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4642563 |
Power line impulse measurement system
An impulse measurement system for displaying impulses in an alternating current electromagnetic energy waveform, the impulses generally occurring at frequencies substantially greater than that for...
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4616320 |
Seismic strong-motion recorder
A digital recorder and method for digitizing and recording seismic events, the recorder being capable of lengthy stand-by periods during which it records lesser events of little interest in a...
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4581705 |
Method and machine for metering electric parameters
The electric parameter metering machine comprises electric parameter pickup circuitry for sensing the instantaneous analog amplitude value of a electric parameter waveform in at least one phase in...
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4536844 |
Method and apparatus for simulating aural response information
Speech and like signals are analyzed based on a model of the function of the human hearing system. The model of the inner ear is expressed as signal processing operations which map acoustic signals...
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4534004 |
Apparatus and method for determining signal parameters of periodic square wave signals
A method and apparatus for determining the phase angle between two periodic square wave signals is disclosed in which the two square wave signals are applied to respective inputs of an exclusive OR...
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4525667 |
System for observing a plurality of digital signals
A signal observation system for displaying a plurality of digital signals simultaneously on a CRT screen. The signals may be displayed individually or may be logically combined and displayed as the...
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4495586 |
Waveform acquisition apparatus and method
A waveform acquisition apparatus and method permits a plurality of samples of an input signal to be taken for each trigger recognition event, and stored at predetermined memory addresses to provide...
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4467433 |
Device for determining a trigger point on an electric signal with given amplitude distribution over time
The device comprises an evaluation unit and at least one transducer for feeding the electric signal to this unit on the occurrence of a characteristic event and the evaluation unit comprises a...
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4463431 |
Signal amplitude indicating apparatus
Test equipment for measuring the amplitude of certain a.c. signals and comprising, a signal processing means responsive to each of such a.c. signals for transforming that signal into a d.c. level...
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4405990 |
Apparatus for determining the ratio of two signal repetition rates
A measurement circuit which is rendered insensitive to temperature and other environmental quantities comprising first and second electrically identical sensor elements (10, 12) which are...
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4400809 |
Arbitrary drive for magnetic field waveform control
Disclosed is a method and apparatus for digital implementation and closed loop feedback of magnetic field waveforms utilizing three channels of a four channel incrementally programmable voltage...
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4355367 |
Waveform synthesizer arrangement
A waveform synthesizer arrangement for use in an audible output device is adapted to synthesize desired waveforms and includes a digital filter to reduce the generation of output noise. A time...
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4335442 |
Synchronous oscillator demodulator system
A synchronous oscillator demodulator for linear variable differential transformers and synchronous resolvers having electronic circuitry designed to digitally construct a preferred waveform of a...
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4298942 |
Nonlinear amplitude detector
A nonlinear amplitude detector generates signal amplitude from the signal's inphase and quadrature components based on a Binomial series expansion. The amplitude detector significantly reduces the...
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4231094 |
Method and device for determining the phase intercept in a system employing phase-shift keying modulation
A method and device for measuring the slope of the envelope delay characteristic of a transmission channel and deriving the phase intercept value therefrom. A measurment signal having a frequency...
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4091379 |
Analog to digital wave shaping system
An analog to digital wave shaping system comprising, a source of analog signals, adaptive threshold circuitry coupled to said source, said adaptive threshold circuitry having an output selected as...
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4075697 |
Apparatus for monitoring two electric quantities by combining three consecutive samples of each quantity
Apparatus for monitoring two sinusoidal electric quantities of a common period, comprises two similarly timed samplers, an arithmetic unit for combining, in accordance with a preselected relation,...
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4073008 |
Apparatus for calculating amplitude values
The amplitude value of a sinusoidal wave is calculated by operating means which processes absolute values of two data samples which are sampled from the sinusoidal wave at two points spaced 90°...
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4073009 |
Apparatus for calculating amplitude values of sinusoidal waves
The apparatus comprises a sampling hold circuit for sampling the amplitude of a sinusoidal wave at a predetermined frequency, a data sample extracting circuit for extracting two data samples at two...
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4064488 |
Sampled signal detector
A few cycles of an input signal are correlated, or compared, with a few cycles of the input signal received at a previous interval and the interval is varied when correlation, or a positive...
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4041288 |
Voltage level display circuit
A voltage level display circuit for providing a display of the magnitude of the reference voltage level to a comparator circuit. A microprocessor is responsive to an input command signal to...
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4001559 |
Programmable measuring
A communications line under test intercouples programmable local units, one of which transmits an analog waveform to the other in response to digital control signals received from a computer. The...
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3994285 |
Revolving symmetrical magnet assembly and improved method of blood flow detection
A pair of magnets is adapted to be rotated into several positions around the periphery of a limb for the purpose of producing the magnetic field used in blood flow measurements. Electrodes are...
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3990011 |
Method and apparatus for determining AM modulation factor
The modulation factor for an AM signal wherein the modulation signal is an A. C. wave is determined by demodulating the AM signal, obtaining the average D. C. level and peak deviation therefrom for...
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3984759 |
Apparatus for use in an induced polarization system for measuring the deformation of a periodic signal concealed in noise
An apparatus for measuring the deformation parameters of a periodic signal concealed in noise. The signal is transmitted by a transmitter controlled by a stable clock and received by a receiver...
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3731075 |
AUTOMATIC RATE TRACKER
7. In a signal position determining means for determining the exact posit of the maximum correlation in a correlation function signal cycle obtained from a correlation circuit for comparing equally...
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3675210 |
METHOD AND APPARATUS FOR THE TRANSMISSION OF ACQUIRED DATA IN THE FORM OF MAGNITUDE REPRESENTING SIGNALS AND SIGNALS REPRESENTING CHANGES OF SCALE OF MAGNITUDE
A data acqusisition system is described which enables efficient utilization of a limited data channel by transmitting data signals representing magnitude of a sampled parameter, together with...
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3621388 |
ELECTRONIC WAVE ANALYZER FOR DETERMINING THE FREQUENCY AND AMPLITUDE OF COMPONENTS IN A COMPLEX WAVEFORM
A wave analyzer capable of determining the amplitudes and phases of frequency components in a complex waveform. he selection of a frequency component is determined by the frequency of an external...
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3614409 |
TIMING DEVICE, PARTICULARLY FOR CHROMATOGRAPHS
A waveform-analyzing system, particularly for use with chromatographs, wherein the waveform is integrated between selected characteristic points thereof, and selected peaks of the waveform are used...
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3614408 |
WAVEFORM ANALYZING SYSTEM, PARTICULARLY FOR CHROMATOGRAPHS, WHEREIN THE WAVEFORM IS INTEGRATED BETWEEN SELECTED PEAKS AND VALLEYS
A waveform analyzing system, particularly for use with chromatographs, wherein the waveform is integrated between selected peaks and valleys thereof, wherein a recycling timing device is used to...
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3610894 |
PEAK ANALYSIS SYSTEMS
A peak analysis system for analyzing the peaks and troughs of a variable comprising an analog-to-digital converter for producing a train of impulses, each impulse digitally representing a...
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3538505 |
WAVEFORM MEASURING SYSTEM AND METHOD
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3412241 |
Analog-digital integrator and recorder for analysis
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3366951 |
Waveform averaging and contouring device for weather radars and the like
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3281687 |
Apparatus for analyzing a signal having a plurality of peaks by normalization
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3187303 |
Digital peak reader
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3162808 |
Wave form analyzing method for establishing fourier coefficients
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3043515 |
Signal analyzing apparatus
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2970261 |
Signal analyzer
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2833469 |
Totalizer
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