Implementing Digital Filters in VHDL
An important part of systems that interface to the “real world” is the ability to process sampled data in the digital domain. This is often called sampled-data systems (SDS) or operating in the Z-domain. Most engineers are familiar with the operation of filters in the Laplace or S-domain where a continuous function defines the characteristics of the filter and this is the digital domain equivalent to that.
Figure 32.1 RC filter in the analog domain
This has the equivalent S-domain ...