Izvorni znanstveni članak
Low-Sensitivity, Single-Amplifier, Active-RC Allpole Filters Using Tables
Dražen Jurišić
; Faculty of Electrical Engineering and Computing,
George S. Moschytz
; Swiss Federal Institute of Technology, (ETHZ-ISI), Zürich, Switzerland
Neven Mijat
; Faculty of Electrical Engineering and Computing,
Sažetak
A 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 6th-order. The sensitivity problem generally limits the use of higher than 6th-order single-amplifier filters. Low-pass and high-pass filters design is presented.
Ključne riječi
active-RC filters; minimal-RC filters; low power; low sensitivity; normalized components
Hrčak ID:
29348
URI
Datum izdavanja:
28.11.2008.
Posjeta: 2.001 *