838171 Low power real-time clock circuit having system and battery power arbitration |
| 11/17/1998 | US5838152 Pulse timer circuit |
| 11/17/1998 | US5838143 Automatic battery polarity identification circuit having electrode plates, capacitor and relays |
| 11/17/1998 | US5836156 Driving device of sensors and actuators |
| 11/17/1998 | CA2124484C Electrostatic voltmeter |
| 11/11/1998 | EP0877515A2 Circuit for converting unipolar input to bipolar output |
| 11/11/1998 | EP0679128B1 An apparatus forming a junction box comprising a shunt busbar disposed therein |
| 11/11/1998 | CN1198532A 220 KV active optical fibre voltage transformer |
| 11/10/1998 | US5834973 Voltage isolation circuit for a measurement channel |
| 11/10/1998 | US5834967 Semiconductor integrated circuit device |
| 11/10/1998 | US5834958 Power on system |
| 11/10/1998 | US5834954 Integrated comparator circuit |
| 11/10/1998 | US5834953 High speed current sense amplifier |
| 11/10/1998 | US5834934 Inductive current sensor with reduced influence of spurious gaps and electrical apparatus including it |
| 11/10/1998 | US5834930 Device for sensing the period of a digitized signal including noise evaluation and averaging over a plurality of zero crossing |
| 11/10/1998 | US5834910 Ac motor controlling apparatus |
| 11/10/1998 | US5833365 Method for local temperature sensing for use in performing high resolution in-situ parameter measurements |
| 11/05/1998 | WO1998049566A1 Polarity identification circuit |
| 11/04/1998 | EP0875765A1 Voltage isolation circuit for a measurement channel |
| 11/04/1998 | EP0875090A1 Connector, in particular a plug-in connector for tt and tn networks |