Massimo Sivilotti

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Several research groups are implementing analog integrated circuit models of biological auditory processing. The outputs of these circuit models have taken several forms, including video format for monitor display, simple scanned output for oscilloscope display, and parallel analog outputs suitable for data-acquisition systems. Here, an alternative output(More)
This thesis develops a theoretical model for the wiring complexity of wide classes of systems, relating the degree of connectivity of a circuit to the dimensionality of its interconnect technology. This model is used to design an efficient, hierarchical interconnection network capable of accommodating large classes of circuits. Predesigned circuit elements(More)
A radically new type of associative memory, the ASSOCMEM, has been implemented in VLSI and tested. Analog circuit techniques are used to construct a network that evolves towards fully restored (digital) fixed-points that are the memories of the system. Association occurs on the whole source word, each bit of which may assume a continuous analog value. The(More)
Integration of photosensors and processing elements provides a mechanism to concurrently perform computations previously intractable in real-time. We have used this approach to model biological early vision processes. A set of VLSI "retina" chips have been fabricated, using large scale analog circuits (over lOOK transistors in total). Analog processing(More)
We describe two successfully working, analog VLSI vision circuits that move beyond pixel-based early vision algorithms. One circuit, implementing the dynamic wires model, provides for dedicated lines of communication among groups of pixels that share a common property. The chip uses the dynamic wires model to compute the arclength of visual contours.(More)
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