Comparison of Huelsmann Basic Biquad with View to the Decrease of the Attenuation over the Transient Frequency of the Operational Amplifier

Bohumil Brtník; David Matoušek; Miroslav Stehlík; Vojtěch Stejskal

doi:10.37394/23201.2020.19.26

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WSEAS Transactions on Circuits and Systems

Print ISSN: 1109-2734, E-ISSN: 2224-266X

Volume 19, 2020

Comparison of Huelsmann Basic Biquad with View to the Decrease of the Attenuation over the Transient Frequency of the Operational Amplifier

Authors:

Abstract: The signal processing at discrete time requires an aliasing filter at the input and a reconstruction filter at its output. In this paper, selected basic structures of biquads are described and compared with a view to the decrease of the attenuation over the transient frequency of the operational amplifier. Concretely, low-pass and band-pass Huelsman (i.e. multi feedback) structure are confronted with the limits of a real operational amplifier. Firstly, the reasons of the decreasing of the attenuation are explained theoretically. Secondly, these conclusions are verified by simulations. These simulations were performed by spice-like circuit simulator MicroCap version 10.

Keywords: Low-pass, Band-pass Filters Structure, Real Operational Amplifier, Frequency Response, Decreasing of the Attenuation at High Frequencies

Pages: 245-249

DOI: 10.37394/23201.2020.19.26

WSEAS Transactions on Circuits and Systems, ISSN / E-ISSN: 1109-2734 / 2224-266X, Volume 19, 2020, Art. #26

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Comparison of Huelsmann Basic Biquad with View to the Decrease of the Attenuation over the Transient Frequency of the Operational Amplifier

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