Active-C Universal Filter Using a Single Active Building Block
Neeta Pandey and Sajal K. Paul
Two new topologies of active-C universal filter are described. Both the circuits employ a single recently proposed active building block namely differential voltage current controlled conveyor transconductance amplifier (DVCCCTA) and two capacitors. They do not use any resistor. The filter enjoys low sensitivity performance and low component spread; and exhibits electronic tunability of filter parameters via bias currents of DVCCCTA. Using 0.25μm TSMC CMOS technology parameters, PSPICE simulation results are included.
Keywords: active-C filter; DVCCCTA; VM and CM filters; current mode block