| Patents for G01R 19 - Arrangements for measuring currents or voltages or for indicating presence or sign thereof (29,850) |
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| 10/19/1999 | US5969926 Short circuit protection arrangement for an output buffer of an integrated circuit |
| 10/19/1999 | US5969574 Low voltage current sense amplifier |
| 10/19/1999 | US5969545 Peak detector circuit |
| 10/14/1999 | DE19844287C1 Effective value measurement for electric signal |
| 10/13/1999 | CN2343591Y Semi-conducting screen volume resistivity measurer |
| 10/13/1999 | CN2343590Y Automatic detector for operating condition of navigation lamp |
| 10/12/1999 | US5966675 Method and device for monitoring power supply networks |
| 10/12/1999 | US5966297 Large bandwidth analog isolation circuit |
| 10/06/1999 | EP0897542B1 Current sensor, in particular for low currents |
| 10/05/1999 | US5963405 Low cost apparatus for detecting arcing faults and circuit breaker incorporating same |
| 10/05/1999 | US5963062 Circuit |
| 10/05/1999 | US5963044 Method for acquiring measured values by comparison with a stepped ramp voltage |
| 10/05/1999 | US5963026 Method and device for the measurement of electric currents in at least two measuring ranges |
| 10/05/1999 | US5962932 Power supply apparatus with circuit load sensor |
| 09/30/1999 | DE19812813A1 Rail currents measurement method for rail track |
| 09/29/1999 | CN2341158Y Electric tester |
| 09/29/1999 | CN2341157Y Electrician waist band for alarming in short range of electric power |
| 09/29/1999 | CN2341156Y Post insulator style high voltage indicating and phase checking device |
| 09/29/1999 | CN1229923A Voltage indicator using serial comparison voltage measurement |
| 09/29/1999 | CN1229922A Current sensing circuit |
| 09/28/1999 | US5959464 Loss-less load current sensing driver and method therefor |
| 09/28/1999 | US5959463 Semiconductor test apparatus for measuring power supply current of semiconductor device |
| 09/28/1999 | US5959458 Method and apparatus for measuring electrical waveforms using atomic force microscopy |
| 09/28/1999 | US5959437 Charge and discharge control circuit |
| 09/28/1999 | US5959436 Charge and discharge control circuit having low voltage detecting means for preventing charging of an abnormal cell |
| 09/23/1999 | DE19908882A1 Digital comparator for semiconductor device inspection system |
| 09/23/1999 | DE19823706A1 Measuring apparatus for determining electric parameters of alternating voltage network |
| 09/22/1999 | EP0943926A1 Instrument for measuring voltages of cells |
| 09/22/1999 | CN2339995Y High-voltage and current combined meter |
| 09/22/1999 | CN1229195A Cell voltage detection circuit, and method of detecting cell votage |
| 09/22/1999 | CN1229193A Choppe type voltage comparing circuit and voltage comparing method |
| 09/22/1999 | CN1229192A Voltage measurement instrument having transient overvoltage input protection |
| 09/21/1999 | CA2146596C Loop current detector |
| 09/21/1999 | CA2049685C High impedance voltage indicator having capacitive voltage divider |
| 09/16/1999 | WO1999046608A1 Simultaneous display of primary measurement values and derived parameters |
| 09/16/1999 | WO1999036791A3 Peak detection apparatus |
| 09/16/1999 | CA2323085A1 Simultaneous display of primary measurement values and derived parameters |
| 09/15/1999 | EP0941481A1 Measuring instrument for a loaded dc/dc converter |
| 09/15/1999 | EP0941479A1 Circuit arrangement for accurately sensing a direct current derived from clocked electric input values |
| 09/14/1999 | US5952951 Chopper comparator and A/D converter |
| 09/14/1999 | US5952820 Foreign voltage detector |
| 09/10/1999 | WO1999045405A1 Magnetic digital signal coupler |
| 09/10/1999 | WO1999045402A1 Voltage measuring instrument with flying capacitor |
| 09/10/1999 | WO1999028755A9 Electronic circuits for detecting the earthing system and for testing the efficiency of residual current circuit-breakers connected to phase, neutral and earth of electrical users |
| 09/10/1999 | CA2320311A1 Magnetic digital signal coupler |
| 09/09/1999 | DE19909052A1 Protection initialization method for electronic release device |
| 09/08/1999 | CN2337564Y Tong-type AC small current sensor made with silicon-steel sheet iron core |
| 09/08/1999 | CN2337563Y Electric element with pre-alarming purpose at early time |
| 09/07/1999 | US5949597 Method and apparatus for data pulse qualification wherein the amplitude of a preceding pulse of opposite polarity is tracked |
| 09/07/1999 | US5949233 Circuit for detecting overcharging and overdischarging |
| 09/07/1999 | US5949231 Alternating current measuring device |
| 09/07/1999 | US5947909 Neural network polymorphic QRS detector |
| 09/02/1999 | DE19809825A1 Switching and control devices for power supply and distribution |
| 09/01/1999 | EP0939489A2 Chopper voltage comparator circuit and method |
| 09/01/1999 | EP0855036A4 Ac current sensor |
| 09/01/1999 | CN2336366Y Three color indicating device for voltage of power supply |
| 09/01/1999 | CN2336365Y User-friendly digital test pencil |
| 08/31/1999 | US5946471 For measuring physical parameters |
| 08/31/1999 | US5945853 Current sensing circuit with automatic offset compensation |
| 08/26/1999 | WO1999043010A2 Self-powered current monitor |
| 08/26/1999 | WO1999032891A3 Method for defining instantaneous value of current of pulse-controlled inductive load |
| 08/26/1999 | CA2319409A1 Self-powered current monitor |
| 08/25/1999 | EP0937988A1 Voltage indicator using serial comparison voltage measurement |
| 08/25/1999 | EP0789840B1 Current/voltage transformer for the detection of the electron current in a scanning tunnelling-electron microscope |
| 08/25/1999 | EP0757854B1 A window discriminator controlled current breaker |
| 08/25/1999 | CN1226682A RMS converter for obtaining fast RMS measurements |
| 08/24/1999 | US5943635 System and method for programmable brown-out detection and differentiation |
| 08/24/1999 | US5943205 Driver and overload protection circuit |
| 08/24/1999 | US5942920 Dual buffer peak detecting apparatus |
| 08/24/1999 | US5942889 Capacitive probe for in situ measurement of wafer DC bias voltage |
| 08/24/1999 | CA2064020C Fibre optic arrangement for measuring the strength of an electric current |
| 08/19/1999 | WO1999041618A1 Instrument for measuring alternating current |
| 08/18/1999 | CN2334100Y Releasing alarm earth wire clip |
| 08/18/1999 | CN2334036Y Test pencil for vehicle |
| 08/18/1999 | CN2334035Y Output high-voltage measuring arrangement for high-voltage generator |
| 08/17/1999 | US5940052 Current monitor for field emission displays |
| 08/17/1999 | US5939990 Method of indicating operation of backup battery and circuit for sensing the same |
| 08/17/1999 | US5939905 For detecting when a control loop loses control |
| 08/17/1999 | US5939902 Integrating circuit internally included in semiconductor device |
| 08/17/1999 | US5939874 Voltage detection circuit having comparator pairs with mutually connected inputs |
| 08/17/1999 | US5939873 Test fixture for a liquid recirculation unit |
| 08/17/1999 | US5939863 Power circuit providing reverse battery protection and current and temperature sensing |
| 08/12/1999 | DE19904060A1 Arrangement with voltage monitoring circuit, esp. for monitoring the voltage of a rechargeable battery |
| 08/11/1999 | EP0934627A1 Circuit arrangement for evaluating a binary signal defined by current threshold values |
| 08/11/1999 | EP0934533A1 Switching arrangement for monitoring leakage current |
| 08/10/1999 | US5936436 Substrate potential detecting circuit |
| 08/10/1999 | US5936435 For comparing a first dc voltage with a second dc voltage |
| 08/10/1999 | US5936395 Electro optic voltage sensor with optic fiber |
| 08/05/1999 | WO1999028755A3 Electronic circuits for detecting the earthing system and for testing the efficiency of residual current circuit-breakers connected to phase, neutral and earth of electrical users |
| 08/05/1999 | DE19756135C1 Extrapolating discriminator for determining starting point of analog signal, such as for high energy physics |
| 08/04/1999 | EP0933641A2 Automatic power turn-on circuit for a battery-powered voltage measurement apparatus |
| 08/03/1999 | US5933238 Optical current measurement device and method of manufacturing it |
| 08/03/1999 | US5933013 Calibration circuit for calibrating frequency characteristics of an AC/DC converter |
| 08/03/1999 | US5933010 Device to detect charging condition of a storage battery |
| 07/28/1999 | EP0932047A1 Semiconductor integrated circuit with pipelined 1-bit current AD convertors |
| 07/28/1999 | CN1224166A Method and apparatus for measurement of output high voltage of high-voltage generator |
| 07/28/1999 | CN1044405C Arrangement of circuit for processing of analogous current and voltage signals |
| 07/27/1999 | US5930745 Front-end architecture for a measurement instrument |
| 07/27/1999 | US5929679 Buffering circuit |
| 07/27/1999 | US5929626 System for measuring low current with contact making and breaking device |