VHDL implementation of a low frequency low pass IIR filter

Digital filters are taking over analog filters as the main choice to modify and shape signals. In implementing a digital filter, Computer Aided Design (CAD) tools are often used to simplify and ease the task. An IIR filter is designed using algorithms and is programmed using the VHDL language. Based on the design specification, careful choice of implementation method and tools can save a lot of time and work. Mentor Graphics software is an excellent tool to implement and simulate a digital filter. Thus, the filter can be analysed and redesigned based on the requirements and specification.