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7346464 |
Gait waveform feature extracting method and individual identification system
A gait waveform feature extracting method and an individual identification system extract features of the gait waveform. A one-step waveform corresponding to one step of a walking movement is...
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7321810 |
Method of dynamic economic dispatch
Certain exemplary embodiments provide a method comprising: for an electrical power system comprising a plurality of committed electrical power generating units: for each of the committed electrical...
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7307411 |
Method for signal extraction in a universal sensor IC
A apparatus and method for creating a universally usable and configurable sensor platform which is used in conjunction with various sensor and sensing elements to sense and measure environmental...
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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...
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7253600 |
Constant slope ramp circuits for sample-data circuits
A sample-data analog circuit includes a level-crossing detector. The level-crossing detector controls sampling switches to provide a precise sample of the output voltage when the level-crossing...
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7212930 |
Method and apparatus for phase determination
An electricity metering method and apparatus is provided for determining the phase of first waveform relative to a harmonically distorted, second waveform having cycles temporally distinguished by...
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7126320 |
Evaluation of the characteristics of electric pulses
A circuit for evaluating characteristics of duration and/or shape of an electric pulse induced in an element of an integrated circuit comprising an assembly of elements, each element being likely...
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7046014 |
ATE measurement technique for comparator threshold voltage
A system and a method for testing a comparator include generating two triangular waveform segments having the same period and different amplitudes, inputting the two triangular waveform segments...
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7034515 |
Instantaneous voltage lowering detection device
An instantaneous voltage dip detection device is provided with: all-pass filter ( 2 ) for phase shifting a supply voltage waveform ( 11 ) by 90°; a comparator 7 that outputs a signal when the...
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7019509 |
Digital envelope detector
A digital envelope detector (consisting of both hardware and software) that provides accurate measurements of changes of peak values of an AC signal (these peak values constitute the envelope of a...
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6998835 |
Electromagnetic sensor system and method
An electromagnetic sensor system. The system includes an electromagnetic excitable structure that generates an acoustic signal when irradiated with electromagnetic energy; an acoustic energy...
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6867605 |
Circuit for determining the internal resistance of a linear lambda probe
A device for measuring the probe impedance of a linear lambda probe of an internal combustion engine which is caused by an AC current measurement signal which is fed into the lambda probe,...
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6844715 |
Synthetic RF detection system and method
Outputs of a linear RF detector and a logarithmic RF detector are multiplexed individually to a single digitizer or simultaneously to a respective digitizers. A process generates a composite...
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6806721 |
Digital envelope detector
A digital envelope detector (consisting of both hardware and software) that provides accurate measurements of changes of peak values of an AC signal (these peak values constitute the envelope of a...
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6628923 |
Adaptive phase and amplitude linearization method and apparatus
A apparatus for computing coefficient values for configuring a digital filter for compensating for non-linearity of an RF/IF device. The apparatus includes a reference signal generator, connected...
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6570914 |
Amplitude calculation circuit
An amplitude calculation circuit is capable of permits accurate calculation of an amplitude with quite small circuit scale and power consumption. The amplitude calculation circuit converts input I...
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6525518 |
Method for measuring and controlling oscillations in a wind turbine
A method for measuring and controlling oscillations in a wind turbine with the wind turbine control system using spectrum analysis, to determine the existence and amplitude of vibrations on the...
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6509728 |
Spectrum analyzer having function of displaying amplitude probability distribution effectively
A spectrum analyzer including a signal receiving and processing unit, a sampling unit, a histogram measuring unit, an arithmetic unit and a display unit. The signal receiving and processing unit...
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6369584 |
Signal correction apparatus and signal correction method
A signal correction apparatus includes: a measurement signal generator for generating a measurement signal; a reference signal generator for generating a reference signal; a signal processing...
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6340891 |
Method of diagnosing deterioration of the insulation of an electric power cable
The diagnosis method of deterioration of electric power cable is that which diagnoses the deterioration accurately without a especial effort to reduce the harmonics in an electric power source...
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6313752 |
System for displaying dynamic on-line operating conditions of an interconnected power transmission network
A system for displaying dynamic on-line operating conditions of an interconnected power transmission network including components to monitor the interconnected power transmission network by...
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6157183 |
Two port handheld vector network analyzer with frequency monitor mode
A two port handheld VNA enabling both reflection and transmission measurements to be made over a range of 25 MHz to 3.3 GHz frequency range. The handheld VNA includes a tracking synthesizer which...
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5847558 |
Periodic signal analyzer using a randomly varied phase shifting circuit
A signal sampling circuit receives a clock signal indicative of a sampling rate and a periodic input signal to produce a digitized sampled output signal. The sampled signal is applied to an...
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5818238 |
Apparatus for measuring current and other parameters of an electornic device in response to an applied voltage
A first terminal of a device-under-measurement (DUM) is connected to the input of a buffer amplifier having its output applied to the inverting input of an operational amplifier through a resistor...
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5808462 |
Apparatus for detecting the amplitude and phase of an a.c. signal
An apparatus for detecting the amplitude and phase of an a.c. signal. The apparatus includes a signal detection circuit for detecting the a.c. signal, a signal splitting circuit for splitting the...
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5734579 |
Rotational-device method and system
A rotational-device test system and method is provided to classify a rotational device according to the type of drive sound thereof. A divider divides the time-series data of an amplitude of the...
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5717325 |
Multiprocessing transient event detector for use in a nonintrusive electrical load monitoring system
A multi-processing transient event detector for use in a nonintrusive electrical load monitoring system has been provided. Templates of transient pattern data associated with each electrical load...
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5637994 |
Waveform measurement
The characteristics of an a.c. waveform are determined by measuring the time interval between the instant when the waveform crosses a first reference threshold and the instant when it crosses...
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5576618 |
Process and apparatus for comparing in real time phase differences between phasors
A numerical comparator is disclosed. The numerical comparator employs numerical techniques based upon the behavior of the cylinder unit to compare phasors in real time. In one application of this...
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5557196 |
Jitter analyzer
There is provided a jitter analyzer which finds various quantities in time/frequency domain of a signal to be measured including a discontinuous burst signal by using two successive period...
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5469171 |
HF background noise measurement in HF environments
A frequency surveillance method for monitoring background atmospheric noise evels in unoccupied channels in an operating frequency band of a high frequency communication system. In the method, the...
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H001458 |
Signal amplitude distribution analyzer
A signal amplitude distribution analyzer measures the amplitude probability density function of electrical signals, and in particular, the amplitude probability distribution of noise signals. Such...
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5400261 |
Method and apparatus for wave analysis and event recognition
A method and apparatus for acquiring, recording, synchronizing, analyzing, and interpreting continuous wave data. A process for isolating separate events from wave data composed of multiple events...
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5343405 |
Automatic extraction of pulse-parametrics from multi-valued functions
Automatic extraction of pulse parametrics from multi-valued functions, such as a digital serial communications signal, is achieved by building up an eye pattern data array from multiple...
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5321636 |
Method and arrangement for determining signal pitch
A method and an arrangement are described by means of which a pitch in a signal (s(t)) can be determined. In fact the probability density function (pdf) of the pitch is determined as a function of...
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5296815 |
Device for detecting the type of ballast of a discharge lamp
A portable inspection device is disclosed enabling a user to identify what type ballast means are being employed to operate gaseous discharge lamps. Magnetic ballasts are distinguished from...
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5289500 |
Signal conditioner
A signal conditioner comprising a receiving part, a transmitting part, and a power supply part, wherein the main functions of these components are digitalized and common circuit elements are used...
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5025207 |
Method for the measurement of a steady level in a noise-infested signal and automatic measuring device for the application of this method
The disclosure concerns automatic measuring stands. The automatic measurement of the amplitude of an intermodulation line at the output of a TV transmitter is difficult to achieve because this line...
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5014229 |
Method and apparatus for calibrating transducer/amplifier systems
The present invention improves the accuracy of waveshape measurements and transducers. Specifically, it is a method and apparatus which calibrates a system, which comprises transducers, amplifiers,...
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5003248 |
Probability density histogram display
Disclosed is a probability density histogram display for a digital oscilloscope which shows a probability density histogram display of an input signal waveform alongside the conventional...
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4940947 |
Line noise signal measurement system using analog signal compression with digital linearity correction
A line noise signal measurement system is provided with detecting circuitry for providing a sensed analog signal. Compression circuitry is coupled to the detecting circuitry for providing an...
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4933634 |
Device and method to measure a short radiation pulse or an electric pulse
A device for measuring a single short pulse includes at least one measuring unit (D1, Dn) comprising a conductive line (L) connected to a set of photoconductors (A, B1-Bp), the line and...
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4896109 |
Photoconductive circuit element reflectometer
A photoconductive reflectometer for characterizing semiconductor devices at millimeter wavelength frequencies where a first photoconductive circuit element (PCE) is biased by a direct current...
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4876655 |
Method and apparatus for evaluating jitter
The distribution with respect to time of an event defined by the waveform of a repetitive input signal having a magnitude that lies within a predetermined range of values is observed by generating...
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4845691 |
Group delay time measurement apparatus with automatic aperture value setting function
A frequency converter receives a signal to be measured and a local oscillation signal supplied from a local oscillator and ouputs an intermediate frequency signal. A phase detector detects a phase...
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4837503 |
Remote measurement of high voltage AC with radar
The invention concerns an apparatus and technique for detecting the voltage of A.C. high voltage lines. A radar wave is transmitted towards the high voltage lines and is reflected to a detector...
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4823077 |
Channel-gain-vernier-tracking trigger hysteresis for an oscilloscope
Disclosed is a circuit for maintaining a constant effective hysteresis at the input to a trigger comparator of an oscilloscope for the purpose of preventing double triggering due to false triggers....
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4810959 |
Method of improving signal-to-noise ratio of detected random pulses
The invention detects pulses, and, in response thereto, generates ramp functions with amplitudes corresponding to the interarrival times between successive pulses. These amplitudes are measured,...
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4806845 |
System for measuring and generating electric noise
In measuring and reproducing electric noise applied to an electronic component, the electric noise is envelope-detected and the envelope-detected noise is analog-digitally converted at high speed...
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4794533 |
System activity change indicator
A system for measuring changes in the number of maxima and minima occurring in a signal over time which changes indicate activity changes in a subject from which the signal measured is obtained.
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