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Self dual l.t.a. filters

Self dual l.t.a. filters

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© The Institution of Electrical Engineers
Published

In this paper self-dual linear transformation active (l.t.a.) filter structures are introduced. The general linear transformation approach is constrained to this end to produce the necessary and sufficient conditions for self duality from which active-RC realisations of given lossless ladder filters are effected. Further degrees of freedom within the self-dual concept are then effectively utilised to produce active-RC realisations of highly modular form. These concepts are developed in this paper and are also applied to the design of two filters, the performance of which is most satisfactory.

Inspec keywords: network synthesis; active filters

Other keywords: R property; linear transformation; self duality; active RC realisations; modular form; lossless ladder filters; active filters

Subjects: General circuit analysis and synthesis methods; Active filters and other active networks

References

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      • H.G. Dimopoulos , A.G. Constantinides . The LTA filters. IEEE Trans.
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      • F.E.J. Girling , E.F. Good . Active filters-a practical approach on feedback amplifier theory. Wireless World
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      • A.G. Constantinides , G. Haritantis . Wave active filters. Electron. Lett. , 254 - 256
    4. 4)
      • Dimopoulos, H.G., Constantinides, A.G.: `Linear transformation techniques for active simulation of ladder filters', Proceedings of the 1977 summer symposium on circuit theory, Prague, p. 170–174.
    5. 5)
      • H. Wupper . Scattering parameter active filters and reduced number of active elements. IEEE Trans. , 318 - 322
    6. 6)
      • A.G. Constantinides , H.G. Dimopoulos . Active RC filters derivable from LC ladder filters via linear transformations. IEE J. Electron. Circuits & Syst. , 17 - 21
    7. 7)
      • G.S. Moschytz . (1975) , Linear integrated networks (design).
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      • H. Wupper , K. Meerkötter . New active filter synthesis based on scattering parameters. IEEE Trans. , 594 - 602
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