Inductorless elliptic filters with reduced number of capacitors using signal-flow graphs

Drazen Jurisic, Neven Mijat, George S. Moschytz

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Scopus citations


In this paper a method of realizing elliptic filters using signal-flow graphs is presented. Elliptic filters having a minimum number of capacitors are compared with those having a higher number of capacitors. This number is particularly significant when comparing filters realized in balanced-to-ground and unbalanced form. The version with a canonic number of capacitors provides area savings in IC form, whereas both (filters with a minimum [i.e. canonic] number of capacitors and those having a higher number of capacitors) have a low sensitivity to component tolerances. The sfg derivations necessary to realize higher-order elliptic filters with a reduced number of capacitors is presented. Transfer function magnitudes are simulated using the PSpice program. Monte Carlo runs confirm the low sensitivity to component tolerances of both circuit types.

Original languageEnglish
Title of host publicationIEEE EuroCon 2013
Number of pages8
StatePublished - 2013
EventIEEE EuroCon 2013 - Zagreb, Croatia
Duration: 1 Jul 20134 Jul 2013

Publication series

NameIEEE EuroCon 2013


ConferenceIEEE EuroCon 2013


  • Elliptic filters
  • IC design
  • Low sensitivity to component tolerances
  • Signal-flow graphs
  • Small chip area


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