NASA NTRS · 19700038714
A multipurpose frequency-response analyzer
Abstract
Closed loop frequency response analyzer with steepest descent computing procedure to obtain in-phase and quadrature signal components in linear or nonlinear systems
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Kohr, R. H., Sprague, C. H.. 1969-11-01. A multipurpose frequency-response analyzer. https://ntrs.nasa.gov/citations/19700038714
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