Chapter Seven. Specialized Digital Networks and Filters

We begin this chapter by presenting three useful digital networks—differentiators, integrators, and matched filters—that are common in the world of DSP. Beyond generic applications that require derivatives to be computed, differentiators are a key component of FM (frequency modulation) demodulation. A common application of integration is computing the integral of stock market prices over some period of days to determine trends in stock price data. Matched filters are used to detect the arrival of a specific discrete signal sequence, such as a radar return signal.