engleski

Noise Properties of High-order BP OTA-C Filter Structures

Different realizations of 8th order band-pass filters using bipolar OTA-C structures are analysed from the noise and dynamic range point. Noise voltage spectral density, RMS noise voltage and dynamic range are calculated for Cascade, Cascade of Biquarts, Follow-the-Leader-Feedback and Leap-Frog filter structures. The analyses results are compared to the results obtained from the filter structures using operational amplifiers. They are also confirmed by PSPICE simulation. The best noise properties for small signal level gives the Leap-Frog 8th order OTA-C filter structure.

analog filters; band-pass structures; transconductance amplifier; noise; dynamic range

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