Behavioral model for Z-copy Voltage Controlled Current Follower Differential Input Transconductance Amplifier and its features

This contribution introduces behavioral model of multi-terminal active device providing electronically adjustable control of its parameters so-called Z-copy Voltage Controlled Current Follower Differential Input Transconductance Amplifier (ZC-VCCFDITA). Behavioral model is based on elements available in standard PSpice libraries in order to show that modeling of elements, blocks and sub-blocks representing specified functions can be easy. Furthermore, using of commercially available devices allows experimental test without expensive on-chip implementation. The model allows electronic control of intrinsic current input resistance of the current input terminal and transconductance control by DC voltages. Features of the model are verified by simulation.