Low-Sensitivity, Single-Amplifier, Active-RC Allpole Filters Using Tables
Dražen Jurišić, G.S. Moschytz, Neven Mijat · University of Zagreb University Computing Centre (SRCE) · 2008
Low-Sensitivity, Single-Amplifier, Active-RC Allpole FiltersUsing Tables UDK 621.372.57IFAC 4. 3.2 Original scientific paperA single-amplifier, active-RC filters design procedure for common filter types, such as Butterworth and Chebyshev, using tables with normalized filter component values, is presented.The considered filters consist of RC ladder network in operational amplifier's positive feedback path.Tables with normalized component values having equal capacitors and equal resistors were presented by some authors [1,2].In this paper, we presented new tables for designing filters with optimized sensitivity to passive circuit components.A considerable improvement in sensitivity is achieved using the design technique called »impedance tapering«.The presented filters are up to the 6 th -order.The sensitivity problem generally limits the use of higher than 6 th --order single-amplifier filters.Low-pass and high-pass filters design is presented.