Question

8-4) Lathi & Ding, Prob. P.5.1-10 (a) A first-order-hold circuit can also be used to reconstruct a signal g) from its samples. The impulse response of this circuit is h(f) = Δ(2,-2) where Ts is the sampling interval. Consider a typical sampled signal R() and show that this circuit performs the linear interpolation. In other words, the filter output consists of sample tops connected by straight-line segments. Follow the procedure discussed in Sec. 5.1.2 (Fig. 5.6) for a typical signal g(1) (b) Determine the transfer function of this filter and its amplitude response, and compare it with the ideal filter required for signal reconstruction.

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Answer 1

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