A 0.67-to-5.4 TSOPs/W Spiking Neural Network Accelerator With 128/256 Reconfigurable Neurons and Asynchronous Fully Connected Synapses

被引：2

作者：

Qi, Xiang'ao ^{[1
,2
]}

Li, Xiangting ^{[1
,2
]}

Lou, Yuqing ^{[1
,2
]}

Li, Yongfu ^{[1
,2
]}

Wang, Guoxing ^{[1
,2
]}

Tang, Kea-Tiong ^{[3
]}

Zhao, Jian ^{[1
,2
]}

机构：

[1] Shanghai Jiao Tong Univ, Dept Micronano Elect, Shanghai 200240, Peoples R China

[2] Shanghai Jiao Tong Univ, MoE Key Lab Artificial Intelligence, Shanghai 200240, Peoples R China

[3] Natl Tsing Hua Univ, Elect Engn, Hsinchu 30013, Taiwan

来源：

IEEE JOURNAL OF SOLID-STATE CIRCUITS | 2024年 / 59卷 / 10期

关键词：

Neurons; Synapses; Integrated circuit modeling; Circuits; Brain modeling; Micromechanical devices; Computational modeling; Asynchronous fully connected synapse; Izhikevich (IZ); leaky integrate and fire (LIF); neuromorphic circuits; reconfigurable neuron; spiking neural networks (SNNs); MODEL;

D O I：

10.1109/JSSC.2024.3402208

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Spiking neural networks (SNNs) are garnering increasing attention due to their potential to explore the complexities of the human brain and utilize its capabilities. The broad spectrum of applications presents challenges in designing SNN-based neuromorphic systems First, the SNN uses complex models e.g., Izhikevich (IZ) for brain simulations and simpler models e.g., Leaky Integrate and Fire (LIF) for efficient machine learning, presenting a challenge in realizing neuron circuits supporting diverse applications. Second, densely connected networks with uneven spike distributions lead to Network-on-Chip (NoC) congestion and delays, complicating the optimization of throughput/area. An SNN accelerator, featuring 128/256 reconfigurable neurons and asynchronous fully connected synapses, has been developed to address these challenges. The reconfigurable neuron circuit is capable of switching between the LIF neuron model and the IZ neuron model. The proposed chip achieves a peak power efficiency of 5.37 TSOPs/W and throughput of 25.6 MSOPs/s. The near-threshold operation of neurons, in conjunction with asynchronous fully connected synapse, reduces energy by 9.42 x to a 9.27 pJ/pixel in image feature extraction.

引用

页码：3366 / 3377

页数：12