Abstract

A new general configuration which employs the current feedback op-amp and realizes second-order lowpass, bandpass and highpass responses is given. The proposed filters have the attractive advantage that the effects of the stray capacitance Cz and Rz can be absorbed within the filter components in all of the three cases. The proposed lowpass filter has the additional advantage of having the two capacitors grounded and the effect of Rx can also be absorbed within one of the filter resistors. PSpice simulation results that demonstrate the effects of a nonideal current feedback op-amp are included. Experimental results are also given.

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