# Analog Implementations of Auditory Models

@inproceedings{Lyon1991AnalogIO,
title={Analog Implementations of Auditory Models},
author={Richard F. Lyon},
booktitle={HLT},
year={1991}
}
• R. Lyon
• Published in HLT 19 February 1991
• Computer Science
The challenge of making cost-effective implementations of auditory models has led us to pursue an analog VLSI micro-power approach. Experiments with the first few generations of analog cochlea chips showed some of both the potential and the problems of this approach. The inherent exponential behavior of MOS transistors in the subthreshold or weak-inversion region leads to nonlinear filter circuits, in which the small-signal and large-signal behaviors can be quite different. Early problems with…
Improved implementation of the silicon cochlea
• Engineering
• 1992
The original 'Analog electronic cochlea' of R.F. Lyon and C.A. Mead (Trans. Acoust., Speech, Signal Processing, vol.36, no.7, p.1119-34, 1988) used a cascade of second-order filter sections in
Analog very large-scale integrated (VLSI) implementation of a model of amplitude-modulation sensitivity in the auditory brainstem.
• Computer Science, Medicine
The Journal of the Acoustical Society of America
• 1999
The implementation is based on a model of amplitude-modulation sensitivity in the central nucleus of the inferior colliculus (CNIC) previously described by Hewitt and Meddis and demonstrates the feasibility of using analog VLSI to build and test auditory models that use large numbers of component neurons.
CCD correlators for auditory models
• R. Lyon
• Engineering
[1991] Conference Record of the Twenty-Fifth Asilomar Conference on Signals, Systems & Computers
• 1991
Surface-channel charge-coupled devices (CCDs) provide a mechanism for analog signal delay that can be built using an ordinary double-poly CMOS digital process, such as offered by Orbit through MOSIS.
Analogue VLSI implementations of two dimensional, nonlinear, active cochlea models
• Computer Science
2008 IEEE Biomedical Circuits and Systems Conference
• 2008
This paper presents results from integrated circuit (IC) implementations of the active, nonlinear, two dimensional (2D) silicon cochlea, and provides the foundations for a silicon coChlea that can be used to better understand the biological co chlea as well as explore higher auditory centres.
A Biomimetic, 4.5 $\mu$W, 120+ dB, Log-Domain Cochlea Channel With AGC
• Engineering, Computer Science
IEEE Journal of Solid-State Circuits
• 2009
The design and performance evaluation of a new analog CMOS cochlea channel of increased biorealism that implements a recently proposed transfer function, namely the One-Zero Gammatone filter (or OZGF), and a new low-power automatic gain control circuit that adapts the gain of the channel according to the input signal strength, thereby extending significantly its input dynamic range.
Analogue CMOS Cochlea Systems: A Historic Retrospective
• 2011
For more than twenty-five years, the bionics community (and particularly the VLSI engineering community) has been performing extensive research to understand, model and design in silicon the
Silicon Models of the Auditory Pathway
• Computer Science
• 2010
While neuromorphic engineers extensively develop and use computer models of neural systems, which are generally less expensive and faster to create, the main goal is to implement the models in electronic hardware to allow models to interact with the world in real time.
A Decimated Electronic Cochlea on a Reconfigurable Platform
Electronic cochlea models are used for physiological modeling as well as in many signal processing tasks such as pitch detection and speech recognition. Hardware based electronic cochlea systems
An FPGA-Based Electronic Cochlea
• Computer Science
• 2003
A module generator which can produce an FPGA-based implementation of an electronic cochlea filter with arbitrary precision is presented and can be used as an accelerator for research in audition or as the front-end for embedded auditory signal processing systems.
A Low-Power Wide-Linear-Range Transconductance Amplifier
• Engineering
• 1997
The linear range of approximately ±75mV of traditional subthreshold transconductance amplifiers istoo small for certain applications—for example, for filtersin electronic cochleas, where it is

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