| Patents for G01R 19 - Arrangements for measuring currents or voltages or for indicating presence or sign thereof (29,850) |
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| 12/14/1993 | US5270638 Probe device for testing polarity of a power supply and polarity of test element with respect to the power supply |
| 12/14/1993 | CA1325280C Programmable threshold data detection system |
| 12/09/1993 | WO1993024996A1 Automatic calibration system for a ramp voltage generator |
| 12/09/1993 | DE4221113C1 Comparator circuit e.g. for optical detector which signals presence of object - uses two comparators to provide two different outputs when input rises above or drops below switch threshold |
| 12/09/1993 | DE4218633A1 Critical current density measurer for high temp. superconducting films - contains direct magnetic field source and Hall probe device with several elements |
| 12/08/1993 | CN1079304A AC current comparator |
| 12/07/1993 | US5268628 Phase voltage measuring device of an AC motor and a measuring method thereof |
| 12/07/1993 | US5268595 Voltage detector for producing output signal without transient error level |
| 12/07/1993 | CA1325037C Rms measuring apparatus for ac/dc voltages |
| 12/07/1993 | CA1324896C Primary and secondary optical sensor device |
| 12/01/1993 | CN2148410Y high voltage live display protector |
| 12/01/1993 | CN1079053A AC/dc current comparison instrument |
| 11/25/1993 | WO1993023757A1 High-speed, high-impedance external photoconductive-type sampling probe/pulser |
| 11/25/1993 | DE4215899C1 Difference current detection system - uses annular core with two opposing gaps each with magnetic field sensor enclosing symmetrical current leads |
| 11/24/1993 | EP0570470A1 Battery tester. |
| 11/24/1993 | CN2147544Y Safety electric testing pen |
| 11/24/1993 | CN2147542Y Scan digital display three-phase electric voltage (current) meter |
| 11/18/1993 | EP0570148A2 Electrostatic voltmeter employing high voltage integrated circuit devices |
| 11/17/1993 | CN2146716Y Voltage-detecting AC digital instrument |
| 11/16/1993 | US5262711 Charging generator for a vehicle including a circuit for suppressing a sudden change in a field current |
| 11/16/1993 | US5262682 Level converter circuit having two multi-collector transistors for simplifying circuit configuration |
| 11/11/1993 | DE4215184A1 Detecting differential currents for fault current circuit breaker - using magnetic flux induced state change in medium not contg. secondary winding |
| 11/09/1993 | US5260647 Measuring an AC signal value with sampling when the sampling interval does not exactly divide the AC signal's period |
| 11/03/1993 | EP0568440A1 Detection circuit having voltage thresholds |
| 11/03/1993 | EP0568422A1 Voltage comparator with very low consumption |
| 11/03/1993 | EP0568198A2 Integrated circuit for physiological signal measurement |
| 11/03/1993 | EP0567683A1 Device for determining the excitation voltage amplitude of a resolver |
| 11/02/1993 | US5258703 Temperature compensated voltage regulator having beta compensation |
| 10/26/1993 | US5256968 Measurement of high-frequency electrical signals by electro-optical effect |
| 10/26/1993 | US5256872 Device for measuring current by optic fiber and dual polarization analysis |
| 10/26/1993 | CA2004340C Zero voltage crossover detector for polyphase systems |
| 10/20/1993 | EP0566160A1 Bridge type measuring device with output compensating circuit |
| 10/20/1993 | CN2144312Y Multifunctional miniature electric tool |
| 10/20/1993 | CN1077539A Method of measure of voltage and/or intensity of field and sensor used for same |
| 10/19/1993 | US5255202 Digital signal processing method and system, electric power system signal processing system and electric power control system |
| 10/19/1993 | US5254992 Low power electronic measuring system |
| 10/19/1993 | US5254951 Circuit for measuring discharging and charging current of a battery providing offset/drift voltage for correcting amplifier output |
| 10/19/1993 | US5254881 Master-slave peak detector |
| 10/13/1993 | EP0565326A2 Electrical fault detector |
| 10/12/1993 | US5253180 Apparatus and method for diagnosis of power appliances |
| 10/12/1993 | US5252928 Charge amplifier circuit |
| 10/08/1993 | CA2093473A1 Electrical fault detector |
| 10/06/1993 | CN2143334Y Multifunctional and high sensible voltage tester |
| 10/06/1993 | CN1077032A Monitor instrument for accumulator and d.c power supply system |
| 10/05/1993 | US5251150 Sub-modular development system for modular computer-based instruments |
| 09/29/1993 | EP0562989A1 Procedure and apparatus for measuring phase noise of sinusoidal signal generators |
| 09/28/1993 | US5249150 Process and circuit to determine estimates of the instantaneous value of parameters of at least one sinusoidal signal with constant and known frequency which is an additive component of a measuring signal |
| 09/21/1993 | US5247244 Electro-optic voltage measuring system with temperature compensation |
| 09/15/1993 | CN1076283A Modularized dc digital voltmeter |
| 09/14/1993 | US5245278 Device for the processing of a signal coming from a sensor with a derivative type of response |
| 09/14/1993 | US5245223 CMOS latching comparator |
| 09/08/1993 | EP0559243A1 Comparator circuit comprising input signal attenuator |
| 09/08/1993 | CN2141898Y Multifunctional combined test screw-driver |
| 09/07/1993 | US5243625 Receiver for multivalued digital signals |
| 09/07/1993 | US5243537 Method and apparatus for rapid measurement of AC waveform parameters |
| 09/07/1993 | US5243488 Protection circuit limiting overvoltages between two selected limits and its monolithic integration |
| 09/07/1993 | US5243275 Input protecting mechanism for measuring device |
| 09/02/1993 | WO1993017522A1 A modulator circuit |
| 09/02/1993 | WO1993017350A1 Current monitoring circuit having controlled sensitivity to temperature and supply voltage |
| 09/02/1993 | WO1993017346A1 Process and sensor for measuring electric voltages and/or electric field intensities |
| 09/01/1993 | CN2141350Y Electricity testing screwdriver |
| 08/31/1993 | US5241444 Adaptive trip fault current indicator |
| 08/31/1993 | CA1321820C Digital circuit interrupter with selectable trip parameters |
| 08/26/1993 | DE4205509A1 Verfahren und sensor zum messen von elektrischen spannungen und/oder elektrischen feldstaerken Method and sensor for measuring electrical voltages and / or electric field strengths |
| 08/25/1993 | EP0556549A1 A discriminator device |
| 08/25/1993 | CN2141085Y Acoustooptic instrument for measuring voltage |
| 08/24/1993 | US5239209 Zero crossing detection circuit |
| 08/18/1993 | EP0555702A2 Circuit device for the potential-free measurement of a pulsed dc-current |
| 08/18/1993 | CN2140525Y Multifunctional acoustooptic low voltage test pencil |
| 08/18/1993 | CN1075365A Method for measurement of resistive current first harmonics of gapless metal oxide lightning arrester and its apparatus |
| 08/17/1993 | US5237493 Current-to-voltage converter with low noise, wide bandwidth and high dynamic range |
| 08/17/1993 | US5237265 Fiber optics arrangement for measuring the intensity of an electric current |
| 08/17/1993 | US5237222 Comparator circuit for an integrator |
| 08/17/1993 | CA2016528C Battery system |
| 08/15/1993 | CA2061272A1 Peak and trough detection circuit |
| 08/11/1993 | CN2140066Y Multifunction voltage indicator for automobile storage battery |
| 08/10/1993 | US5235505 Overcurrent detector |
| 08/10/1993 | US5235224 Current detecting circuit using pulse transformer |
| 08/05/1993 | WO1993015548A1 Current control switching circuit with current decrease prediction |
| 08/05/1993 | WO1993009599A3 Analog-to-digital converter and method of fabrication |
| 08/05/1993 | DE4302533A1 Single pole AC voltage detector - has plug electrode with twin conductors capacitively coupled to LED display module and internal battery to test all components |
| 08/04/1993 | EP0554188A1 Device for measuring electrical variables |
| 08/04/1993 | CN2139420Y Shengong measuring instrument |
| 07/28/1993 | CN2139317Y Switch lock plug for 220V power wire under voltage |
| 07/22/1993 | DE4201021A1 Circuit for measuring small currents in semiconductors with leakage current compensation - contains tapping point with artificially raised potential achieved via one or more PN junctions |
| 07/21/1993 | EP0551858A2 Duobinary to binary decoder |
| 07/21/1993 | EP0551742A1 Zero temperature coefficient comparator circuit with hysteresis |
| 07/20/1993 | US5229725 Electrical fault detector in remote systems using a saturable core |
| 07/20/1993 | CA1320536C Apparatus and method for processing simultaneous radio frequency signals |
| 07/15/1993 | DE4200636A1 Arrangement for measuring plasma parameters in high frequency discharges - contains Langmuir plasma probe and high frequency filter for modulation suppression |
| 07/14/1993 | EP0551029A1 Device for converting a very low amplitude DC signal in an AC signal |
| 07/14/1993 | EP0250479B1 Current metering apparatus |
| 07/13/1993 | US5227740 Oscillation maintenance circuit |
| 07/08/1993 | WO1993013428A1 Current sensor |
| 07/08/1993 | DE4300108A1 Semiconductor device with good voltage seizing characteristics - comprises semiconductor region of second conducting type formed in surface of substrate |
| 07/08/1993 | DE4205300C1 Digital determination of phase and amplitude of periodic signal in phase locked loop - sampling periodic signal using sampling period to give constant whole number of measured value samples and phase estimates per period |
| 07/07/1993 | CN1074042A Measuring current and voltage with zero sequence mutual inductor measuring unbalance current method |
| 07/06/1993 | US5225784 DC Current comparator circuit for generating an adjustable output proportional to an input signal |
| 07/06/1993 | CA1319951C Automatic charger capable of charging several batteries |
| 06/30/1993 | EP0548725A1 Device for the evaluation of the voltage provided by a voltage supply |