Naslov
Use of "Lossy" LP-BP-Transformation in Active Second-order BP Filter Design Procedure

Autori
Jurišić, Dražen ; Mijat, Neven

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

Izvornik
Proceedings on the 2nd International Symposium on Image and Signal Processing and Analysis / Lončarić, Sven; Babić, Hrvoje - Zagreb : Birotisak, 2001, 491-495

Skup
Image and Signal Processing and Analysis - ISPA 2001

Mjesto i datum
Pula, Hrvatska, 19.06.2001. - 21.06.2001

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Active-RC Filters;Second-Order Band-Pass Filters;Lossy LP-BP-Transformation

Sažetak
In this paper the design of second-order band-pass (BP) active RC filters using a modified low-pass to band-pass (LP-BP) frequency transformation is presented. The transformation is applied to a first-order low-pass (LP) filter as the (odd-order-)prototype, from which a single-amplifier second-order BP filter is constructed. The operational amplifier is added to the first-order LP circuit in order to provide a low output impedance and supply a positive feedback loop to enable a pole shifting process needed in the realization. It is shown that a BP filter can be realized by substitution of resistor and capacitor in the low-pass prototype filter, by serial and parallel RC circuits in the resulting band-pass structure. A Schoeffler sensitivity is used as a measure of the magnitude sensitivity to component tolerances. A step-by-step design procedure is verified for several second-order band-pass filter circuits, using different impedance scaling ratios, resulting by different sensitivities. It is shown that the circuit with equal impedance scaling ratios yields the best results. Obtained results are double-checked using PSPICE.

Izvorni jezik
Engleski

Znanstvena područja
Elektrotehnika

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