An Area-Efficient Integrate-and-Fire Neuron Circuit with Enhanced Robustness against Synapse Variability in Hardware Neural Network

Table 1

Comparison among the performances of reported neuron circuits and the proposed one in this work.

References	Synaptic input	Neuron model	Circuit type	Technology node (µm)	Firing frequency	Power consumption (μW)	Special features
[18]	Current	Conductance-based	Analog	—	∼300 Hz	60	Neuro-physiological principles
[23]	Current	Integrate-and-fire	Analog	1.5	∼1.2 kHz	1.5	Spike frequency adaptation
[26]	Current	Hindmarsh–Rose	Mixed mode	0.25	∼2 kHz	163.4	Time-scaling techniques
[27]	Current	Izhikevich	Analog	0.35	∼1 MHz	40	Firing pattern and shape
[28]	Current	Integrate-and-fire	Mixed mode	0.8	∼100 Hz	120	Spike-based learning
[29]	Voltage	Integrate-and-fire	Mixed mode	—	∼1 kHz	—	Positive feedback neuron
This work	Current	Leaky integrate-and-fire	Analog	0.35	∼5 kHz	∼14.7	Resilience against the synaptic device fluctuations