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Published 1999 | Published
Book Section - Chapter Open

A Bidirectional Analog VLSI Cochlear Model


A novel circuit is presented for implementing a bidirectional passive cochlear model in analog VLSI. The circuit includes a subcircuit for modelling the fluid in the cochlear duct, and a subcircuit for modelling the passive basilar membrane. The circuit is compared to the classical 1-D transmission line cochlear model and found to be equivalent. The approach leads to an unexpected fa.ult tolerance in the form of insensitivity to transconductance amplifier offset voltages. A 545-stage cochlea has been fabricated and demonstrates the expected wave propagation behaviour.

Additional Information

© 1991 MIT Press. The authors are pleased to acknowledge many helpful discussions with Xavier Arreguit, John Lazzaro, and Massimo Sivilotti. This work was sponsored by the Office of Naval Research and the System Development Foundation. Chip fabrication was provided by the Defense Advanced Research Projects Agency and the MOSIS Service.

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