Analog VLSI spiking neural network with address domain probabilistic synapses

We present an analog VLSI address-event transceiver containing an array of integrate-and-fire neurons and a scheme for implementing a reconfigurable neural network with probabilistic synapses. Neural “spikes” are transmitted through address-event representation-the address of the sending neuron is communicated through an asynchronous request and acknowledgment cycle. Continuous-valued synaptic weights are implemented by probabilistically routing address events. Results from a prototype system with 1024 analog VLSI integrate-and-fire neurons, each with up to 128 probabilistic synapses, demonstrate these concepts in an image processing application