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A comparative study of multiple amplifier active RC biquadratic sections
Author(s) -
Padukone Pradeep R.,
Ghausi Mohammed S.
Publication year - 1981
Publication title -
international journal of circuit theory and applications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.364
H-Index - 52
eISSN - 1097-007X
pISSN - 0098-9886
DOI - 10.1002/cta.4490090406
Subject(s) - amplifier , transfer function , sensitivity (control systems) , bandwidth (computing) , electronic engineering , uncorrelated , control theory (sociology) , mathematics , operational amplifier , topology (electrical circuits) , function (biology) , physics , computer science , engineering , telecommunications , electrical engineering , statistics , combinatorics , control (management) , artificial intelligence , evolutionary biology , biology
Biquadratic sections play an important role in the design of high order active filters. This paper compares a number of popular multiple amplifier active RC biquads on the basis of their sensitivities as well as ω 0 and Q enhancement effects due to finite amplifier gain–bandwidth products ( GB ). For sensitivity comparison, statistical sensitivity measures, which take into account the tolerances of various passive and active elements, are used. Simple expressions for gain, phase and transfer function sensitivities are derived for the case of uncorrelated element variations. Graphic illustrations of the effects of increasing ω 0 and Q on the sensitivity measures are presented. In addition, root‐loci, which show the effects of GB on the network poles are included. To further facilitate the comparison, graphs demonstrating changes in ω 0 and Q due to GB are also presented.