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A Novel Voltage-Mode Universal Filter Using A Single CFA
N.A. Shah, M.F. Rather and S.Z. Iqbal

A novel voltage-mode universal filter using absolute minimum number of active and passive components is presented. The filter uses only one inverting current feedback amplifier (CFA), two resistors and two capacitors, which is bare minimum requirement for this class of filter. The filter besides being devoid of component matching conditions is capable of implementing lowpass (LP), bandpass (BP), highpass (HP) and notch responses from the same topology. However, implementation of allpass (AP) signal needs a unity gain inverter. The active and passive sensitivity figures are inferior to unity. PSPICE simulation results confirming the theoretical results are included.

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