National Instruments

The importance of digital filters is well established. Digital filters, and more generally digital signal processing (DSP) algorithms, are classified as discrete-time systems. They are commonly implemented on a general purpose computer, on a dedicated DSP chip, or in a Field Programmable Gate Array (FPGA) chip. Because of their well-known advantages, digital filters are often replacing classical analog filters. In this application note, we introduce a new digital filter design and analysis tool with which developers can work within a graphical development environment to interactively design, analyze, and implement digital filters. Highlights of the software include the ability to work with live signals to facilitate real-world filter testing and the ability to automatically generate LabVIEW and ANSI C code for targeting a DSP, an FPGA, or other embedded systems.