Synaptic Tunnel Field-Effect Transistors for Extremely-Low-Power Operation

A synaptic cell composed of two tunnel field-effect transistors (TFETs) which is capable of XNOR operation for binary neural networks has been experimentally demonstrated. Our proposed synaptic TFETs feature lower current during inference and higher programming efficiency during weight transfer than conventional synaptic transistors. Moreover, the fabricated synaptic TFET arrays satisfy the neurobiological energy requirement $(\!\sim 10$ fJ per synaptic event) and low bit-error rate of $6.7\times10$ ⁻⁷ %.