New multifunction biquadratic filter circuit with inherently stable Q -factor

24 November 1977

journal article
Published by Institution of Engineering and Technology (IET) in Electronics Letters

Vol. 13 (24) , 719-721
https://doi.org/10.1049/el:19770507

Abstract

A new 3-amplifier biquad of the 2-integrator-loop type is introduced. Like the Akerberg-Mossberg circuit, the new circuit exhibits extremely stable Q-factor if the amplifiers have good matching and tracking properties. In addition, the new circuit provides simultaneous realisation of the three basic filtering functions, and hence is suitable for use as a universal filtering module.

Keywords

THREE AMPLIFIER BIQUAD
TWO INTEGRATOR LOOP TYPE
MULTIFUNCTION BIQUADRATIC FILTER CIRCUIT
UNIVERSAL FILTERING MODULE
AKESBERG MOSSBERG CIRCUIT
INHERENTLY STABLE Q-FACTOR

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