Study of practical problems in two-loop CCTA based biquad: Finite attenuations in stop bands

Autor:	Zdenek Kincl, Kamil Vrba, Tomas Dostal, Jan Jerabek, Roman Sotner
Předmět:	Engineering business.industry law.invention Filter (video) law Control theory Operational transconductance amplifier Current conveyor Operational amplifier business Driven element Active filter m-derived filter Digital biquad filter
Zdroj:	Scopus-Elsevier
Popis:	Quite neglected and underlying problem of modern active functional blocks is presented and demonstrated in this contribution on a current-mode active filter. The discussed problem is an undesirable transfer in stop band of multifunctional frequency filters. It is caused by several occasions related to small-signal parameters of active elements (impedance levels) in the circuit. In some cases it leads to parasitic feedback and undesirable transfers in circuit. Problems are discussed on example with KHN-type filter where quite novel active element known as Current Conveyor Transconductance Amplifier (CCTA) is used.
Databáze:	OpenAIRE
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