A second‐order active bandpass filter with complex coefficients and its applications to the hilbert transform
Xiaoxing Zhang, Yuji Shinada · Electronics and Communications in Japan (Part III Fundamental Electronic Science) · 1996
Abstract In this paper, the direct realization of a second‐order active bandpass filter with complex coefficients using operational amplifiers, resistors, and capacitors is proposed and its application to the Hilbert transform is discussed. Then, an active analytic signal converter is realized through real coefficient circuits that are required for signal processing with complex coefficients. Finally, examples of these realizations are presented. the feasibility of the proposed circuit is confirmed by the simulation results which are in good agreement with the theoretical values.