ラグランジュの多項式によるD/A変換法

概要

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In this paper, a new technique to convert a digital signal to an analog signal will be introduced by means of Lagrange's interpolation polynomial. For three sample points d_<i-2T> d_<i-T> and d_<i> of a given digital signal, we use a quadratic polynomial f(t) to connect the sample points d_<i-T> and d_<i> so that we get an analog signal between sampling interval i-T and i. By this method we can obtain a perfect analog signal without switching noises. Also, we will propose a circuit to realize this technique.
社団法人電子情報通信学会の論文
1998-09-07