Journal of Sensor Science and Technology (센서학회지)

The Korean Sensors Society (한국센서학회)
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Silicon Based STDP Pulse Generator for Neuromorphic Systems

뉴로모픽 시스템을 위한 실리콘 기반의 STDP 펄스 발생 회로

  • Lim, Jung Hoon (Department of Electronic Engineering, Daegu University) ;
  • Kim, Kyung Ki (Department of Electronic Engineering, Daegu University)
  • Received : 2018.01.25
  • Accepted : 2018.01.30
  • Published : 2018.01.31
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Abstract

A new CMOS neuron circuit for implementing bistable synapses with spike-timing-dependent plasticity (STDP) properties has been proposed. In neuromorphic systems using STDP properties, the short-term dynamics of the synaptic efficacies are governed by the relative timing of the pre- and post-synaptic spikes, and the efficacies tend asymptotically to either a potentiated state or to a depressed one on long time scales. The proposed circuit consists of a negative shifter, a current starved inverter and a schmitt trigger designed using 0.18um CMOS technology. The simulation result shows that the proposed circuit can reduce the total size of neurons, and the spike energy of the proposed circuit is much less compared to the conventional circuits.

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References

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