Switching in NERFET circuits

NERFET is a three-terminal device possessing a pronounced negative differential resistance due to the effect of real-space hot-electron transfer. The device structure, substantially modified compared to our earlier reports, gives an improved performance at room temperature. In this work, logic operation of a circuit formed by two NERFET´s is demonstrated for the first time. Sharp switching of output voltage is observed. Using this circuit, we have demonstrated the operation of an inverter and a bistable switch. Under certain bias configurations the circuit also exhibits a tristable behavior which can be used for ternary logic.