Departmental Papers (BE)

Document Type

Conference Paper

Date of this Version

May 2006


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.


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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Date Posted: 29 August 2007

This document has been peer reviewed.