Abstract
A universal voltage-mode second-order filter with three inputs and one output employing one current feedback amplifier, one voltage follower, two capacitors and two resistors is presented. It offers the following features: realization of allpass, notch, highpass, bandpass and lowpass signals from the same configuration, no requirements for component-matching conditions, orthogonal control of natural frequency and bandwidth, low active and passive sensitivities, minimum active and passive components and cascadability.
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