Synthesizing active filters

The primary purpose of this article is to present a unified, comprehensive survey of accomplishments in the field of network synthesis for linear, lumped, and finite networks from 1965 through early 1968.* Because of the large number of contributions made during this period, only a sampling of the many significant works is presented here, with much of the material in the form of results. It is the author´s hope that the extensive list of references included will be useful in providing the additional information necessary.