A single-amplifier biquad active filter

1 July 1972

journal article
Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Circuit Theory

Vol. 19 (4) , 398-403
https://doi.org/10.1109/tct.1972.1083474

Abstract

A single-amplifier circuit is introduced and shown to be capable of realizing any second-order minimum-phase voltage transfer function while maintaining an isotopic structure. Sensitivity analysis demonstrates that the single-amplifier biquad (SAB) is comparable to other state-of-the-art active filters employing more amplifiers. A bandpass SAB together with an extra amplifiers enables the realization of right-half-plane zeros.

Keywords

This publication has 10 references indexed in Scilit:

Some New Configurations for Active Filters
IEEE Transactions on Circuit Theory, 1972
Sensitivity analysis of third-order filters†
International Journal of Electronics, 1971
A General Approach to Twin-T Design and Its Application to Hybrid Integrated Linear Active Networks
Bell System Technical Journal, 1970
Design of hybrid integrated-filter building blocks
IEEE Journal of Solid-State Circuits, 1970
Realisation of gyrators using operational amplifiers, and their use in RC-active-network synthesis
Proceedings of the Institution of Electrical Engineers, 1969
State-Variable Synthesis for Insensitive Integrated Circuit Transfer Functions
IEEE Journal of Solid-State Circuits, 1967
RC -active synthesis using positive-immittance convertors
Electronics Letters, 1967
Gyrator-flotation circuit
Electronics Letters, 1967
Two-step precision tuning of twin-T notch filter
Proceedings of the IEEE, 1966
Active RC filters employing a single operational amplifier to obtain biquadratic responses
Proceedings of the Institution of Electrical Engineers, 1965