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| Number | Title | Issue Date |
| 8143882 | Current measuring apparatus A current measuring apparatus is disclosed. The current measuring apparatus comprises a power supply unit, an impedance setting module, and a current measuring unit. The power supply unit is adapted to provide an electric power to an electronic apparatus. The impeda... | 03/27/2012 |
| 8120350 | Clamp meter with safe trigger mechanism This invention provides a clamp meter with safe trigger mechanism which allows an operator to take electrical measurements of the conductors safely, particularly in case of the electrical conductor elements situated in congested or awkward locations and positions. I... | 02/21/2012 |
| 8111060 | Precision AC current measurement shunts A more precise and cost effective means than previously commercially available for measuring alternating currents up to 100 amperes in the frequency range from direct current to 100 kilohertz can be measured with precision approaching 0.001% employs a shield around ... | 02/07/2012 |
| 7944199 | Voltage-measuring circuit and method An embodiment of a voltage-measuring circuit includes: a first resistor connected to a first measurement node; a second resistor connected to the first resistor and a second measurement node; a configuration switch configured to, in response to a control signal, sel... | 05/17/2011 |
| 7936165 | Current sensor A current sensor includes a housing having a pair of first slits, a bus bar supported by the housing and electrically connected to a battery post provided on a battery, an annular shield member arranged so as to surround an axis extending in a direction in which a c... | 05/03/2011 |
| 7932714 | Method to communicate with multivalved sensor on loop power A method and apparatus for detecting at least two process variables in a loop powered circuit. The method includes the steps of (a) powering the loop, detecting a first process variable value during a first time interval, (b) detecting a second process variable valu... | 04/26/2011 |
| 7923987 | Magnetic sensor integrated circuit with test conductor A magnetic sensor integrated circuit includes a plurality of magnetically sensitive elements, and at least one test conductor positioned adjacent to at least one of the magnetically sensitive elements and configured to generate a differential magnetic field that is ... | 04/12/2011 |
| 7893685 | RF meter with input noise suppression The invention provides a handheld RF meter with an improved isolation from EMI. The meter incorporates an interference barrier comprising a connecting cable and one or more ferrite cores possibly having different impedance characteristics. ... | 02/22/2011 |
| 7843189 | Current sensor having coil mounted to current carrying bus and related system A current sensor includes a coil for sensing current in a current carrying bus, and a mount for mounting the coil to the current carrying bus at a distance from the bus. A system including the current sensor includes similar structure. ... | 11/30/2010 |
| 7843188 | Remote sensor network powered inductively from data lines A computer implemented method and apparatus for a sensor network. The sensor network comprises a set of cables, a set of sensor units, and a central processor unit. The set of cables is capable of conducting an electrical current. The set of sensor units is coupled ... | 11/30/2010 |
| 7750621 | Clamp meter for measuring consumption of current and power of electrical product A clamp meter is provided for measuring consumption of current and power of an electrical appliance. The clamp meter includes a power inlet port and a power outlet port that are in controlled connection with each other. A current detection element is arranged betwee... | 07/06/2010 |
| 7741832 | Micro-electromechanical system (MEMS) based current and magnetic field sensor using tunneling current sensing A micro-electro-mechanical system (MEMS) current sensor for sensing a magnetic field produced by an electrical current flowing in a conductor includes a first fixed element and a moving element. The moving element is spaced away from the first fixed element and is m... | 06/22/2010 |
| 7733080 | Revolvable clamp meter The clamp meter contains a revolving member configured between the meter's body member and jaw member. The revolving member is composed of a first base and a second base located on the interfacing sides of the body member and the jaw member, respectively. The first ... | 06/08/2010 |
| 7728578 | Method and apparatus for high current measurement In order to extend the measurement range of a current sensor, a current divider is formed by a first conductor formed in a current sensor that is mounted on a printed circuit board and a second conductor on the printed circuit board that electrically shorts at least... | 06/01/2010 |
| 7719259 | Temperature stable current sensor system A current sensor system that uses a sensor resistor to sense current flow and in which the level of voltage drop across that resistor is used to control the current flow through another resistor, the input resistor, into a current integrator. The ratio of input resi... | 05/18/2010 |
| 7714567 | Power cable magnetic field sensor A method and apparatus to detect non-cancelled magnetic field produced when current flows through an electric conductor are provided. The sensor includes multiple coils, which allow the sensor to be arbitrarily oriented and attach to the outside of an electrical pow... | 05/11/2010 |
| 7649348 | Auxiliary element for fixing a current sensor to an electrical conductor An auxiliary element includes an end plate having an inner face which is intended to be applied against a large surface of a sensor and an outer face which bears two spaced-apart mounting lugs on a first edge thereof, the lugs extending outwards perpendicularly to t... | 01/19/2010 |
| 7622909 | Magnetic field sensor and electrical current sensor therewith A magnetic field sensor comprises a magnetic field sensing cell and a magnetic shield comprising at least two parts separated by an air-gap and surrounding the magnetic field sensing cell positioned in a cavity of the magnetic shield. ... | 11/24/2009 |
| 7615987 | Device for determining electrical variables A device for determining electrical variables, having a housing and an electrical main conductor, which is provided for conducting a load current, and which has a measuring section, having an electrical evaluation unit which is connected to the electrical main condu... | 11/10/2009 |
| 7602169 | Input cancellation circuit A system and method are provided for isolating an input without adding significant distortion and without significantly adversely affecting the bandwidth of input circuits. In one embodiment, a single ended signal is substantially cancelled by an arrangement includi... | 10/13/2009 |
| 7550962 | Wide bandwidth attenuator input circuit for a measurement probe A wide bandwidth attenuator input circuit for a measurement probe has a Z0 attenuator circuit coupled in series with a compensated RC attenuator circuit. The series attenuator elements of the Z0 and the compensated RC attenuator circuits are co... | 06/23/2009 |
| 7545137 | Current detecting circuit A current detecting circuit includes a current detecting module includes a detecting resistor, a voltage transmitting module, and a current adjusting module including four field effect transistors, a transistor, and a operational amplifier. The first drain is connec... | 06/09/2009 |
| 7521917 | Method and apparatus for testing material integrity In accordance with one embodiment, the present technique provides a testing apparatus for testing material integrity in an object. The testing apparatus includes an electrical conductor and a sensing device. In the exemplary testing device, the electrical conductor ... | 04/21/2009 |
| 7508189 | Micro-electromechanical system (MEMS) based current and magnetic field sensor having improved sensitivities A micro-electromechanical system current and magnetic field sensor is presented. The micro-electromechanical system current and magnetic field sensor is configured to sense a magnetic field produced by a current carrying conductor. The sensor includes a structural c... | 03/24/2009 |
| 7495430 | MEMS based current sensor using magnetic-to-mechanical conversion and reference components A micro-electromechanical system (MEMS) current sensor is described as including a first conductor, a magnetic field shaping component for shaping a magnetic field produced by a current in the first conductor, and a MEMS-based magnetic field sensing component includ... | 02/24/2009 |
| 7466121 | MEMS based current sensor using magnetic-to-mechanical conversion and reference components A micro-electromechanical system (MEMS) current sensor is described as including a first conductor, a magnetic field shaping component for shaping a magnetic field produced by a current in the first conductor, and a MEMS-based magnetic field sensing component includ... | 12/16/2008 |
| 7449877 | Current measurement apparatus Apparatus and methods are provided for a system for measurement of a current in a conductor such that the conductor current may be momentarily directed to a current measurement element in order to maintain proper current without significantly increasing an amount of... | 11/11/2008 |
| 7402991 | Wide bandwidth attenuator input circuit for a measurement probe A wide bandwidth attenuator input circuit for a measurement probe has a Z0 attenuator circuit coupled in series with a compensated RC attenuator circuit. The series attenuator elements of the Z0 and the compensated RC attenuator circuits are co... | 07/22/2008 |
| 7397234 | Current sensor with reset circuit A current sensor includes an integrator for providing an output signal, responsive to a detected current, and a reset circuit. The reset circuit, responsive to a control signal, resets the integrator for a time period shorter than an assertion time of the supplied c... | 07/08/2008 |
| 7388372 | Electrical system with magnetoresistive sensors An electrical system includes a first monolithic circuit. The first monolithic circuit may include a first magnetoresistive sensor operable to sense magnetic flux and produce an output signal relating to the sensed magnetic flux. The first magnetoresistive sensor ma... | 06/17/2008 |
| 7385402 | Light source current sensing circuit and driving circuit in a display device A current sensing circuit for sensing a current flowing through a LED bank and a driver circuit for driving the LED bank are provided. The current sensing circuit includes: a matched transistor group, having a first current path coupled to the load device for sensin... | 06/10/2008 |
| 7378837 | Method and system for calibrating a micro-electromechanical system (MEMS) based sensor using tunneling current sensing A system and method for controlling a tunneling current between a first element and a second element of a micro-electro-mechanical system (MEMS) sensor. The system includes a tunneling current excitation source for providing a tunneling current between the elements ... | 05/27/2008 |
| 7372246 | Phase identification system and method A system and method for determining the relative phase between current-carrying conductors. A reference unit samples and digitizes a voltage waveform at a reference location and transmits the digitized voltage waveform. A field sampling unit is placed on or directly... | 05/13/2008 |
| 7366773 | Alternative communications paths for data sent over power line carrier Extensions to the concept of using a power line carrier to convey a data record from the secondary side of a first transformer to a receiver in a power distribution substation include receiving the data record over a secondary data path in the event that the primary... | 04/29/2008 |
| 7365559 | Current sensing for power MOSFETs A power MOSFET, comprising main and current mirror MOSFETs, has a current sense resistance coupled between its mirror and source terminals and a monitoring circuit responsive to a first voltage dependent upon current through the current sense resistance. The circuit... | 04/29/2008 |
| 7358717 | Input by-pass circuit for a current probe An input by-pass circuit for a current probe has first and second switches coupled between current probe inputs and current sensing circuit inputs. A switch control is coupled to the switching circuit for selectively coupling and decoupling the current probe inputs ... | 04/15/2008 |
| 7355381 | Current sensor with reduced sensitivity to parasitic magnetic fields A current sensor includes: several magnetic-field-sensitive components which are disposed on a support such as to be distributed around a conductor through which a current to be measured flows, and a processing circuit which receives an output signal from the compon... | 04/08/2008 |
| 7352708 | Method and apparatus for border node behavior on a full-duplex bus A method and apparatus relating to the behavior of border nodes within a high performance serial bus system is disclosed. A method for determining and communicating the existence of a hybrid bus is disclosed. A method for determining a path to a senior border... | 04/01/2008 |
| 7353322 | System and method for providing dynamic configuration ROM using double image buffers A dynamic configuration ROM which may be updated while linked to the serial bus and with little or no risk of publishing inconsistent configuration ROM information to the other nodes on the bus. The dynamic configuration ROM comprises first and second configuration ... | 04/01/2008 |
| 7353284 | Synchronized transmission of audio and video data from a computer to a client via an interface A method for controlling data transmission between a computer and a video client via an interface, the method comprising: the computer polling the interface a first time to determine the size of the buffer on the interface; receiving a first buffer size value from t... | 04/01/2008 |
