Universal current-mode filters and parasitic impedance effects on the filter performances

Authors:
Erkan Yuce;Shahram Minaei
Affiliations:
Department of Electrical and Electronics Engineering, Pamukkale University, 20017 Kinikli-Denizli, Turkey;Department of Electronics and Communication Engineering, Dogus University, Acibadem, Kadikoy 34722, Istanbul, Turkey
Venue:
International Journal of Circuit Theory and Applications
Year:
2008

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Abstract

In this letter, two universal current-mode (CM) filters for simultaneously realizing low-pass, band-pass and high-pass characteristics are proposed. Both of the presented filters can also realize notch and all-pass responses with interconnection of the relevant output currents. They employ second-generation current-controlled conveyors (CCCIIs) and only grounded capacitors. They also have low active and passive element sensitivities along with electronically adjustable angular resonance frequency (ω0) and quality factor (Q). Based on the first developed filter, the parasitic impedance effects of the conveyors on the filter performances are investigated in detail. Simulation results using SPICE simulation program are included to verify the theory. Copyright © 2007 John Wiley & Sons, Ltd.