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| Number | Title | Issue Date |
| 8169212 | Calibrating signals by time adjustment A signal processing device having an adjustment unit for adjusting a time duration of each of a plurality of signals individually in accordance with an amplitude of the respective signal to thereby generate calibrated signals, and a combining unit for combining the ... | 05/01/2012 |
| 7990134 | Correcting circuit, correcting method, and sensor apparatus A correcting circuit includes a correction current synthesizer synthesizing a correction current based on an output signal of a sensor, a current adjuster adjusting a determining current which corresponds to a correction amount based on the correction current, and a... | 08/02/2011 |
| 7911199 | Method for eliminating the need to zero and calibrate a power meter before use An improved power sensor having an input connector connected to an input port having a center pin and a ground side; an amplifier; first and second detectors; and a thermal stabilization system, including a thermal mass disposed between the ground side of the input ... | 03/22/2011 |
| 7830134 | Power meter with means to eliminate the need to zero and calibrating An improved power sensor having an input connector connected to an input port having a center pin and a ground side; an amplifier; first and second detectors; and a thermal stabilization system, including a thermal mass disposed between the ground side of the input ... | 11/09/2010 |
| 7309980 | Current sensing circuit for use in a current measurement probe A current sensing circuit has a transformer where a current to be measured induces a magnetic flux into a magnetic core. The magnetic core has a magneto-electric converter for sensing DC to low frequency current signals and a secondary winding for sensing higher fre... | 12/18/2007 |
| 7271595 | Sensor detection apparatus and sensor Provided are two monitor circuits for monitoring two input signals of an input stage differential amplifier, respectively, and two monitor circuit for monitoring two output signals of the input stage differential amplifier, respectively. When failure occurs at the b... | 09/18/2007 |
| 7256574 | Device for measuring electric current intensity A magnetic field generated by a primary winding (1) in which the current (i1) to be measured flows is balanced by a magnetic field of opposing direction generated by a secondary winding (2) in which a compensating current (i2) flo... | 08/14/2007 |
| 7248058 | Testing and calibration device with diagnostics A testing device for determines values of various electrical variables associated with a device within a process system. The testing device provides bi-directional electrical communication with a device to be monitored and automatically provides a connection configu... | 07/24/2007 |
| 7246336 | Ramptime propagation on designs with cycles A method for calculating ramptime propagation for integrated circuit layout patterns having pins interconnected in an oriented graph in one or more closed loops is described. Ramptime values are calculated for a first set of the pins, which are not connected to a cl... | 07/17/2007 |
| 7233464 | Apparatus for and method of ground fault detection A ground fault detection system is provided where one current sensor is used to calibrate a second sensor in order to provide automatic zeroing of the difference measurement. The calibration is done gradually in order to differentiate between sensor drift and a tran... | 06/19/2007 |
| 7227347 | Device and method for measuring a current A device and method for current measurement in a conductor and, in particular, a method to feed the devices of the invention in order to interpret the information provided. The method is based on the exploitation of discrete sampling of the information provided from... | 06/05/2007 |
| 7224158 | Circuit arrangement and a method for compensating changes of a transfer factor of a magnetic field sensor arrangement The invention relates to a circuit configuration for compensating for the changes in a transfer ratio of a magnetic field sensor arrangement. According to one embodiment of the invention, a control loop for effecting this compensation is provided in the form of an i... | 05/29/2007 |
| 7205930 | Instantaneous 3—D target location resolution utilizing only bistatic range measurement in a multistatic system A multistatic radar has a radar transmitter for illuminating a target with a radar signal. The target reflects the radar signal to three separate radar receivers, each performing a bistatic range measurement to the target. The three bistatic range measurements are c... | 04/17/2007 |
| 7193409 | Measuring transformer utilizing a reference current A measuring transformer compares a current flowing through a conductor to a reference current. In one embodiment, the measuring transformer includes a magnetic circuit formed by a toroidal core, a conductor through which the current to be measured flows and which is... | 03/20/2007 |
| 7188036 | Internal bias measure with onboard ADC for electronic devices An apparatus and method for on-chip bias measurement of an analog signals on an integrated circuit with a switchable analog-to-digital converter capable of performing testing and other types of processing. Analog signal test locations are selected for testing by a t... | 03/06/2007 |
| 7180314 | Self-calibrating electrical test probe calibratable while connected to an electrical component under test A self-calibrating test probe system that does not require probing head removal and replacement for calibration or may self-calibration is described. Using this system, the test probe and/or the entire system (including a testing instrument) may be calibrated or may... | 02/20/2007 |
| 7164355 | Process transmitter with a plurality of operating modes A transmitter for measuring a process variable of an industrial process includes a sensor adapted to measure the process variable and to generate a sensor output. A mode selector is adapted to select between operational modes. At least one operational mode is relate... | 01/16/2007 |
| 7164263 | Current sensor A current sensor is described that uses a plurality of magnetic field sensors positioned around a current carrying conductor. The sensor can be hinged to allow clamping to a conductor. The current sensor provides high measurement accuracy for both DC and AC currents... | 01/16/2007 |
| 7057384 | Measuring transformer utilizing a reference current A measuring transformer compares a current flowing through a conductor to a reference current. In one embodiment, the measuring transformer includes a magnetic circuit formed by a toroidal core, a conductor through which the current to be measured flows and which is... | 06/06/2006 |
| 7026827 | Portable calibration unit for test equipment A portable calibration unit for calibrating test equipment is disclosed that may incorporate a communication interface for connecting to a computer embedded within the test equipment, a variable signal source for producing a test signal, a processor in communication... | 04/11/2006 |
| 6998800 | Current sensor for DC powered three phase motor control system A system is provided for sensing a motor current from a three phase inverter. A first resistor is coupled between a first transistor of the inverter and a supply voltage, and a second resistor is coupled between a second transistor of the inverter and ground. Circui... | 02/14/2006 |
| 6977825 | Voltage regulator using a transimpedance block to measure output A method of controlling the output voltage of a voltage regulator that uses a transimpedance block is disclosed. The method comprises measuring the voltage representative current of the output and comparing the voltage representative current to a reference current. ... | 12/20/2005 |
| 6919728 | Calibration cache and database A method and apparatus for calibrating an oscilloscope and storing the calibration results for further use. Accordingly, an oscilloscope is provided with a calibration cache database for storing various calibration curves and their associated states. Each time the o... | 07/19/2005 |
| 6892144 | Arrangement for providing sensor calibration information in a modular utility meter A modular electronic utility meter has a sensor portion that includes sensor devices and a memory device storing calibration and/or error information specific to the sensor devices. Such a sensor portion is designed for use with a corresponding measurement portion t... | 05/10/2005 |
| 6889334 | Multimode system for calibrating a data strobe delay for a memory read operation A system for coordinating the timing of a data strobe with data supplied by a memory module to the memory controller read data FIFO of a processor-based system, providing multiple calibration modes. A calibration PDL (programmable delay line) is used to reiterativel... | 05/03/2005 |
| 6836126 | Offset calibration system and method of automatic power control loop An offset calibration system of a control loop at least comprises a pre-amplifier circuit and a post-amplifier circuit. The pre-amplifier circuit generates a pre-output signal and then transmits the pre-output signal to the post-amplifier circuit to amplify. The off... | 12/28/2004 |
| 6791315 | Current detector and current measuring apparatus including such detector with temperature compensation A current sensing device and a residual current detection device are described having a temperature compensation capability so that residual current can be directly measured to a high degree of precision in the background of a high load current. The residual current... | 09/14/2004 |
| 6651020 | Method and apparatus for economical drift compensation in high resolution measurements A system for measuring differences in a physical variable, such as temperature or voltage, by utilizing predictable behavior in the relative time drift of offset curves for various circuit elements, including, for example, two sensors coupled to a differe... | 11/18/2003 |
| 6570373 | Current sensor programmable through connector An apparatus for sensing electrical current flowing in a conductor includes a toroidal core formed of a ferric material and having a slot defining an air gap, a Hall Effect sensor integrated circuit positioned in the air gap for sensing electrical current... | 05/27/2003 |
| 6522123 | Apparatus for measuring current flowing in a conductor An apparatus for measuring current carried by a conductor has a differential voltage amplifier having inputs for connection to the conductor at two spaced-apart points thereof, constituting the ends of a segment. A circuit which converts an output voltage... | 02/18/2003 |
| 6486648 | Electronic circuit including an analog output through which an adjustment means is programmed A circuit for evaluating electrical signals having a programmable adjustment is described. The circuit includes an analog output for signals that have been evaluated which can be used to program the adjustment.... | 11/26/2002 |
| 6476592 | Device and a method of metering and displaying energy consumption and a method of calibrating the device A device and a method of metering and displaying immediate and/or accumulated energy consumption at a place of consumption, such as electricity, water or heating consumption in a household, said device comprising a recording unit which records and sums an... | 11/05/2002 |
| 6400131 | Transducer offset compensation A transducer circuit, particularly for monitoring current, compensates for offset in the transducer output by sampling the output periodically at a moment at which the output is known, and storing the sampled value as an offset. The offset is compared wit... | 06/04/2002 |
| 6194911 | Integrated circuit tester with compensation for leakage current In an integrated circuit tester module, pin electronics circuitry supplies leakage current to a circuit node which is connected to a signal pin of a device under test. The leakage current is compensated by connecting the circuit node to a voltage source a... | 02/27/2001 |
| 6163759 | Method for calibrating variable delay circuit and a variable delay circuit using the same In a variable delay circuit calibrating method in which the state of connection of M delay stages connected in cascade through multiplexers and weighted differently is controlled by a control signal value to generate a calibrated amount of delay correspon... | 12/19/2000 |
| 6084394 | Electronic measuring device using a correction factor to compensate for measuring errors An electronic measuring device achieves an improvement in measurement accuracy while at the same time compensating for influences on the measurements, by providing for a correction factor to be stored in a correction element when the measuring device is f... | 07/04/2000 |
| 6028426 | Temperature compensated current measurement device An apparatus and method for measuring electric current. The apparatus includes a conductive shunt for developing a voltage drop in response to current flow through the shunt, a temperature sensor for sensing the temperature of the shunt, and an amplifier ... | 02/22/2000 |
| 5999108 | Avionics display pointer sensor A display apparatus (10) having a display (12) including indicia representative of a measured parameter, an indicator (13) shiftable relative to the display, and a control assembly (14) for controlling the positioning of the indicator relative to the disp... | 12/07/1999 |
| 5923161 | Graphical display device A measuring device displays waveforms representative of electrical signals and includes a selector, at least one input terminal, and a graphical display. The graphical display is suitable to view a waveform thereon. The measuring device receives an electr... | 07/13/1999 |
| 5920189 | Auto ranging current monitor with common mode correction An improved current monitor for measuring current over a wide dynamic range. The current monitor includes a low current channel, a high current channel, and a switch for selecting the low current channel if the measured current is below a predetermined le... | 07/06/1999 |
