Realizations of voltage-mode biquad filters using a single Unity-Gain Sum Difference Amplifier
نویسندگان
چکیده
In this paper, new configurations of voltagemode biquadratic filters with single input and three outputs are presented. The proposed configurations employ a DDCC (Differential Difference Current Conveyor) variant namely the Unity-Gain Sum Difference Amplifier (UGSDA) and use two operational transconductance amplifiers (OTAs) and two grounded capacitors. The circuits have the following advantageous features: (i) simultaneously realizing highpass (HP), band-pass (BP) and low-pass (LP) filters, (ii) high input impedance (iii) canonic with low component count, (iv) use of grounded capacitors which is suitable for monolithic integration, (v) no requirement of componentmatching, (vi) current tunability and (vii) low active and passive sensitivities. B2SPICE simulations are included which validate the workability of the proposed circuit.
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