We develop and evaluate a new family of active-RC, gyrator-based, voltage-mode, biquadratic filters capable of realizing all standard second-degree filtering functions at microwave frequencies. Each biquad employs two negative second-generation current conveyors (CCII−s) or, equivalently, two infinite-conductance transistors, and we obtain excellent simulated results by implementing each of these perfect elements as a cascaded pair of MMIC GaAs FETs. The transistors in the simulation are modeled using tabulated S parameters of MB3000 (Phillips) devices. In addition, we catalog all known ideal, two-transistor negative impedance converter (NIC) topologies and we show that some are intrinsically better than others with respect to their performance when the active elements are implemented using MMIC GaAs FET CCII−s.
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S.E. Sussman-Fort (1998) studied this question.