Multi-functional Active Filter Design Using Three VDTAs

This paper suggests a single-input multi-output (SIMO) multi-function current mode active filter design using three voltage differencing transconductance amplifiers (VDTAs) as an active element. The filter is realized in current-mode (CM) and delivers several filter operations such as HP, LP, BP, BR and AP filter functions with appropriate connections of input signal. The filter consists of three VDTAs and two capacitors, which are grounded. The significance of the suggested filter is that it provides electronic and independent controllability of filter parameters i.e. pole frequency (ωp) and Q-factor (Q). The filter design is analyzed using Virtuoso Analog Design Environment of Cadence.