Method, system and analog stimulus-response unit for determining real and imaginary components of an AC response received from a device under test

摘要

In one embodiment, samples of an AC response received from a device under test (DUT) are acquired at an interval, Δt, of k/(f_testN), where k is a number of a discrete frequency response, where f_test is a test frequency of an AC stimulus applied to the DUT, where the test frequency is an integer multiple, M, of a periodic frequency, f, where N is the number of samples acquired, and where M=2k. The real and imaginary components of the AC response are determined, while rejecting the periodic frequency, by processing the samples of the AC response through a discrete Fourier transform.