Naslov
Real Amplifier Influence on Impedance Tapered 2nd-Order Filters

Autori
Stojković, Nino ; Jurišić, Dražen ; Mijat, Neven

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Proceedings of the Region 8-IEEE International Conference on Computer as a Tool (EUROCON 2003). Vol. 1 / Zajc, Baldomir ; Tkalčić, Marko - Ljubljana : IEEE Region 8, Slovenia Section, 2003, 110-113

ISBN
0-7803-7763-X

Skup
Region IEEE International Conference on Computer )as a Tool (8 ; 2003

Mjesto i datum
Ljubljana, Slovenija, 02.02.2003. - 24.09.2003

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
active-RC filters; active sensitivity; passive sensitivity; impedance tapering

Sažetak
In this paper, an influence of real parameters of operational amplifier to the impedance tapered filter transfer function is analyzed. As an example, a second-order low-pass (LP) and high-pass (HP) Sallen and Key filters with Butterworth and Chebyshev transfer function approximations are considered. Design tables with normalized element values for both cases are given. The filter elements were calculated using three different design criteria: equal resistors, capacitors and impedance tapered elements. Filter transfer functions are obtained using ideal and real operational amplifier. Real model of common operational amplifier is presented. Active sensitivities for all presented filters are shown. The results obtained by the analyses show significant influence of real amplifier in the frequency ranges higher than 100kHz. Reduction of active sensitivities is obtained using impedance tapering, which fortunately, reduces the passive sensitivities as well.

Izvorni jezik
Engleski

Znanstvena područja
Elektrotehnika, Računarstvo

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