An Analogue VLSI Implementation of the Meddis Inner Hair Cell Model Using Log-Domain Filters

Abstract

An improved analogue VLSI implementation of the inner hair cell is presented. The Meddis inner hair cell model is a widely accepted, computationally convenient computer model. We transfer this model into the current-domain and implement it using translinear and log-domain circuits. The function of the transformed model and circuit are tested against physiological data and the Meddis model. These tests include (a) rate intensity functions for onset and steady state response; (d) recovery of spontaneous activity; and (c) Low-frequency selectivity. Our circuit mimics the Meddis model in these tests, and is flexible enough to be ‘tuned’ to behave in a similar way to the Meddis model and to the biological inner hair cell