Digital Signal Processing, Control and Hybrid Circuits

In this chapter, we make some remarks on digital and hybrid signal processing. As stated in the preface, this is not the main topic of this book. Here, we make a “gentle introduction” to sampled data and digital signal processing.The main tool used in digital and discrete-time control and signal processing is the Z-transform. We recall here the properties and applications of this tool. However, no advanced theoretical considerations about the Z-transform are provided. We mention only the minimal set of Z-transform properties, necessary to understand the sampled-data and digital signal processing. Practical applications in audio circuits are described, including analog and hybrid delay lines.