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| Number | Title | Issue Date |
| 8134357 | Multi-electrode measuring system The invention provides a multi-electrode measuring system including a front end device which is a sensing device including a multi-electrode sensing device having a plurality of electrodes; a multi-channel fixture coupled to the multi-electrode sensing device; and a... | 03/13/2012 |
| 8111061 | Multi-output determination circuit An embodiment of the present invention provides a multi-output determination circuit that determines whether or not any one input voltage of a plurality of input voltages is equal to or higher than an upper-limit voltage value. This multi-output determination circui... | 02/07/2012 |
| 7923988 | Test equipment and test system using the same A test equipment to test power over Ethernet (PoE) function of an Ethernet device comprises a first connector, a second connector, a data signal transmission circuit, a first polarity determination circuit, a second polarity determination circuit and a notification ... | 04/12/2011 |
| 7337081 | Metering device with control functionality and method thereof A metering device of a power substation and method are provided for operating on a secondary analog waveform output by a transformer assembly receiving a primary waveform. The method includes stepping down the secondary waveform and generating a corresponding output... | 02/26/2008 |
| 7315439 | Method and circuit arrangement for limiting an overvoltage In order to limit an overvoltage at a parallel circuit of IGBT (3) and freewheeling diode (7), an undesirable current spike is used to switch on the intrinsically turned-off IGBT (3′) during the presence of the current spike precisely to an ex... | 01/01/2008 |
| 7315272 | Inverter-based flash analog-to-digital converter using floating resistor ladder An analog-to-digital converter device for converting an analog signal into a digital signal includes a comparator array including a plurality of comparators, each of the comparators including a first inverter and a second inverter connected in series with the first ... | 01/01/2008 |
| 7288940 | Galvanically isolated signal conditioning system A galvanically isolated signal conditioning system includes a signal conditioning circuit on an integrated circuit chip; a flying capacitor; and a galvanically isolating MEMS switching device on an integrated circuit chip for selectively switching the flying capacit... | 10/30/2007 |
| 7265535 | Circuit configuration for providing of a diagnostic signal for a power switching device A circuit configuration providing a diagnostic signal for a power switching device which switches a load has a test circuit, a filter device, a validation device, and a coding device. The test circuit tests the power switching device and generates error symptoms for... | 09/04/2007 |
| 7218127 | Method and apparatus for probing an electronic device in which movement of probes and/or the electronic device includes a lateral component An electronic device is moved into a first position such that terminals of the electronic device are adjacent probes for making electrical contact with the terminals. The electronic device is then moved horizontally or diagonally such that the terminals contact the ... | 05/15/2007 |
| 7202868 | System and method for visual recognition of paths and patterns The disclosed embodiments relate to a system and method for providing a graphical representation of data. Embodiments of the present invention comprise: abstracting a plurality of parameters from the parameter set, dividing the plurality of parameters into data grou... | 04/10/2007 |
| 7183871 | Bi-directional access point An improved bi-directional access point includes an impedance boosting section in conjunction with an interface section to a bi-directional communication path. The impedance boosting section incorporates a transformer tap output that couples to an access connection ... | 02/27/2007 |
| 7137061 | Method and device for signaling a transmission fault on a data line A method and a configuration produce a fault signal that is suitable for identifying transmission faults when using differential signaling. A first mid-level signal whose potential is in the area of the mid-point between the signal level on a first signal line and a... | 11/14/2006 |
| 7124041 | Systems, methods, and devices for detecting circuit faults Certain exemplary embodiments can comprise a method for detecting a circuit fault, comprising: for a sensor coupleable to an input circuit, the sensor characterized by an output signal operating voltage range: automatically causing the sensor to be electrically disc... | 10/17/2006 |
| 6930460 | Load driver with power storage unit In a load driving arrangement, electric power is supplied from an auxiliary battery to a main power supply when the power stored by charging in the main power supply is scarce at the startup of the system. The power is supplied to the main power supply by closing re... | 08/16/2005 |
| 6861835 | Method and system for non-invasive power transistor die voltage measurement A non-invasive, non-destructive method and system for determining power transistor peak die voltage utilizes values for each of a plurality of parameters determined by measurement of external terminal voltages for any number of switches, such as transistors of an in... | 03/01/2005 |
| 6636030 | Revenue grade meter with high-speed transient detection A revenue grade power meter capable of detecting and recording high-speed power quality events, and method of operation. The power meter comprises a power metering device for monitoring power metering parameters of power consumed by a user or produced by ... | 10/21/2003 |
| 6388435 | Methods and apparatus for voltage measurement A method is described for measuring a plurality of line voltages using a measurement circuit, the method including the steps of reducing each line voltage over a first impedance; providing a second impedance between each of the reduced voltages and a meas... | 05/14/2002 |
| 6185508 | Power meter for determining parameters of multi-phase power lines A power meter is disclosed for determining power parameters for power lines having periodic 3-phase voltage and current signals distributed to a plurality of power equipment. The 3-phase voltage and current signals have a fundamental frequency. The power ... | 02/06/2001 |
| 6115676 | Methods and apparatus for performing load profile and load control An electronic energy meter register which, in one aspect, is configured to perform load profile recording in a manner which eliminates a need for a back-up battery is described. In other aspects, the present invention is a routine of operating a meter reg... | 09/05/2000 |
| 6112159 | Robust electrical utility meter The present invention includes an electrical utility meter operable to measure power consumption. The method detects and compensates for one or more wiring errors that affects the power consumption measurement of the electrical utility meter. The method i... | 08/29/2000 |
| 6112158 | Service type recognition in electrical utility meter Disclosed is a method and arrangement for use in an electrical utility meter, the electrical utility meter operable to be connected to a plurality of electrical service types. The arrangement is operable to identify a present service type, the present ser... | 08/29/2000 |
| 6104182 | Method of deriving a signal indicating an oscillation in an electric power supply system Current and voltage space vectors of the positive sequence system are formed from phase current and phase voltage sampling values of an electric power supply system, and power quantities of the positive sequence system are derived from them. System freque... | 08/15/2000 |
| 6078870 | Electricity meter with multiplexers for monitoring measurement channels An electricity meter includes measurement channels. In order to permit an extensive self monitoring of the measurement channels, input signals, in particular detected current signals and voltage signals, are detected in a double manner through different s... | 06/20/2000 |
| 6058354 | Electricity meter to measure electrical physical magnitudes which are parameters or functions of measured voltages and/or currents An electricity meter contains analog/digital converters to transform input analog voltages and currents into sampled digital values. A first high speed processor derives auxiliary magnitudes from the sampled digital values without intermediate storage. Th... | 05/02/2000 |
| 5949232 | Method for measuring the energy consumption of individual units in a multiple unit facility operated from a single furnace A method for computing the energy consumed by each unit in a multiple unit facility operating from a single furnace which burns fossil fuel. The method involves connecting an hour meter in a separate electrical circuit including a hot water circulator or ... | 09/07/1999 |
| 5935187 | Engine analyzer with pattern library linked to vehicle ID and display scope configuration An engine analyzer having a dual-trace digital oscilloscope includes a memory for storing a library of digitized waveform patterns, the patterns being stored together with identifying data for each pattern and lists of groups of patterns respectively corr... | 08/10/1999 |
| 5831427 | Voltage measuring device for a source with unknown resistance A volt meter changes the dividing resistance across the terminals of a voltage source between first and second different resistances and measures voltage across the dividing resistor at the different resistances to determine an accurate voltage source mag... | 11/03/1998 |
| 5798932 | Methods and apparatus for removing error due to decaying offsets from measured power system currents A digital decaying current offset correction method and apparatus, in one aspect, separates the requirements of detecting fault existence from the requirements of detecting fault location. Once the decaying offset removal routine is initiated, current and... | 08/25/1998 |
| 5737730 | Measuring process for measuring chargeable electrical consumption from an electrical network and electronic electricity meter A process for measuring electricity consumption, especially suitable for small consumers, comprises the steps of continuously measuring consumer current, integrating the current with time to obtain a value (A.h) relating to consumption; adjusting the inte... | 04/07/1998 |
| 5726901 | System for reporting computer energy consumption A circuit for determining and reporting the energy consumed by an electronic device having a microprocessor and power supply lines for supplying power to the device is disclosed. The circuit comprises a voltage divider connected for sensing the voltage ac... | 03/10/1998 |
| 5663933 | Meter circuit The present invention relates to an electronic meter circuit for a time comparison measurement between two successive periodic events with which the signal time ratios between two times two successive events can be recognized by a simple method. The elect... | 09/02/1997 |
| 5657237 | Instrument and method for the digital electronic measurement of periodic electrical quantities The method involves use of an instrument with at least one operational amplifier to sense the analog value first of a voltage, and then of the relative current, introducing a known delay and applying a reference voltage at the amplifier input to render al... | 08/12/1997 |
| 5644238 | Method and apparatus for comparing load current in an electrical circuit with the capacity of its supply source A method and apparatus for measuring and recording peak RMS electrical current over multiple moving-average time periods provides current-flow information in the same units used to characterize electrical system distribution components--primarily overcurr... | 07/01/1997 |
| 5446655 | Multiple-meter driving apparatus A multiple-meter driving system intends to cut down on the amount of space needed and to reduce the manufacturing cost by providing a single controller including a processing circuit, the controller being adapted collectively to drive a plurality of meter... | 08/29/1995 |
| 5410244 | Air core gauge testing method and apparatus utilizing magnetic coupling between gauge coils A method for testing gauges includes applying a rotation signal to the gauge. An AC input signal is superimposed on a first coil of the gauge. A second coil of the gauge is monitored to detect a coupled AC output signal. The rotational signal is varied wh... | 04/25/1995 |
| 5336991 | Apparatus and method for measuring electrical energy and quadergy and for performing line frequency compensation An apparatus and method for measuring electrical energy and quadergy and for performing line frequency compensation includes a compensation integrated circuit for adjusting the determined reactive load quadergy, based on variations between the actual line... | 08/09/1994 |
| 5296804 | Air core gauge fixed voltage signal and variable pulse width modulation signal interchanged control system therefor A pulse-width modulation system provides means for controlling dual-coil, air-core gauges over 360 degrees. The system moves a dial needle from one octant of the gauge to the next in response to coded data representing measurands by holding one coil at 10... | 03/22/1994 |
| 5256979 | Method and apparatus for measuring an unknown voltage, and power meter employing the same A method for measuring an unknown voltage (VIN) using a voltage divider network in such a way that uncertainties in the values of the resistances do not affect the measurement. The unknown voltage is divided into three fractional voltages, the ... | 10/26/1993 |
| 5252864 | Normalization circuit for a measuring device A measuring device comprises at least two transducer units for sensing input quantities (Ai) and for producing signals which are proportional to the logarithm of the input quantities. The measuring device also includes a normalization circuit w... | 10/12/1993 |
| 5121347 | Apparatus for manipulating triangular wave signals used to drive a gauge having a pair of coils arranged in quadrature An apparatus for driving a gauge having coils in quadrature to generate a resultant magnetic field in accordance with currents applied thereto and having a pointer angularly swept by the field, the apparatus having a memory to store a first data defining ... | 06/09/1992 |
