Weight updating floating-gate synapse

A novel floating-gate synapse circuit is designed to update the weight in spike time dependent plasticity (STDP) system. The update of the weight is implemented through tunnelling and injection mechanisms using floating-gate metal-oxide semiconductor field-effect transistors. The importance of this circuit is for obtaining a storage mechanism for synaptic strength to implement the learning signal processing application on silicon. A novel floating-gate synapse circuit and a new integrate-and-fire neuron model are described to implement weight updating in a STDP system.