Multiprotocol-induced plasticity in artificial synapses.
We suggest a 'universal' electrical circuit for the realization of an artificial synapse that exhibits long-term plasticity induced by different protocols. The long-term plasticity of the artificial synapse is basically attributed to the nonvolatile resistance change of the bipolar resistive switch in the circuit. The synaptic behaviour realized by the circuit is termed 'universal' inasmuch as (i) the shape of the action potential is not required to vary so as to implement different plasticity-induction behaviours, activity-dependent plasticity (ADP) and spike-timing-dependent plasticity (STDP), (ii) the behaviours satisfy several essential features of a biological chemical synapse including firing-rate and spike-timing encoding and unidirectional synaptic transmission, and (iii) both excitatory and inhibitory synapses can be realized using the same circuit but different diode polarity in the circuit. The feasibility of the suggested circuit as an artificial synapse is demonstrated by conducting circuit calculations and the calculation results are introduced in comparison with biological chemical synapses.
Electronic Materials Research Centre, Korea Institute of Science and Technology, 136-791 Seoul, Republic of Korea. dsjeong@kist.re.kr.
Vladimir
V
Kornijcuk
Omid
O
Kavehei
Hyungkwang
H
Lim
Jun Yeong
JY
Seok
Seong Keun
SK
Kim
Inho
I
Kim
Wook-Seong
WS
Lee
Byung Joon
BJ
Choi
Doo Seok
DS
Jeong
D000200:Action Potentials / Q000502:physiology*; D000818:Animals; D032701:Biomimetics / Q000295:instrumentation*; D017097:Electric Impedance; D004867:Equipment Design; D019544:Equipment Failure Analysis; D006801:Humans; D008839:Microelectrodes; D036103:Nanotechnology / Q000295:instrumentation*; D009473:Neuronal Plasticity / Q000502:physiology*; D012815:Signal Processing, Computer-Assisted / Q000295:instrumentation; D013569:Synapses / Q000502:physiology*; D009435:Synaptic Transmission / Q000502:physiology*