All PSoC Application Notes

AN2312: nth Order IIR Filtering Graphical Design Tool for PSoC

High performance filtering has been implemented in a variety of industry standard Digital Signal Processing (DSP) chips. However, many applications don’t require the high sampling rates and cost normally associated with these dedicated DSP chips. This Application Note presents an alternative for implementing high order IIR DSP filtering using inexpensive PSoC chips. A Biquad IIR filtering algorithm and MATLAB® Graphical User Interface (GUI) code and coefficient generation tools are developed that can dramatically reduce the time to deploy a digital filtering project for the PSoC. Links are provided for an example project and filter generation MATLAB source code.