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http://dx.doi.org/10.5573/JSTS.2016.16.5.657

Simulation Study on Silicon-Based Floating Body Synaptic Transistor with Short- and Long-Term Memory Functions and Its Spike Timing-Dependent Plasticity  

Kim, Hyungjin (Inter-university Semiconductor Research Center (ISRC) and the Department of Electrical and Computer Engineering, Seoul National University)
Cho, Seongjae (Department of Electronic Engineering, Gachon University)
Sun, Min-Chul (System LSI, Semiconductor Business Group, Samsung Electronics Co. Ltd.)
Park, Jungjin (Inter-university Semiconductor Research Center (ISRC) and the Department of Electrical and Computer Engineering, Seoul National University)
Hwang, Sungmin (Department of electrical engineering, Seoul National University)
Park, Byung-Gook (Inter-university Semiconductor Research Center (ISRC) and the Department of Electrical and Computer Engineering, Seoul National University)
Publication Information
JSTS:Journal of Semiconductor Technology and Science / v.16, no.5, 2016 , pp. 657-663 More about this Journal
Abstract
In this work, a novel silicon (Si) based floating body synaptic transistor (SFST) is studied to mimic the transition from short-term memory to long-term one in the biological system. The structure of the proposed SFST is based on an n-type metal-oxide-semiconductor field-effect transistor (MOSFET) with floating body and charge storage layer which provide the functions of short- and long-term memories, respectively. It has very similar characteristics with those of the biological memory system in the sense that the transition between short- and long-term memories is performed by the repetitive learning. Spike timing-dependent plasticity (STDP) characteristics are closely investigated for the SFST device. It has been found from the simulation results that the connectivity between pre- and post-synaptic neurons has strong dependence on the relative spike timing among electrical signals. In addition, the neuromorphic system having direct connection between the SFST devices and neuron circuits are designed.
Keywords
Neuromorphic system; synaptic transistor; short- and long-term memory; spike timing-dependent plasticity (STDP);
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