Naslov
Low-Noise Active-RC Allpole Filters Using Optimized Biquads

Autori
Jurišić, Dražen ; Moschytz, George S. ; Mijat, Neven

Izvornik
Automatika : Časopis za automatiku, mjerenje, elektroniku, računarstvo i komunikacije (0005-1144) 51 (2010), 4; 361-373

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Low sensitivity; low noise; low-; high-; and band-pass active-RC filters; single-amplifier biquads; allpole filters.
(Low sensitivity; low noise; low-; high-; and band-pass active-RC filters; single-amplifier biquads; allpole filters)

Sažetak
In this paper it is shown that active-RC filters can be designed to have low-sensitivity to passive components and at the same time possess low output thermal noise. The design procedure of low-noise and low-sensitivity, positive-feedback, second- and third-order low-pass allpole filters, using impedance tapering, has already been published. The noise analysis in this paper was extended to the high-pass and band-pass filters and those with negative-feedback. The optimum designs, regarding both noise and sensitivity of most useful filter sections were summarized in the table form (as a cookbook) and demonstrated on examples. The classical methods were used to determine output noise spectral density and total rms output noise of filters. It was found that low-sensitivity filters with minimum noise have reduced resistance levels, low Q-factors, low-noise operational amplifiers and use impedance tapering design.

Izvorni jezik
Engleski

Znanstvena područja
Elektrotehnika

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