University of Delaware Neuromorphic Systems Laboratory

Switched-Capacitor Neuromorphs with Wide-Range Variable Dynamics

John G. Elias and David P. M. Northmore
University of Delaware
Newark, DE. 19716

ABSTRACT

The use of switched capacitors as wide-range, programmable resistive elements in spatially extensive artificial dendritic trees is described. We show that silicon neuromorphs with artificial dendritic trees can produce impulse responses that last millions of times longer than the initiating impulse and that dynamical responses are tunable in both shape and duration over a wide range. The switched-capacitor resistors forming a dendritic tree are shown indirectly to have a useful programmable resistance range between 500 Kilo-ohms and 1000 Giga-ohms . Experimental results are presented that show variable impulse response functions, tunable frequency selectivity, and rate-invariance of spatiotemporal pattern responses.

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