Published in Proceedings of the 2001 IEEE International Symposium on Circuits and Systems: Sydney, NSW, Australia, Volume 1, May 6, 2001, pages 21-24.
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NOTE: At the time of publication, the author Vladimir Prodanov was not yet affiliated with Cal Poly.
This paper deals with Gm-C biquadratic filters that use grounded capacitors. We derive all practical HP and notch filter topologies that do not require critical component matching. The aim of this derivation was to discover new architectures. The result of this derivation is quite unexpected: there are only three distinct topologies (one notch and: two high-pass). None of them is particularly new because all reported in the literature biquad circuits are their embodiments.
Electrical and Computer Engineering