Abstract: “In this paper we propose an implementation technique for sequential circuit using threshold logic. With the advancement of nano technology threshold gate based logic design has got a new direction. In this paper first negative edge triggered D flip-flop has been designed. Then negative edge triggered T flip-flop has been designed .Finally threshold gate based counter has been realized. The proposed design has been verified by means of simulation using VHDL.”

Keywords: Threshold logic gates, Single electron tunneling (SET), Resonant tunneling diode (RTD), Counter, Very Large Scale Integration (VLSI)