An Analog VLSI Model of Periodicity Extraction

Part of Advances in Neural Information Processing Systems 12 (NIPS 1999)

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André van Schaik


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This paper presents an electronic system the periodicity of a sound. It uses three analogue VLSI building blocks: a silicon cochlea, two inner-hair-cell circuits and two spiking neuron chips. The silicon cochlea consists of a cascade of filters. Because of the delay between two outputs from the silicon cochlea, spike trains created at these outputs are synchronous only for a narrow range of periodicities. In contrast to traditional band(cid:173) pass filters, where an increase in' selectivity has to be traded off against a decrease in response time, the proposed system responds quickly, independent of selectivity.