|
Match
|
Document |
Document Title |
|
|
7619418 |
Magnetic flowmeter output verification
A magnetic flowmeter transmitter includes a flowtube and measurement circuitry which provides an output related to flow through the flowtube. Output circuitry, such as analog and pulse output...
|
|
|
7605368 |
Vibration-type cantilever holder and scanning probe microscope
A vibration-type cantilever holder holds a cantilever opposed to a sample. The holder supports a main body part of the cantilever at only its base end so that a probe at the free end of the...
|
|
|
7501831 |
Process for the detection of a malfunction in a device for wire sawing and device for practicing said process
The invention relates to a process for the detection of malfunctions, in particular the detection of breakage of a wire in a wire sawing device. The process consists in applying an alternating...
|
|
|
7498821 |
Non-linear observers in electric power networks
In order to make accurate predictions on whether or not a power grid is stable, it is desirable to know the frequency and phase of at least each “control area” in the power grid. Each control...
|
|
|
7443232 |
Active load arrangement
An active load arrangement is used to provide proper output load to an object TO under test. The arrangement Z comprises a voltage_controlled transistor MOSFET having a source S, a gate G and a...
|
|
|
7417438 |
Battery voltage measurement apparatus
A voltage measurement circuit includes a plurality of voltage input terminals that are supplied with voltage outputted by secondary batteries via voltage measurement lines, a plurality of voltage...
|
|
|
7391218 |
Method and apparatus for generalized arc fault detection
A method and an apparatus detect series and/or parallel arc faults in AC and DC systems. The method according to one embodiment inputs an AC current signal; extracts a fundamental component of the...
|
|
|
7372279 |
Power generation unit condition monitor using frequency profile analysis
A power generator unit condition monitoring system can receive a frequency profile generated by a frequency generating component and can transmit the received frequency to a frequency profile...
|
|
|
7208958 |
Antenna for detection of partial discharges in a chamber of an electrical instrument
A sensor for picking up partial discharges in an electrical equipment tank filled with a dielectric fluid includes an antenna responsive to the electromagnetic waves generated by such partial...
|
|
|
7096168 |
Circuit configuration for simulating the input or output load of an analog circuit
In order to simulate the input or output load of an analog circuit, the output of the analog circuit is connected to the input of a driver stage. A measuring element is placed between the input of...
|
|
|
7091727 |
Method and IC for detecting capacitance variation
A method and an integrated circuit for detecting capacitance variation includes the steps of: generating a detection frequency for capacitance variation and a detection frequency which lags the...
|
|
|
7076374 |
Methods and systems for detecting and locating damage in a wire
Methods, systems, and articles of manufacture consistent with the present invention provide for identifying and locating wire damage on a wire. Broadband impedance phase and magnitude information...
|
|
|
7061222 |
Automated testing of frequency converter device
A frequency converter is tested. Labels for a plurality of mixing products are displayed. In response to a user selecting a first mixing product from the plurality of mixing products, appropriate...
|
|
|
7043379 |
Method for quantifying I/O chip/package resonance
A method for quantifying effects of resonance in an integrated circuit's power distribution network is provided. The power distribution network includes a first power supply line and a second power...
|
|
|
6970700 |
Power delivery system
A method and apparatus for measuring the characteristics of radio frequency energy in an industrial radio frequency processing system at a plurality of frequencies is disclosed. The method and...
|
|
|
6959037 |
System and method for locating and determining discontinuities and estimating loop loss in a communications medium using frequency domain correlation
A system for determining characteristics associated with a communication channel includes a transmitter for transmitting a first signal via the communication channel. The system includes a receiver...
|
|
|
6911812 |
Method and apparatus for measuring frequency pulling in oscillators
A test apparatus and method of measuring pulling of the frequency of an oscillator. The apparatus includes a bias tee, a power supply, a spectrum analyzer, a second power supply, a symmetrical...
|
|
|
6876193 |
Method for deconvolution of impedance spectra
A method for deconvoluting a time dependent impedance spectrum and using the deconvoluted time dependent impedance spectrum as an indicator of the performance condition of a working fluid is...
|
|
|
6873161 |
Method and device for detecting accidental arcs
The invention relates to a method for detecting accidental arcs (arc tracking) on a cable ( 1 ), especially on a cable of an aircraft electrical system. According to said method, an alternating...
|
|
|
6870374 |
Process for identifying abnormalities in power transformers
A preferred method for identifying a type of abnormality in an insulation system of a power transformer comprises measuring dielectric losses in a section of the insulation system, calculating...
|
|
|
6856926 |
Frequency margin testing of bladed servers
A frequency margin testing blade is adapted for use in a bladed server. The testing blade is further adapted to provide one or more output clock signals for use as clock inputs to one or more...
|
|
|
6839208 |
Arc fault circuit interrupter recognizing arc noise burst patterns
An arc fault circuit interrupter (AFCI) detects arc faults by identifying the various signature patterns of arc fault noise while rejecting arc mimicking noise from normal load phenomena.
|
|
|
6831466 |
Method and system for sensor fault detection
A system and method for controlling operation of a component include using at least two sensors arranged to sense an operating condition of the component. The system further includes a controller...
|
|
|
6809523 |
On-line detection of partial discharge in electrical power systems
A method and apparatus for on-line detection of partial discharge events in an a.c. power system, in which high frequency electromagnetic pulses generated by partial discharge events are detected...
|
|
|
6785104 |
Low energy pulsing device and method for electrical system arc detection
A pulsing apparatus for an electrical system includes line and neutral terminals structured to input a nominal alternating current line voltage, a timing mechanism or circuit for generating a...
|
|
|
6734698 |
Radio frequency oscillation detector
A Sensor for detecting radio-frequency oscillations of a voltage, and an arrangement of a sensor for detecting radio-frequency oscillations of the voltage in a line. The sensor ( 10 ) has a...
|
|
|
6693434 |
Automated system for estimating ring oscillator reliability and testing AC response and method of operation thereof
An automated system for, and method of estimating ring oscillator reliability and testing AC response of a device under test (DUT). In one embodiment, the system includes: (1) a DUT board that...
|
|
|
6674291 |
Method and apparatus for determining and/or improving high power reliability in thin film resonator devices, and a thin film resonator device resultant therefrom
The effects of electromigration have been shown to lead to damage of metal electrodes of electronic devices such as thin film resonator (TFR) devices in only a few hours, for a test input power...
|
|
|
6636048 |
Method for diagnosing performance problems in cabling
The present invention provides an apparatus for using time domain analysis of NEXT, Return Loss and the like, in conjunction with the application of time or distance referenced limits to verify and...
|
|
|
6577987 |
Operational monitoring for a converter
Monitoring a converter ( 1 ) includes detecting whether a value of an input variable ( 2 ) for the converter ( 1 ) assumes a first prescribed input reference value ( 41 ) and checking whether an...
|
|
|
6566889 |
Line diagnostics for wireline modems
A modem with built-in transmission line diagnostic capability is presented. Said built-in line diagnostics are capable of determining said transmission line's length and detecting the presence of...
|
|
|
6559648 |
Method for operating an electronic overcurrent trip of a power circuit breaker
In power circuit breakers including a current transformer with a current detection coil without any iron and including an integration circuit connected downstream from the current detection coil,...
|
|
|
6545485 |
Ultrasonic pinpointer for power system sources of interference
An ultrasonic RFI source locator implements signal analysis to discriminate ultrasonic shocks emanating from power line equipment sources from ambient and other interference sources, as well as...
|
|
|
6516049 |
Method and apparatus for insertion loss estimation in wireline communications
The current invention provides a method and apparatus for determining insertion loss in wireline communication systems. The method may be implemented with any modulation protocol but is...
|
|
|
6477021 |
Blocking/inhibiting operation in an arc fault detection system
A system for determining whether arcing is present in an electrical circuit includes a sensor for monitoring a current waveform in the electrical circuit, and an arc fault detection circuit which...
|
|
|
6466650 |
Telecom service identification transponder apparatus and technique
Telephone line service type identification is provided to a telephone technician in the field by the placement of one or more tuned circuit(s) across the telephone line. In one embodiment, an...
|
|
|
6459273 |
Arc fault detector method
A sputtering arc fault detector ( 10 ) for a system having an electrical conductor ( 14 ) carrying current to a load. The sputtering arc fault detector includes a current monitor ( 64 ) coupled to...
|
|
|
6456097 |
Fault current detection method
A method for measuring the impedance of electrical distribution equipment includes: applying a voltage at a first selected frequency to electrical distribution equipment, waiting a delay time for...
|
|
|
6430728 |
Acoustic 3D analysis of circuit structures
According to an example embodiment, the present invention is directed to a system and method for analyzing an integrated circuit. A laser is directed to the back side of an integrated circuit and...
|
|
|
6424162 |
Insulated device diagnosing system that prepares detection data from partial discharge signal such that periodic elements are given to different specific frequencies of the partial discharge signal
An insulated device diagnosing system is capable of judging the deterioration, lifetime, and defects of a device. The intensity at each voltage phase angle is measured at a plurality of specific...
|
|
|
6421811 |
Defect detection via acoustic analysis
According to an example embodiment of the present invention, a defect detection approach involves detecting the existence of defects in an integrated circuit as a function of acoustic energy....
|
|
|
6389110 |
Telecom service identification resonator apparatus and technique
Telephone line service type identification is provided to a telephone technician in the field by the placement of one or more tuned circuit(s) across the telephone line. In one embodiment, an...
|
|
|
6381269 |
Test system with signal injection network for characterizing interference and noise tolerance in a digital signal link
A test system for a evaluating a digital signal link includes a data signal generator, a data signal receiver, a digital signal link to be tested and a test interference signal injection (TISI)...
|
|
|
6348801 |
Fault isolation of an antenna path for a radio telephone
A method and a communications device are described, comprising a radio telephone ( 5 ) with connected antenna path ( 1 ) which can be used to locate precisely a defective area (F) in the antenna...
|
|
|
6285193 |
Method of measuring insulation resistance of capacitor and apparatus for screening characteristics
The insulation resistance of a capacitor is accurately measured within a short period of time by applying AC signals at two different frequencies f 1 and f 2 to the capacitor to measure the...
|
|
|
6275044 |
Arcing fault detection system
An electrical isolation device is provided for use in an electrical distribution network having a plurality of branch circuits each defined by line and neutral conductors connected between a power...
|
|
|
6249139 |
Lifetime measurement of an ultra-thin dielectric layer
A method is described for taking a lifetime measurement of an ultra-thin dielectric layer. In order to discover the life time of the ultra-thin dielectric layer, the measurement comprises using...
|
|
|
6242922 |
Arc detection architecture based on correlation for circuit breakers
A low cost mixed analog digital application specific integrated circuit (ASIC) includes a standard central processing it (CPU) programmed to execute a correlation function for arc detection. Use of...
|
|
|
6242900 |
System for measuring partial discharge using digital peak detection
A partial discharge measurement system is provided which comprises a digital peak detection circuit. The partial discharge measurement system digitizes and detects both positive and negative slopes...
|
|
|
6239586 |
System for digital measurement of breakdown voltage of high voltage samples
A breakdown voltage measurement system is provided which employs a digital peak detection circuit for peak voltage measurement. The breakdown voltage measurement system employs a voltage memory...
|