A NOVEL FUNCTIONAL LOGIC-CIRCUIT USING RESONANT-TUNNELING DEVICES FORMULTIPLE-VALUED LOGIC APPLICATIONS

We have demonstrated a novel functional logic circuit using resonant-t unneling devices. By integrating six InGaAs-based resonant-tunneling d iodes (RTDs) and one HEMT on an InP substrate, we achieved room-temper ature operation of an analog-to-quaternary quantizer, or an inverter i n 4-valued logic. The circuit is suitable for multiple-valued logic ap plications because it exhibits multiple thresholds as well as multilev el output using a simple circuit configuration.