Neuron circuit

A neuron circuit comprising:

• a synapse element configured to receive output signals of a pre-neuron circuit and a post-neuron circuit, a weight of the synapse element being changed depending on the output signals of the pre-neuron circuit and the post-neuron circuit;
• a synaptic integration unit including a capacitor charged by a current flowing through the synapse element depending on the output signals of the pre-neuron circuit and the post-neuron circuit;
• and
• a pulse generation unit configured to generate an output pulse from a charging voltage of the capacitor, the output pulse being fed back to the synapse element as the output signal of the post-neuron circuit,
• wherein the pulse generation unit includes:
• a pulse generation circuit configured to generate the output pulse depending on the charging voltage of the capacitor;
• and
• an overflow signal retaining unit connected between the capacitor and the pulse generation circuit, the overflow signal retaining unit being configured to retain an overflow signal exceeding a threshold voltage among the charging voltage of the capacitor after the pulse generation unit fires.