Recent developments and future trends of multirate analog-digital systems

Multirate analog-digital systems contain both analog and digital functions on a single integrated circuit and employ different sampling rates at various stages of the system. Both traditional and emerging new applications of such systems are discussed for converting between analog samples and digital words and for realizing processing functions in an easier and more economical way than that would be possible using purely digital or analog techniques. Specific topics addressed include oversampling converters, new conversion architectures based on quadrature-mirror filter (QMF) banks, analog front-end filtering subsystems for video processing, analog-digital multirate systems, and multirate systems for very narrowband bandpass filtering