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Combining the processing power and flexibility of modern DSP based test-systems with the broad area of joint time-frequency signal analysis yields a potentially promising new line of research in the area of analog and mixedsignal test. This paper discusses some practical examples of applying analyses tools, like the Short-Time-Fourier and Wavelet Transform for testing ADCs. The research focuses on gaining insight into the advantages of these analysis techniques, for instance in revealing device performance deviations or faults which are not detectable using conventional analysis tools, and also the ability t o cover the same faults in a single test which would have taken several tests using conventional methods.

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