John G. Elias

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The use of switched capacitors as wide-range, programmable resistive elements in spatially extensive artificial dendritic trees (ADT's) is described. We show that silicon neuro-morphs with ADT's 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(More)
The naturalnessand variety of a touch-based hand gesture interface offers new opportunities for human-computer interaction.Using a new type of capacitive sensor array,a Multi-Touch Surface (MTS) can be created that is not limited in size, that can be presented in many configurations, that is robust under a variety of environmental operating conditions, and(More)
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(More)
A dendritic tree, as part of a silicon neuromorph, was modeled in VLSI as a multibranched, passive cable structure with multiple synaptic sites that either depolarize or hyperpolarize local "membrane patches," thereby raising or lowering the probability of spike generation of an integrate-and-fire "soma." As expected from previous theoretical analyses,(More)
Our VLSI neuromorphs, possess extensive dendritic trees with hundreds of excitatory and inhibitory synaptic sites. Useful signal processing can be achieved by evolving the appropriate connections to the synapses using genetic algorithms. In order to reduce the very large solution space, schemes for specifying connections have been borrowed from neural(More)
This document describes a network architecture called Highball and a preliminary design for a prototype, wide-area data network designed to operate at speeds of 1 Gbps and beyond. It is intended for applications requiring high speed burst transmissions where some latency between requesting a transmission and granting the request can be anticipated and(More)
I certify that I have read this dissertation and that in my opinion it meets the academic and professional standard required by the University as a dissertation for the degree of Doctor of Philosophy. Professor in charge of dissertation I certify that I have read this dissertation and that in my opinion it meets the academic and professional standard(More)