Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Phase comparison
Patent
1974-08-02
1976-05-04
Smith, Alfred E.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Phase comparison
324 77B, 324 79R, G01R 2300
Patent
active
039551377
ABSTRACT:
A compressive or "microscan" signal processor adapted for the simultaneous measurement of multifrequency signal components which encompass a broad frequency spectrum. In accordance with one embodiment of the invention, the applied signals are processed through a mixer which is driven by a linear frequency versus time waveform sweep signal. The output from the mixer is applied to one input port of a nonlinear correlator, and a second input port of the correlator is supplied with a linear frequency versus time waveform signal whose slope is opposite from that of the sweep signal applied to the mixer. The output signal from the correlator comprises a series of pulses which are displaced in time as a function of the frequency of the corresponding portions of the applied signals, and whose amplitudes are representative of the relative energy distribution of the applied signals.
REFERENCES:
patent: 3283264 (1966-11-01), Papadakis
patent: 3548306 (1970-12-01), Whitehouse
Harrington John B.
Waldner Michael
Hughes Aircraft Company
Link, Jr. Lawrence V.
MacAllister W. H.
Smith Alfred E.
Tokar Michael J.
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