ABSTRACT
All modern signal-processing systems include various types of electrical filters that the designer has to realize in an appropriate technology. The literature contains many well-defined filter design techniques [4], [8], [9], and computer programs are available, which help the designer find the appropriate transfer function that describes the required filter characteristics mathematically. We also refer the reader to
Once the filter’s transfer function is obtained, implementation methods must be found that are compatible with the technology selected for the design of the total system. In some situations, considerations of power consumption, frequency range, signal level, or production numbers may dictate discrete (passive or active) filter realizations. Often, however, as much as possible of the total system must be fully integrated in microelectronic form, so that the filters can be implemented in the same technology.
