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This chapter deals with the design and performance evaluation of a new analogue CMOS cochlea channel of increased biorealism. The design implements a recently proposed transfer function [12], namely the One-Zero Gammatone Filter (or OZGF), which provides a robust foundation for modeling a variety of auditory data such as realistic passband asymmetry, linear low-frequency tail, and level-dependent gain. Moreover, the OZGF is attractive because it can be implemented efficiently in any technological medium – analogue or digital – using standard building blocks. The channel was synthesized using novel, low-power, Class-AB, log-domain, biquadratic filters employing MOS transistors operating in their weak inversion regime. Furthermore, the chapter details the design of a new low-power automatic gain-control circuit that adapts the gain of the channel according to the input signal strength, thereby...
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Katsiamis, A.G., Drakakis, E.M., Lyon, R.F. (2012). Bio-inspired CMOS Cochlea. In: Bhushan, B. (eds) Encyclopedia of Nanotechnology. Springer, Dordrecht. https://doi.org/10.1007/978-90-481-9751-4_186
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DOI: https://doi.org/10.1007/978-90-481-9751-4_186
Publisher Name: Springer, Dordrecht
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