Thermal-Noise-Exploiting Operations of Single-Electron Majority Logic Circuits with Conventional Clock Signals

摘要

This paper describes a thermal-noise-exploiting single-electron majority logic circuit. The circuit is based on a single-electron majority logic circuit using an irreversible single-electron box that was proposed in 2003. To correctly operate the original circuit, unconventional two-step clock signals are needed to decide and hold logical outputs. Moreover, the temperature is set to 0 K because the circuit is very sensitive to thermal noise. This circuit uses conventional clock signals that lack the first step of the two-step clocks used for deciding the output, and the circuit is placed in a thermal-noise environment. The key for correct circuit operation is to base the circuit system on a model of noise-exploiting neural networks, i.e., the stochastic resonance system. The system can stochastically detect a weak input signal with the help of external noise. Thermal energy in the proposed circuit should compensate for lack of the first step of the two-step clocks. In this study, the thermal-noise-exploiting majority logic circuit was designed, and its operation was tested by using a Monte Carlo simulation. As a result, the circuit operation was evaluated, and the circuit performance was found to be improved by increasing the temperature to $T le$ 5 K, i.e., the proposed circuit can exploit thermal noise energy for correct operation.