Novel hybrid virtual analog filters based on the Sallen-Key architecture

Will Pirkle

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Scopus citations


The Sallen-Key filter structure is a revered analog filter design topology. In Sallen-Key lowpass and highpass filters, the cutoff frequency and resonance (Q) controls are decoupled though the cutoff and resonant frequencies are not. In this paper we demonstrate novel variations on the Sallen-Key architecture and we decouple the resonant and cutoff frequencies. This produces multiple hybrid filter designs including resonant quasi-first order lowpass and highpass filters, resonant quasi-first order low and high shelving filters, decoupled resonant second order filters and doublyresonant quasi-second order lowpass and highpass filters. In the doubly-resonant filters all three frequencies may be decoupled and independently adjustable; they also self-oscillate at both resonant frequencies.

Original languageEnglish (US)
Title of host publication137th Audio Engineering Society Convention 2014
PublisherAudio Engineering Society
Number of pages10
ISBN (Print)9781634397483
StatePublished - 2014
Event137th Audio Engineering Society Convention 2014 - Los Angeles, United States
Duration: Oct 9 2014Oct 12 2014


Other137th Audio Engineering Society Convention 2014
Country/TerritoryUnited States
CityLos Angeles

ASJC Scopus subject areas

  • Modeling and Simulation
  • Acoustics and Ultrasonics


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