Synaptic Hardware Model Depending on High Frequency Stimulation and Oscillation Frequency

We previously proposed a hardware model that can reproduce the TSTDP (triplet spike timing dependent synaptic plasticity) characteristics. However, this model has frequency dependence only when T
_post
-T
_pre
is positive. In this paper, we propose a model that has frequency dependence even when T
_post
-T
_pre
is negative, moreover, the synaptic strength changes according to the frequency stimulation to pre cell body model. As a result, even if T
_post
-T
_pre
is negative, the frequency dependence is obtained, and the change in synaptic strength increases as the frequency of high frequency stimulation increases.