Frequency response analyzer

Details Frequency response analyzer Frequency response analyzer

1979-09-17

1982-03-30

Krass, Errol A.

Boots, shoes, and leggings

324 77B, 364579, G01R 2300

Patent

active

043228062

ABSTRACT:
A frequency response analyzer having means for producing a phase modulated test signal for input into the system under test; means for dividing the output signal from the system under test into two channels. Means for multiplying the test signal of each channel by a reference signal; the reference signal of one channel corresponding to the test signal and the other reference signal corresponding to the test signal but being out of phase thereto by 90.degree.; means for integrating the product of each channel, and means for analyzing the resultant signal from each channel.

REFERENCES:
patent: 3328686 (1967-06-01), Fuchs
patent: 3416081 (1968-12-01), Gutleber
patent: 3634760 (1972-01-01), Murtin et al.
patent: 3821482 (1974-06-01), Hirsch
patent: 3988667 (1976-10-01), Roth et al.
patent: 4157457 (1979-06-01), Sakoe et al.

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