Digital filters
The rapid growth of micro-electronics and personal computers has meant that the characteristics of low-pass, band-pass and high-pass filters can be readily implemented in software form. This chapter describes the behaviour of a variety of digital filters in terms of convolution, impulse response, amplitude and phase response, using only elementary mathematics.
Much of the necessary groundwork – sampled-data signals and convolution – has already been outlined in Chapters 3 and 4. Examining the principles which support the design before presenting applications will encourage you to experiment.
Digital filters have numerous attractions: size, cost and flexibility favour the digital filter. Its response is independent of component ...
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