Table of Contents
ISRN Electronics
Volume 2013, Article ID 478213, 5 pages
Research Article

A New MISO-Type Voltage-Mode Universal Biquad Using Single VD-DIBA

1Department of Electronics and Communication Engineering, Maharaja Agrasen Institute of Technology, Rohini, New Delhi 110086, India
2Department of Electronics and Communication Engineering, F/O Engineering and Technology, Jamia Millia Islamia, Jamia Nagar, New Delhi 110025, India

Received 23 January 2013; Accepted 19 February 2013

Academic Editors: M. Hopkinson and G. Maruccio

Copyright © 2013 K. L. Pushkar et al. 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 multiple-input single-output-(MISO-)-type multifunction voltage-mode universal biquadratic filter employing single voltage differencing differential input buffered amplifier (VD-DIBA), two capacitors, and one resistor are proposed. The proposed structure can realize second-order low pass, high pass, band pass, band stop, and all pass filter responses without altering the circuit topology. The proposed new filter configuration also provides the following advantageous features, not available simultaneously in any of the single active device /element-based universal biquad in realizing all the five filter functions known earlier so far: (i) no requirement of any passive component(s) matching condition or inversion of input signal(s), (ii) independent electronic control of angular frequency ( ) and bandwidth (BW), and (iii) low active and passive sensitivities. SPICE simulation results have been included using 0.35 µm TSMC technology to confirm the validity of the proposed new universal biquadratic filter configuration.