Delay Analysis for Current Mode Threshold Logic Gate Designs

Current mode is a popular CMOS-based implementation of threshold logic functions, where the gate delay depends on the sensor size. This paper presents a new implementation of current mode threshold functions for improved gate delay and switching energy. An analytical method is also proposed in order to identify quickly the sensor size that minimizes the gate delay. Simulation results on different gates implemented using the optimum sensor size indicate that the proposed current mode implementation method outperforms consistently the existing implementations in delay as well as switching energy.