Title :
Improved implementation of the silicon cochlea
Author :
Watts, Lloyd ; Kerns, Douglas A. ; Lyon, Richard F. ; Mead, Carver A.
Author_Institution :
Dept. of Electr. Eng., California Inst. of Technol., Pasadena, CA, USA
fDate :
5/1/1992 12:00:00 AM
Abstract :
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 subthreshold analog VLSI to implement a low-power, real-time model of early auditory processing. Experience with many silicon-cochlea chips has allowed the identification of a number of important design issues, namely dynamic range, stability, device mismatch, and compactness. In this, paper, the original design is discussed in light of these issues, and circuit and layout techniques are described which significantly improve its performance, robustness, and efficiency. Measurements from test chips verify the improved performance
Keywords :
CMOS integrated circuits; VLSI; acoustic signal processing; active filters; biomedical electronics; ear; elemental semiconductors; hearing; linear integrated circuits; physiological models; signal processing equipment; silicon; Analog electronic cochlea; Si cochlea chips; auditory processing; compactness; device mismatch; dynamic range; layout techniques; low-power; monolithic IC; real-time model; second-order filter sections; stability; subthreshold analog VLSI; Circuit stability; Circuit testing; Dynamic range; Filters; Robustness; Semiconductor device measurement; Signal processing; Silicon; Speech processing; Very large scale integration;
Journal_Title :
Solid-State Circuits, IEEE Journal of
