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New Realizations of Current-Mode and Voltage-Mode Multifunction Filters without External Passive Elements

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In this paper new voltage-mode and current-mode multifunction filters using internally compensated operational amplifiers (OP-AMPs) and single output operational transconductance amplifiers (OTAs) are presented. The proposed voltage mode multifunction filter can realize lowpass, bandpass, highpass responses simultaneously and the current-mode multifunction filter can realize lowpass, bandpass, highpass and bandstop responses simultaneously all at high output impedances. No external passive elements are required thus the circuit is suitable for monolithic implementation either with CMOS or bipolar technologies. All of active sensitivities are low. The performances of the circuits are tested using SPICE simulation program.

Keywords: Current-mode; Filters; Voltage-mode

Document Type: Original Article


Affiliations: 1: Dogus University, Department of Electronics and Communication Engineering, 34722, Acibadem, Kadikoy, Istanbul, Turkey. Fax: +90-216-327 96 31; E-mail: 2: Bogazici University, Electrical and Electronics Engineering Department, 80815 Bebek-Istanbul, Turkey. Fax: +90-212-287 24 65; E-mail: 3: Istanbul Technical University, Faculty of Electrical and Electronics Engineering, Department of Electronics and Communication Engineering, 80626, Maslak, Istanbul, Turkey. E-mail:

Publication date: 2003-01-01

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