A new configuration requiring no external capacitors in the realization of the biquadratic voltage transfer function is developed. The proposed network contains resistors and two operational amplifiers represented by the one-pole roll-off model. It has very low sensitivities with respect to all passive and active parameters, and is suitable for medium-Qhigh-frequency applications. Laboratory experiments confirm the validity of the theory and demonstrate the versatility of the circuit as the biquadratic building block.
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Kim et al. (1977) studied this question.
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