FEN Filter Design Using Tantalum and Silicon Integrated Circuits

George S. Moschytz

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31 Scopus citations


An economical approach to integrated active RC filter design is described. Complex filter networks are broken down into a series of cascadable second-order filter sections consisting of tantalum thin-film RC networks and semiconductor integrated operational amplifiers. Two building blocks are available for any desired frequency within a decade and for any desired filter function (e.g., low-pass, high-pass, band-pass, band-reject, all-pass, etc.). One building block is for low Q realizations and contains one amplifier: the other is for high Q realizations and contains two. The considerable versatility of this approach is obtained by 1) a network synthesis approach based on decomposing a given second-order function into a low Q asymptotic approximation of this function in cascade with an active frequency emphasizing network and 2) by the characteristics of tantalum and silicon integrated circuits.

Original languageEnglish
Pages (from-to)550-572
Number of pages23
JournalProceedings of the IEEE
Issue number4
StatePublished - Apr 1970
Externally publishedYes


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