Departmental Papers (BE)

Document Type

Conference Paper

Date of this Version

May 2006

Comments

Copyright 2006 IEEE. Reprinted from Proceedings of the 2006 IEEE International Symposium on Circuits and Systems, (ISCAS 2006), May 2006, 4 pages.

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Abstract

We present a silicon neuron with a dynamic, active leak that enables precise spike-timing with respect to a time-varying input signal. Our neuron models the mammalian bushy cell, which enhances the phase-locking of its acoustically driven inputs. Our model enhances phase-locking by up to 38% (quantified by vector strength) across a 60 dB range of acoustic intensities, and up to 22% over a passive leak. Its conductance-based log-domain design yields a compact and efficient circuit, fabricated in 0.25 /spl mu/m CMOS, that is an ideal timing-enhancing component for neuromorphic speech recognition systems.

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Date Posted: 29 August 2007

This document has been peer reviewed.