A novel method of transformation of op.-amp.-based circuits to adjoint ones based on CCII's is presented. The new method relies on an adjoint CCII-based subcircuit of the op. amp. feedback-impedance elementary structure. The proposed subcircuit can directly replace op. amps. with feedback impedance in a filter and transform it to an adjoint with high frequency capabilities. Application to Friend-Deliyannis biquad and PSPICE simulation verify the correctness of the method.
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Papazoglou et al. (1998) studied this question.
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