Digital Filters in CMOS Technology: Design, Topology and Performance

Considering the importance and role of a digital filters in contemporary electronic systems, this paper explores the influence of filter's class and topology on performance of filter realized in CMOS technology. After the general overview of the two main-stream approaches to digital filter design, the impact of filter's class and topology will be examined through three filter realizations. Two infinite impulse response filters based on critical monotonic amplitude characteristic analog prototypes with bilinear and custom developed s-to-z transformations will be presented. For finite impulse response realization famous ParksMcCllelan optimization algorithm is used. The presented design examples are implemented using the front- and back-end industrystandard tools. The impact of design choice on final, physical, form (layout) of the presented filters will be shown considering the key parameters such as cost of fabrication, silicon area and power consumption in 65nm CMOS process node.