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| Number | Title | Issue Date |
| 8054094 | Image reconstruction based constrained maximization A method of providing an image of an interior of a structure containing regions having different conductivities or admittivities. In one embodiment a series of electrical signal sets is applied to a series of electrodes, each signal set generating a rotating electri... | 11/08/2011 |
| 8054093 | Sensor threshold circuit There is provided a sensor threshold circuit that makes available a hysteresis width that is not dependent on the change in a threshold point. Since a bias current IB is generated by a threshold current IT and a threshold adjusting current I | 11/08/2011 |
| 7948247 | Metal identifying device and metal identifying method A metal identifying device precisely identifies a metal material in a metal member having a plurality of through-hole portions penetrating through the metal member. The metal identifying device of the present invention includes a measurement unit that obtains a meas... | 05/24/2011 |
| 7880485 | High-sensitive resistance measuring device and monitoring method of solder bump According to an aspect of an embodiment, a high-sensitive resistance measuring device of solder bumps comprises a resistance variation detection unit which detects a differential voltage (ΔV=V1−V2), which is obtained by subtracting a second voltage ... | 02/01/2011 |
| 7764071 | Testing and display of electrical system impedance An automated method is provided for testing an electrical circuit using a system tester. Load leads and sense leads of the tester are connectable to any two points of an electrical circuit, such as in a vehicle system, for displaying in real time the impedance betwe... | 07/27/2010 |
| 7609075 | Differential level shifter with automatic error compensation For measuring a voltage difference between two measurement potentials at the input of a voltage converter that can be controlled via a control input, the measurement potentials are shifted by a voltage potential defined by a first pair of impression currents to obta... | 10/27/2009 |
| 7550980 | System and method for characterizing a load at the end of a cable Apparatus within power sourcing equipment and a method for determining whether a load within a powered device coupled to the power sourcing equipment via a cable is within an acceptable resistance range. If the load is within the acceptable resistance range, a volta... | 06/23/2009 |
| 7532017 | Detection of presence or absence of AC maintain power signature in power-over-ethernet system An AC maintain power signature detection circuit in a power sourcing equipment (PSE) for a Power over Ethernet system injects an AC test signal onto a power port of the PSE. The AC test signal is driven onto a first power terminal of the power port through a sense r... | 05/12/2009 |
| 7414414 | Spatially distributed guarded impedance A guarded sense impedance for use in a measurement instrument includes a sense impedance adapted to have a spatially distributed electrical potential and at least one guard structure adapted to have the spatially distributed electrical potential. The guard structure... | 08/19/2008 |
| 7411406 | Power supply with current measurement circuit for transformer with high frequency output A current measurement circuit to measure the output of a power supply transformer includes a simulation capacitor having a capacitance proportional to a parasitic capacitance of the transformer. The first electrode of the capacitor is coupled to an output winding of... | 08/12/2008 |
| 7411407 | Testing target resistances in circuit assemblies A test system includes a circuit assembly having an IC and an external circuit. The IC includes test circuitry used to observe data indicative of target resistances in the external circuit. The test system evaluates the data to determine target resistance values. A ... | 08/12/2008 |
| 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 |
| 7329389 | Sensor device and method for qualitative and quantitative analysis of gas phase substances New sensors and methods for qualitative and quantitative analysis of multiple gaseous substances simultaneously with both high selectivity and high sensitivity are provided. The new sensors rely on a characteristic difference in energy between the interaction of a p... | 02/12/2008 |
| 7321846 | Two-wire process control loop diagnostics A diagnostic device for coupling to a process control loop includes digital communication circuitry configured to receive a digital communication signal from the process control loop. The digital communication signal is a digitally modulated analog signal on the pro... | 01/22/2008 |
| 7290450 | Process diagnostics A diagnostic device for use in a industrial process includes monitoring electronics or diagnostic circuitry configured to diagnose or identify a condition or other occurrence in the industrial process. The system can be implemented in a process device such as a flow... | 11/06/2007 |
| 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 |
| 7279909 | Signal coincidence detection circuit Signal coincidence detection circuits and methods implemented in such circuits are disclosed. An example signal coincidence detection circuit includes a first differential transistor pair, a second differential transistor pair coupled with the first differential tra... | 10/09/2007 |
| 7271599 | Semiconductor device An infrared radiation image pickup apparatus, the image pickup elements of which are each formed by a bolometer, is disclosed. The resistance value of the bolometer outside a preset range in a given readout circuit associated with a given image pickup element does n... | 09/18/2007 |
| 7259572 | Method and apparatus for detecting impedance A method and apparatus for detecting an impedance across a pair of terminals. A sensing circuit is AC coupled to the terminals which produces an output related to a time constant associated with the impedance. ... | 08/21/2007 |
| 7254518 | Pressure transmitter with diagnostics In one embodiment, a pressure transmitter is provided which diagnoses the condition of a primary element and/or an impulse line which connects to a pressure sensor. A difference circuit coupled to the pressure sensor has a difference output which represents the sens... | 08/07/2007 |
| 7248061 | Transmission device for transmitting a signal through a transmission line between circuits blocks having different power supply systems A transmission device includes a transmission line composed of first and second transmission lines. A first circuit block outputs a non-inverted transmission signal to the first transmission line, and a second output circuit outputs an inverted transmission signal t... | 07/24/2007 |
| 7235985 | Method and device for signal amplitude detection A method and a device (1) for detecting signal amplitudes by removing any DC component from the signal and then shifting the signal by a shift amount so as to produce a shifted signal having a first signal level equal to a reference level (Vref). The shift am... | 06/26/2007 |
| 7197268 | Current measurement circuit for transformer with high frequency output A printer apparatus includes a photoreceptor, a magnetic roll, an electrode, a current source coupled to the electrode, the current source having a signal generator coupled to an input winding of a transformer that exhibits a parasitic capacitance; and a current mea... | 03/27/2007 |
| 7123032 | Voltage sensor and dielectric material A voltage sensor is described that consists of an arrangement of impedance elements. The sensor is optimized to provide an output ratio that is substantially immune to changes in voltage, temperature variations or aging. Also disclosed is a material with a large and... | 10/17/2006 |
| 7119556 | Probe for surface-resistivity measurement and method for measuring surface resistivity A probe for surface-resistivity measurement is provided in a surface-resistivity measuring apparatus for measuring a surface resistivity of a target. The probe includes an electrode and a contact portion. The contact portion has a specific resistance larger than the... | 10/10/2006 |
| 7085610 | Root cause diagnostics An industrial process diagnostic apparatus is provided which can identify a source, or “root cause”, of an aberration in an industrial process. A plurality of process configuration models are provided which each represent a physical (or actual) implementation of... | 08/01/2006 |
| 7061210 | Controllable current trip-point detection circuit A current trip point detection circuit includes a transistor, a series of resistors, an amplifier, a comparator, and a series of switching circuits. The first transistor and the resistors are configured as an inverting gain stage. The amplifier cooperates with the f... | 06/13/2006 |
| 7046180 | Analog-to-digital converter with range error detection A circuit includes a multiplexer, an analog-to-digital converter, and a processor that compares a sequence of digital outputs from the analog-to-digital converter to a sequence of normal ranges that correspond with the digital outputs in order to provide an error ou... | 05/16/2006 |
| 7018800 | Process device with quiescent current diagnostics A process device for use on an industrial process control system includes a quiescent current sensor configured to sense quiescent current draw of the process device. Diagnostic circuitry determines a diagnostic condition of the process device as a function of the s... | 03/28/2006 |
| 7019493 | Method and apparatus for protection of batteries The protection circuit (30) comprises at least one switch (FET1, FET2) comprising at least one control means (G1, G2) for adjusting the conductivity of said at least one switch (FET1, FET2). The conductivity is arrang... | 03/28/2006 |
| 7010459 | Process device diagnostics using process variable sensor signal A diagnostic device for use in a process control system receives a sensor signal related to a process variable of a process sensed by a process variable sensor. A signal preprocessor provides a sensor power signal output as a function of a frequency distribution of ... | 03/07/2006 |
| 6999063 | Method and apparatus for accurately reading a potentiometer A method for reading a position of a wiper on a potentiometer, comprising the steps of (A) charging a capacitor connected to a wiper terminal of the potentiometer, (B) discharging the capacitor through a particular terminal of the potentiometer, (C) measuring a firs... | 02/14/2006 |
| 6992463 | Battery protection circuit A protection of battery system having battery cells Cell1˜Cell3, FET switches SW1, SW2 that are connected to the high-side path and control on/off state of the path, as well as fuse F1 for cutting said path, primary protection cir... | 01/31/2006 |
| 6970003 | Electronics board life prediction of microprocessor-based transmitters A field device includes circuitry to successively measure a parameter related to current drawn by electronics of the field device. The measurements are provided to a prediction engine which calculates a diagnostic output based upon the plurality of current-related m... | 11/29/2005 |
| 6946848 | Calibration configuration A calibration configuration for setting an adjustable impedance has a voltage divider with a variable resistor and a resistor connected in series, which circuit is supplied with potentials of a supply voltage and has, between the resistors, a partial voltage tap off... | 09/20/2005 |
| 6944483 | Portable radio terminal with infrared communication function and communication method for portable radio terminal A portable radio terminal with an infrared communication function prevents consumption power from increasing when a radio communication function and an infrared communication function are used at a same time. A radio communication function section is judged whether ... | 09/13/2005 |
| 6920799 | Magnetic flow meter with reference electrode An magnetic flow meter is provided which includes a reference electrode configured to electrically couple process fluid flowing within a flowtube of the flow meter. The reference electrode is adapted to measure potential of the process fluid. A current limiter is co... | 07/26/2005 |
| 6917503 | Programmable current limiting using a shunt resistor An overcurrent protection circuit using a shunt resistor and the voltage drop across a switch to program a user-defined current limiting level. This protects the switch and the input power supply, as well as the load. The shunt resistor is connected to the input or ... | 07/12/2005 |
| 6907383 | Flow diagnostic system A flow diagnostic system for a flow sensing element and impulse lines. A pressure transmitter coupled to the impulse lines provides digital pressure data to a control system. The control system provides the pressure data and real time clock readings to a diagnostic ... | 06/14/2005 |
| 6867604 | Apparatus for accurately measuring battery voltage A circuit for measuring voltage of a battery or group of batteries whose terminals are not directly accessible. The battery or group of batteries can have three leads. First and second leads are connected to the voltage output of the battery and the third lead is co... | 03/15/2005 |
