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Active and Passive Electronic Components
Volume 23, Issue 3, Pages 157-161

Multi-Function Active-Only High-Order Current-Driven Filter

King Fahd University of Petroleum and Minerals, Box 203, Dhahran 31261, Saudi Arabia

Received 29 April 2000; Accepted 12 July 2000

Copyright © 2000 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


A new multi-function high-order current-driven filter is proposed. The filter uses only operational amplifiers, and operational transconductance amplifiers (OTAs). Without using any external passive elements, a variety of high-order input-current/output-current and/or input-current/output-voltage responses can be realised without changing the circuit topology and without any matching or cancellation conditions. The parameters of the high-order filter responses can be electronically tuned by adjusting the bias currents of the OTAs.