. . . "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." . . "Proceeding of the 8th International Conference on Electrical and Electronics Engineering" . . . "CCTA, stop band attenuation, non-zero input impedance, finite output impedance"@en . . . . "Je\u0159\u00E1bek, Jan" . "RIV/00216305:26220/13:PU106000!RIV15-MSM-26220___" . . "5"^^ . "Neuveden" . "Dost\u00E1l, Tom\u00E1\u0161" . "Study of Practical Problems in Two-Loop CCTA Based Biquad: Finite Attenuations in Stop Bands" . . "108744" . "000333752200010" . "5"^^ . "Study of Practical Problems in Two-Loop CCTA Based Biquad: Finite Attenuations in Stop Bands"@en . "RIV/00216305:26220/13:PU106000" . . "Vrba, Kamil" . "978-605-01-0504-9" . . "The Chamber of Electrical Engineers Bursa Branch (EMO)" . . . "Kincl, Zden\u011Bk" . "Study of Practical Problems in Two-Loop CCTA Based Biquad: Finite Attenuations in Stop Bands" . "2013-11-28+01:00"^^ . "5"^^ . . "[9AA90BA9966A]" . . "26220" . "Bursa, Turecko" . "P(ED2.1.00/03.0072), P(GA102/09/1681), S" . . "Study of Practical Problems in Two-Loop CCTA Based Biquad: Finite Attenuations in Stop Bands"@en . . . "\u0160otner, Roman" . "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."@en . . . .