Patents
Sitemap › G01 - Measuring; Testing › G01R - Measuring electric variables; Measuring magnetic variables › G01R 19 - Arrangements for measuring currents or voltages or for indicating presence or sign thereof
Patents for G01R 19 - Arrangements for measuring currents or voltages or for indicating presence or sign thereof (29,850)
08/1998
08/20/1998DE19705768A1 Stromsensor nach dem Kompensationsprinzip Current sensor according to the compensation principle
08/20/1998DE19702602C1 Driver- and overload protection circuit for electric switch arrangement
08/19/1998CN2288450Y High-voltage liquid crystal display device
08/18/1998US5796631 Method and apparatus for monitoring and characterizing power quality, faults and other phenomena in network power systems
08/18/1998US5796285 Voltage-limiting circuit with hysteresis comparator
08/18/1998US5796275 High voltages detector circuit and integrated circuit using same
08/18/1998US5796232 Circuit configuration for the evaluation of sensor signals of inductive sensors in motor vehicles
08/18/1998CA2214241A1 Rms converter using digital filtering
08/13/1998DE19802831A1 Appliance for measuring alternating current which saturate the current transformer core using secondary currents up to saturation point
08/12/1998CN2287727Y 多功能电路测试器 Multi-function circuit tester
08/12/1998CN2287726Y Grip type DC current meter
08/11/1998CA2078795C Voltage stabilizing circuit
08/06/1998WO1998034316A1 Power supply monitoring integrated circuit device and battery pack
08/06/1998CA2279193A1 Power supply monitoring integrated circuit device and battery pack
08/06/1998CA2228538A1 Polarity testing probe and led cartridge assembly
08/05/1998CN2287308Y Multifunctional auto-monitor for secondary batteries
08/05/1998CN1189620A Apparatus and method for measuring AC current which saturates core of current transformer using values of secondary current up to saturation
08/04/1998US5790037 Polarity indicator for a battery
08/04/1998US5789934 Test circuit including a power supply with a current transformer to monitor capacitor output current
08/04/1998US5789923 Battery remaining capacity measuring device
08/04/1998US5789911 Polarity testing probe and LED cartridge assembly
08/04/1998US5788681 Multi-lumen endoscopic catheter
08/04/1998CA2126843C Peak amplitude detector
07/1998
07/29/1998EP0855103A1 Peak detector and use thereof
07/29/1998EP0855036A1 Ac current sensor
07/29/1998CN1189216A Circuit for detecting level or level variation of input direct voltage
07/28/1998CA2105270C Electro-optic sampling
07/23/1998WO1998018013A3 Energy meter with power quality monitoring and diagnostic systems
07/22/1998EP0854365A2 Numerical comparator
07/22/1998EP0853765A1 Verdet constant temperature-compensated current sensor
07/22/1998EP0535222B1 Digital battery capacity warning device
07/22/1998CN1039269C Semiconducotr composite element, and method of detecting abnormal conditions in inverter device having element
07/21/1998US5783951 Small current detector circuit and locator device using the same
07/21/1998US5783805 Electrothermal conversion elements, apparatus and methods for use in comparing, calibrating and measuring electrical signals
07/16/1998WO1998031092A1 Current-sensing mosfets in paralleled mosfet power circuit
07/16/1998WO1998031087A1 Integrated circuit device for monitoring power supply
07/16/1998DE19737777A1 Decision circuit for switching to back-up power supply e.g. for sequence or run-off control unit, counter etc
07/16/1998DE19652077A1 Method to scan and measure periodic signals for recording voltage wave shapes
07/16/1998CA2278329A1 Integrated circuit device for monitoring power supply
07/15/1998CN2286315Y Multi-phase mounting rectification system AC ammeter
07/14/1998US5781043 Direct current sum bandgap voltage comparator
07/14/1998US5780942 Input circuit and semiconductor integrated circuit device including same
07/14/1998US5780847 Verdet constant temperature-compensated current sensor
07/08/1998CN1187243A Open sensor diagnostic system for temperature transmitter in a process control system
07/07/1998US5777833 Electronic relay for calculating the power of a multiphase electric load based on a rectified wave signal and a phase current
07/07/1998US5777494 Signal discrimination circuit for unknown signal amplitude and distortion
07/07/1998CA2130045C Multiple input comparator circuit for a switched resistive network
07/01/1998EP0851583A1 Data processing system having an auto-ranging low voltage detection circuit
07/01/1998EP0851434A2 Sample hold circuit and semiconductor device having the same
07/01/1998CN2285478Y Glow discharge current isolation sampler
07/01/1998CN2285477Y Digital double-clamping phase volt-ampere meter
06/1998
06/30/1998US5773991 Motor current sense circuit using H bridge circuits
06/25/1998DE19652698A1 Precision measurement system for AC and other electrical dimensions fluctuating over time
06/24/1998CN2284962Y Power supply detector
06/23/1998US5770956 Measurement amplifier
06/18/1998WO1998026499A1 Improved switched reluctance motor drive control system
06/18/1998DE19725459A1 Bias voltage level detector
06/17/1998EP0787304A4 Numerical comparator
06/16/1998US5768342 Telephone system loop current detector
06/16/1998US5768155 Fast undersampling
06/16/1998US5767688 For detecting a voltage of a sample
06/16/1998US5767667 For measuring the flow of line current
06/16/1998CA2168359C Method and apparatus for rms current approximation
06/16/1998CA2104978C Optical voltage-electric field sensor
06/11/1998WO1998025154A1 Measuring instrument for a loaded dc/dc converter
06/11/1998WO1998025149A1 Circuit arrangement for accurately sensing a direct current derived from clocked electric input values
06/09/1998US5764142 Fire alarm system with smoke particle discrimination
06/09/1998US5764086 Comparator circuit with wide dynamic range
06/09/1998US5764048 Ultra high accuracy voltage measurement system
06/09/1998US5764046 Optical method and device for measuring an alternating electrical current with temperature compensation
06/09/1998US5764044 Process for producing time dependent waveforms of positive and negative symmetrical sequence components of a power system's voltages or currents
06/04/1998DE19649788A1 Meßvorrichtung für einen belasteten Gleichspannungswandler Measuring device for a loaded DC-DC converter
06/04/1998DE19649525A1 Method for data reduced signal sampling, storing and representing of analog electric input signal
06/03/1998EP0757796B1 Device for connecting a voltage display apparatus to a sensor
06/03/1998CN2283262Y Electrical leakage, discharge monitor for lightning arrester
06/02/1998US5760720 Digital trimming of on-chip analog components
06/02/1998US5760615 Zero current enable circuit
06/02/1998US5760614 Potential detecting circuit and semiconductor integrated circuit
06/02/1998US5760613 Method and corresponding circuit detecting an open load
06/02/1998US5760573 Plasma density monitor and method
06/02/1998US5760568 Method and apparatus for charging a battery and for determining a voltage of the battery during charging
05/1998
05/28/1998WO1998011641A3 Digital current differential system
05/26/1998US5757357 Method and system for displaying digital data with zoom capability
05/26/1998US5757209 Extremum voltage supply circuit with improved switching
05/26/1998US5757174 Current sensing technique using MOS transistor scaling with matched current sources
05/20/1998EP0843398A2 Backup battery switch
05/20/1998EP0842437A1 Vcc level detection circuit
05/20/1998EP0779988B1 Process and device for measuring an alternating electric current with temperature compensation
05/20/1998EP0776477B1 Method and device for the measurement of electric currents in at least two measurement ranges
05/20/1998DE19749392A1 Strommeßschaltung Current measuring circuit
05/20/1998CN2282193Y Acousto-optic display multifuncional test pencil
05/20/1998CN2282192Y Guage for measuring igniting winding high voltage peak value
05/19/1998US5754942 Satellite power level monitoring system and method using digital signal processing
05/19/1998US5754440 Apparatus for harmonic analysis of waveforms in an AC electrical system
05/19/1998US5754041 Device for measuring voltage/current characteristics with means to prevent output transients during changes in settings
05/19/1998US5753841 PC audio system with wavetable cache
05/19/1998CA2086640C Electrical contact avoidance device
05/14/1998CA2402600A1 Sensing device for a powerline
05/13/1998EP0841532A1 Method and apparatus for measuring electrical waveforms using atomic force microscopy
05/13/1998CN1181504A Two-input three-phase phase-sequence sampling circuit
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