Silicon-Based Floating-Body Synaptic Transistor With Frequency-Dependent Short- and Long-Term Memories

A new synaptic transistor was fabricated with two separated gates based on a FinFET structure in order to mimic short- and long-term memories in a biological synapse and connect with a postsynaptic neuron circuit directly. The transition between short- and long-term memories occurred after applying repetitive input pulses and strongly depended upon intervals between input pulses. These findings indicate that it has very similar learning characteristics with a biological synapse and the possibility as a synaptic device in neuromorphic systems.