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7389449 Edge selecting triggering circuit  
A triggering circuit asserts a trigger signal in response to edges of a digital signal conveying a repetitive pattern of edges. The triggering circuit generates first data having a value...
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...
7339365 Phase detector and method of phase detection  
In order to provide a phase detector and a method of phase detection which are distinguished by greater sensitivity and simple implementability, at least one differential signal of two input...
7295938 Clock jitter calculation device, clock jitter calculation method, and clock jitter calculation program  
In a voltage drop analysis step S 101 , the process calculates a temporal variation of a power source voltage supplied to each cell along a transmission path of a clock signal. In a delay variation...
7193407 Test apparatus and testing method  
There is provided a test apparatus for testing a device-under-test, having a reference clock source for generating reference clock for controlling operations of the device-under-test, a clock...
7142993 Determining a difference between a level of power to be supplied and an estimate  
In one embodiment, an apparatus comprises a device to provide an estimate of supplied power circuitry configured to direct a level of power to be supplied to a load and configured to determine a...
7135896 Output buffer circuit and semiconductor integrated circuit  
Replica output buffers, having the same input/output characteristic as that of an output buffer, respond to the rise of a TEST signal generated by a test pulse generating circuit and causes an...
7129794 Phase detector for reducing noise  
The present invention provides a method and an apparatus for reducing noise. The apparatus includes a phase detector adapted to determine a phase difference between a first and a second signal, a...
7126324 Precision digital phase meter  
A method of measuring phase includes receiving an analog signal; converting the analog signal into a digital signal; representing the digital signal as N sets of samples; aligning the N sets of...
7126323 Systems and methods for synchronous detection of signals  
Systems and processes for synchronous demodulation of signals in detection contexts in order to improve frequency, magnitude and/or phase response over pulsed signal methods. According to a...
7091714 Gain and phase detector having dual logarithmic amplifiers  
A gain-phase detector differentially processes the outputs from two logarithmic amplifiers to provide ratiometric gain measurement, thereby eliminating intercept as a parameter. Hard-limited...
7081760 Method of diagnosing a broken bar fault in an induction motor  
A method for diagnosing induction motor broken bar faults using the resultant magnetic field pendulous oscillation phenomenon is disclosed. Broken bar faults cause the resultant magnetic field of...
7023198 Semiconductor device and method of inspecting the same  
A semiconductor chip is provided with a phase comparison circuit ( 1 ), in addition to an integrated circuit implementing a normal operation. The phase comparison circuit ( 1 ) compares phases...
7013227 System and method for determining harmonic contributions from non-linear loads  
A system and method for determining harmonics caused by non-linear loads are disclosed. Briefly described, one embodiment is a method comprising metering voltage on an electric power system;...
7012420 Measuring device to record values, in particular angles or linear segments  
A measuring device for the recording of values, in particular angles or linear values, includes a measured value processor and a sensor arrangement, which supplies two phase-shifted signals....
6995552 Voltage modulator circuit to control light emission for non-invasive timing measurements  
An apparatus accurately measures the time difference between two signal edges by optically detecting the emission from a “beacon device” that is modulated as a function of time difference....
6891362 Method and apparatus for estimating the phase of a signal  
An input signal is a complex vector whose phase is a coherent measurement of the phase rotation occurring between two separated symbols of a received CDMA signal. A processing block ( 30 ) provides...
6868135 Method and apparatus for correcting for a phase shift between a transmitter and a receiver  
A method and apparatus for correcting for a phase shift between a transmitter and receiver comprising the steps of: a) transmitting a signal from a transmitter ( 14 ); b) receiving the...
6834244 Resolver phase calibration system and method  
A resolver phase calibration system comprises a reference pulse generation unit, a resolver-to-digital converter (RDC), and a calibration phase calculating unit. The reference pulse generation unit...
6825646 Method for determining the position of the rotor of a synchronous alternating-current permanent-magnet machine  
A method for determining a position of a rotor of a synchronous alternating-current permanent-magnet machine includes injecting a high-frequency voltage superimposed on a voltage delivered by a...
6794857 Apparatus and method for measuring a phase delay characteristic  
A phase delay characteristic measuring apparatus includes an in-phase component calculating means for outputting a correlation value between input sampling data of the input signal and the output...
6731101 Modulation semiconductor integrated circuit device and testing method for oscillation circuit  
In accomplishing an LC-oscillation VCO circuit which is immune to frequency deviation and a frequency-hopping radio communication apparatus using the VCO circuit, a modulation semiconductor...
6720749 Three-phase motor protector apparatus  
A three-phase motor protector uses two toroids to monitor all three phases of a three-phase motor. Current and phase loss are monitored directly in phases A and B while the phase C current level is...
6696828 Integrated circuit and lot selection system therefor  
An integrated circuit for testing a PLL circuit that includes a phase error generator to receive a signal gained by dividing an oscillated signal from a voltage controlled oscillator and a...
6693416 Method and device for measuring the phase shift between a periodic signal and an output signal at an output of an electronic component  
A method and a device for measuring a phase shift between a periodic signal and an output signal at an output of an electronic component. A supply voltage potential is applied to a electronic...
6690151 Phase detection circuit  
An apparatus is described for determining whether the power applied to two outlets is in phase or out of phase. Two plugs are used, one for engaging each of the outlets. A circuit coupled to both...
6670800 Timing variation measurements  
Measuring timing variations in a periodic signal includes producing trigger signals in an integrated circuit in response an externally-generated periodic signal. First and second oscillation...
6642702 Detection circuit for maximum value of three phase signal and detection method of the same  
A detection circuit for a maximum amplitude value of a 3-phase signal wherein the three phase-signals having a phase difference of 120° from each other is converted to sampling data of digital...
6639413 System and method for calibration of data in an electric power monitoring system  
The error compensating system and method is used in electric power monitoring systems, e.g. protective relays, and includes a test unit for applying a test signal to the front end of a data...
6601004 Method and apparatus for measuring parameters of an electronic system  
Timing errors in digital transmission systems, such as maximum time interval error, are measured with data samples processed in a first stage to produce in real-time a first, time-varying series of...
6598004 Jitter measurement apparatus and its method  
A signal under measurement is converted into a digital signal by an AD converter, and a band-pass filtering process is applied to the digital signal to take out only components around a fundamental...
6574168 Time measuring device and testing apparatus  
A time measuring device includes: an input signal detecting unit for detecting three or more edges in an input signal and to output three or more detection signals in parallel, the three or more...
6566856 Closed-loop magnetoresistive current sensor system having active offset nulling  
A magnetoresistive sensor system having resistive elements changing in ohmic value in the presence of a magnetic field of a current being measured. The variant values of the elements are amplified...
6528982 Jitter detector, phase difference detector and jitter detecting method  
A jitter detector obtains a phase difference between input signals as a digital value to make jitter between the signals easily detectable. The jitter detector includes comparison pulse generator,...
6525523 Jitter measurement apparatus and its method  
A signal under measurement is transformed into a complex analytic signal using Hilbert transformation to estimate an instantaneous phase of the signal under measurement from the complex analytic...
6522122 Jitter measuring device and method  
A signal to be measured is waveform-formatted to a square waveform that retains the frequency, duty ratio and jitter component of the original signal, and the leading (or trailing) edge of the...
6484112 Method for estimating the frequency of a time signal  
A method for estimating the frequency of a time signal by means of a discrete Fourrier transformation and interpolation between support points of the DFT spectrum. According to said method, the...
6479978 High-resolution measurement of phase shifts in high frequency phase modulators  
A phase difference to duty-cycle circuit converts a phase shifted signal and a reference signal into a single signal having a duty cycle that is a function of the phase difference between the two...
6459999 Method for detecting phase failure in an asynchronous machine  
In order to identify phase failure in an asynchronous machine, monitoring of the phase currents is performed, a trigger signal being generated for each phase in the event of a limit value being...
6459257 Measuring system for measuring power and/or power factors at at least one measuring point in an a.c. voltage network  
To minimize the outlay for circuit engineering in a measuring system having at least one measuring instrument for measuring power and/or power factors at least one measuring point in an a.c....
6426712 Fault-signal generators and methods for resolver systems  
Resolver systems are described that generate an estimate φ of a rotatable member's position angle θ and provide fault signals which monitor the reliability and accuracy of the estimate. The fault...
6329808 Method and system for the detection, by inductive coupling, of a load modulation signal  
A system for the detection of a load modulation signal by inductive coupling includes an antenna circuit having a coil, a circuit for applying an excitation signal having a predetermined frequency...
6265902 Slip-detecting phase detector and method for improving phase-lock loop lock time  
An improved digital phase detector is provided for detecting and compensating for a cycle slip between a reference signal and a frequency source signal, the reference and frequency source signals...
6249750 Phase detector  
Apparatus for measuring the phase of a predetermined incoming data sequence comprising, sampling means operable under control of a sampling clock to sample the incoming sequence at a frequency not...
6175810 Method of generating a signal identifying a three-pole short-circuit occuring in a three-phase power transmission line  
A method for generating a signal identifying a three-pole short-circuit occurring in a three-phase power transmission line in which the phase currents and phase voltages are sampled forming phase...
6141626 Two-element energy meter having systems for automatic service type detection  
A 2-element, three voltage connection electronic energy meter is disclosed for measuring 3-phase electrical energy supplied by a 4-wire delta service without external potential transformers. The...
6130531 Phase angle measurement method and system in electric power systems  
6112159 Robust electrical utility meter  
The present invention includes an electrical utility meter operable to measure power consumption. The method detects and compensates for one or more wiring errors that affects the power consumption...
6112158 Service type recognition in electrical utility meter  
Disclosed is a method and arrangement for use in an electrical utility meter, the electrical utility meter operable to be connected to a plurality of electrical service types. The arrangement is...
6057691 Delay element testing apparatus and integrated circuit having testing function for delay elements  
A delay element testing apparatus has a signal generator for generating a plurality of signals, at least one of which is variable in timing; a phase comparator for making a comparison of a...
Matches 1 - 50 out of 229 1 2 3 4 5 >