New Resistorless FDNR Simulation Configuration Employing CDDITAs

In this research work, a frequency-dependent negative resistance (FDNR) simulation circuit using a new active element, namely current differencing differential transconductance amplifier (CDDITA) has been designed. The developed configuration is an active-C circuit employing two CDDITAs along with only two capacitors. The presented configuration simulates the behaviour of a grounded FDNR without any requirement of passive/active element value matching and the working of proposed circuit found excellent under non-ideal considerations. To demonstrate the performance of presented simulator, an active second-order voltage mode band-pass filtering circuit is developed and simulated. All the theoretical results are confirmed by running PSPICE simulation using CMOS-based model of CDDITA.