An adaptive silicon synapse

Chicca E, Indiveri G, Douglas R. An adaptive silicon synapse. Presented at the Proceedings of the 2003 International Symposium on Circuits and Systems (ISCAS).We present an analog circuit for implementing models of synapses with short-term adaptation, derive analytical solutions for spiking input signals, and present experimental results measured from a chip fabricated using a standard 1.5 μm CMOS technology. The circuit is suitable for integration in large arrays of integrate-and-fire neurons and consequently for evaluating computational roles of short-term adaptation at the network level