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| Number | Title | Issue Date |
| 7855561 | Test circuit A test circuit according to the present invention includes: a synthesis circuit that synthesizes a first test result signal output from a first test target circuit in response to a test instruction, and a second test result signal output from a second test target ci... | 12/21/2010 |
| 7554334 | Matching network characterization using variable impedance analysis Embodiments of a method of calculating the equivalent series resistance of a matching network using variable impedance analysis and matching networks analyzed using the same are provided herein. In one embodiment, a method of calculating the equivalent series resist... | 06/30/2009 |
| 7538560 | System and method for component failure protection A system and method is presented for component failure protection. In one embodiment, the system includes an operational circuit configured to operate in a first operational state, wherein the first operational state is in proximity of a circuit failure threshold. A... | 05/26/2009 |
| 7424417 | System and method for clock domain grouping using data path relationships A method and system are disclosed, in a simulation of a design of a digital integrated circuit chip, to limit a number of scan test clocks and chip ports used for testing the chip. Clock domains are identified within the design of the chip that are independent of ea... | 09/09/2008 |
| 7400150 | Remote fault monitoring in power lines Systems and methods for remotely monitoring and detecting faults in power distribution systems. In one embodiment, a remote fault monitoring system comprises a plurality of remote fault detection devices distributed on a power distribution network, and a monitoring ... | 07/15/2008 |
| 7355412 | Remote fault monitoring system Remote indication devices are each a combination of electrical parameter measurement circuitry, a CPU, and a communication device. Each remote indication device is electrically or electromagnetically coupled to a power distribution circuit conductor to monitor the c... | 04/08/2008 |
| 7292044 | Integrating time measurement circuit for a channel of a test card In a first embodiment of the invention there is provided an electronic chip for use with an automatic testing equipment device testing a device under test. The device under test has a plurality of pins and the electronic chip is placed in a channel of a test card th... | 11/06/2007 |
| 7285960 | Measuring device, and method for locating a partial discharge A device and a method for locating partial discharges in a conductor rod of a dynamo-electric machine are provided, the conductor rod being provided with an exterior electrical insulation. A first and a second sensor are embodied so as to detect a signal which is ge... | 10/23/2007 |
| 7211994 | Lightning and electro-magnetic pulse location and detection for the discovery of land line location The identification of the path and termination points of copper landlines is performed through the use of natural events without the aid of network provisioning information. At least one sferics detector detects at least one sferics event. A listening device, which ... | 05/01/2007 |
| 7212008 | Surveillance device detection utilizing non linear junction detection and reflectometry An apparatus for detecting concealed surveillance devices coupled to a transmission line uses either a time domain or frequency domain reflectometry operation to locate any impedance anomalies on the transmission line and a non-linear junction detection operation to... | 05/01/2007 |
| 7161873 | Method of detecting and locating a source of partial discharge in an electrical apparatus A method of detecting and localizing a source of partial discharge in an electrical apparatus placed in an enclosure containing an acoustically-conductive fluid. The method consists in: positioning (31) acoustic detectors an... | 01/09/2007 |
| 7157710 | Corona discharge detection An apparatus and process are provided for detecting whether a corona discharge has occurred external or internal to equipment in which a broadband optical spectra sensor is placed. The broadband optical spectra sensor senses both the ultraviolet energy of the corona... | 01/02/2007 |
| 7145760 | Tap changer monitoring A method and means for diagnosing transformer tap changers is provided. Pressure is monitored in an insulating liquid of a tap changer for a period of time in which switching of the tap changer is carried through. Switching-related information is extracted from the ... | 12/05/2006 |
| 7096443 | Method for determining the critical path of an integrated circuit A method of determining the critical path of a circuit includes first determining the paths, their mean path transit times and their path transit time fluctuations. Paths having similar statistical parameters are combined to form one path group. For each path group,... | 08/22/2006 |
| 7075309 | System and method to locate an anomaly of a conductor A system (20) and method to locate an anomaly (22) of a conductor (24) is provided. The system (20) uses a test set (28) to inject a test signal (36) into the conductor (24) at a location (PT) and a probe (... | 07/11/2006 |
| 7075308 | Blocking impedance A power line distribution includes one or more impedance devices coupled to the neutral conductor of the power line distribution to segment the power line distribution for fault detection. ... | 07/11/2006 |
| 7042382 | Method of time synchronization of multiple A/D sample data records Multiple analog inputs are converted to respective multiple digital data records by analog to digital converters. A switch inserts a pseudorandom “alignment” code into each analog input at the beginning of conversion. After the analog to digital conversion, this... | 05/09/2006 |
| 7043398 | Method for operating a position measuring device A system for determining a signal running time between a position measuring system and an evaluation unit. The system includes a position measuring system that has a graduation connected to a moving element, a scanning unit that scans the graduation, wherein scannin... | 05/09/2006 |
| 7005862 | Method and apparatus for measuring electric characteristics of cable assembly, and computer product A propagation delay time of a cable assembly is measured by calculating a half of a time difference between a branch point of time-dependent variations of amplitude of reflection coefficient obtained by connecting a first connector with both terminals open-circuited... | 02/28/2006 |
| 6977507 | Cable tester with indicator A system comprises a physical layer device that is adapted to communicate with a cable medium and that includes a first input/output terminal. A first transceiver communicates with the first input/output terminal and the cable medium. A cable tester tests the cable ... | 12/20/2005 |
| 6975312 | Computer system having network connector and method of checking connection state of network cable therefor A computer system having a network connector to which a network cable is connected, including a displaying part displaying a connection state of the network cable; a signal processing part processing a signal inputted through the network connector; and a control par... | 12/13/2005 |
| 6954345 | Generator for producing high voltages A generator for producing high voltages and having at least one generator winding (12) is connected via a generator circuit (10) to a network (19), which generator circuit has means (15, . . . , 17) for protection against overvoltages. Im... | 10/11/2005 |
| 6927579 | Parallel arc fault diagnostic for aircraft wiring A system for locating parallel arcing faults in a set of wires is described. The system includes three devices that can be used in combination or alone. A first device applies a current to a wire while grounding the remaining wires of the set of wires so as to cause... | 08/09/2005 |
| 6923065 | Apparatus for testing aramid fiber elevator cables An apparatus and method for inspecting and calculating the residual strength of an aramid fiber rope driving an elevator to determine when such rope is in need of replacement. The apparatus comprises a transmitter for introducing an acoustic wave that will travel al... | 08/02/2005 |
| 6922062 | Timing markers for the measurement and testing of the controlled impedance of a circuit board Testing of a printed circuit board (PCB) impedance measurement region is performed using time domain reflectometry (TDR) that measures reflections and time delays of pulses injected into an impedance measurement region (impedance coupon). Timing markers are used to ... | 07/26/2005 |
| 6919727 | Accurate time measurement system circuit and method Disclosed is a method of measuring the time signal of an electronic device including steps for measuring a true signal and an inverted signal. The measured true path signal and inverted path signal are combined to reduce measurement error and provide an accurate mea... | 07/19/2005 |
| 6882161 | Method of measuring dielectric constant of PCB for RIMM Disclosed herein is a method of measuring a dielectric constant of a Printed Circuit Board (PCB) for a Rambus Inline Memory Module (RIMM), which includes the steps of measuring a length of a Rambus product of a PCB, applying an input waveform to the Rambus product a... | 04/19/2005 |
| 6853196 | Method and apparatus for electrical cable testing by pulse-arrested spark discharge A method for electrical cable testing by Pulse-Arrested Spark Discharge (PASD) uses the cable response to a short-duration high-voltage incident pulse to determine the location of an electrical breakdown that occurs at a defect site in the cable. The apparatus for c... | 02/08/2005 |
| 6784819 | Measuring skew between digitizer channels using fourier transform A technique for deskewing digitizer channels in an automatic test system includes applying a waveform of known frequency to the input of each digitizer channel. Each digitizer channel samples the waveform to produce a respective data record. A Discrete Fourier Trans... | 08/31/2004 |
| 6774639 | Partial discharge monitoring system for transformers An apparatus for detecting partial discharge in on-line high voltage electrical equipment containing a dielectric, such as high voltage transformers. The apparatus includes an ultrasonic transducer and an annular capacitive plate for detecting, respectively, the ult... | 08/10/2004 |
| 6737877 | Method and circuit for reading a potentiometer Embodiments of the invention describe a method and apparatus used to determine the position of a wiper on a potentiometer without the need for an external ADC. Two capacitors are each connected to an end of a potentiometer, and then are charged or discharged simulta... | 05/18/2004 |
| 6703840 | Methods and apparatuses for automatic process control for biasing and testing heated electrode refrigerant sensors Methods automatic process control of biasing and testing a heated-electrode refrigerant sensor for use in a refrigerant detector. An unbiased sensor may be mounted in a manufacturing station, and while mounted may be biased by applying current to electric... | 03/09/2004 |
| 6696974 | Cable device for detecting and monitoring rock and soil displacement A cable composed of material capable of conducting light, sound, or electricity is inserted by appropriate means into a material to be examined. A portion of said cable having predetermined parameters is fixed internally within the material. The cable is ... | 02/24/2004 |
| 6670816 | Test coupon for measuring a dielectric constant of a memory module board and method of use A test coupon for measuring a dielectric constant of a memory module substrate has a plurality of test pattern layers each having a long trace and a short trace formed thereon. A first test pattern layer has an exposed surface and a second test pattern la... | 12/30/2003 |
| 6662660 | Apparatus for testing aramid fiber elevator cables The invention concerns an apparatus for inspecting and calculating the residual strength of an aramid fiber cable driving an elevator to determine when such cable is in need of replacement. The apparatus includes a transmitter for introducing an acoustic ... | 12/16/2003 |
| 6617869 | Electrical circuit with a testing device for testing the quality of electronic connections in the electrical circuit Given the inventive electrical circuit with a device for testing connections in electrical circuits, the change of a test signal (27) due to the effect of a long line is used for determining the quality of an electrical connection (e.g., of a pin). In par... | 09/09/2003 |
| 6538451 | Single ended measurement method and system for determining subscriber loop make up A method and system for determining the make-up of a subscriber loop having sending pulses onto a loop and acquiring data based on received echo signals. Determining from the received echoes each discontinuity on the loop and, based on each discontinuity,... | 03/25/2003 |
| 6512377 | Method and apparatus for extraction of via parasitics The present invention relates to a via parasitics testing and extracting method for Gigabit multi-layered PCB boards. The method of the present invention is a unique test and extraction process that utilizes a TDR measurement and processes the output data... | 01/28/2003 |
| 6509740 | Methods and apparatus for time domain reflectometry Methods and apparatus for determining the location of a fault or another region of interest in an electrical conductor such as an electrical cable. A preselected electrical signal is applied to the electrical conductor and a reflected signal produced ther... | 01/21/2003 |
| 6486676 | Reflection measurement method and apparatus for devices that are accessed through dispersive elements A reflection measurement method and apparatus measures reflection characteristics of a device under test (DUT) when access to the DUT is through a dispersive element. The method and apparatus measure a composite reflection response of a network that inclu... | 11/26/2002 |
