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Low Voltage High Quality Multifunctional Filter Using Operational Floating Conveyor
T. Parveen, S. S. Rajput and M. T. Ahmed

The paper presents a new circuit realization of multifunctional filter using a low voltage CMOS Operational Floating Conveyor (OFC) based ideal grounded inductor. The circuit is without any matching constraints. The proposed inductance simulator is realized using only grounded passive components, which makes it attractive for IC implementation. The proposed grounded inductance simulator (GIS) is used to realize a multifunctional filter, which provides three standard second order responses: low pass, band pass and high pass. The circuit enjoys attractive features, such as low bias voltage, low sensitivities and independent Q-tuning of the filter without affecting its pole frequency. Simulation results show excellent performance at low voltage operation of ± 0.75 volts.

Keywords: Multifunctional filter, operational floating conveyor, inductance simulator, low voltage.

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