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Neural Computation

February 15, 1997, Vol. 9, No. 2, Pages 419-440
(doi: 10.1162/neco.1997.9.2.419)
© 1997 Massachusetts Institute of Technology
An Analog Memory Circuit for Spiking Silicon Neurons
Article PDF (309.32 KB)
Abstract

A simple circuit is described that functions as an analog memory whose state and dynamics are directly controlled by pulsatile inputs. The circuit has been incorporated into a silicon neuron with a spatially extensive dendritic tree as a means of controlling the spike firing threshold of an integrate-and-fire soma. Spiking activity generated by the neuron itself and by other units in a network can thereby regulate the neuron's excitability over time periods ranging from milliseconds to many minutes. Experimental results are presented showing applications to temporal edge sharpening, bistable behavior, and a network that learns in the manner of classical conditioning.