A two-port digital discrete-time non-Foster circuit designed for negative capacitance

A digital discrete-time approach is presented for the design of two-port non-Foster circuits. The proposed digital approach offers the potential for effective implementation of complex non-Foster circuits in a wide variety of applications such as wideband metamaterials, broadband impedance matching, electrically small antennas, and artificial magnetic conductors. To illustrate the proposed digital design approach, a straightforward discrete-time implementation of a floating two-port negative capacitance is considered. Simulation results demonstrate the effectiveness of the implementation and design approach in producing -50 pF capacitance.