Cochlear models implemented with linearized transconductors

The aim of this work is the efficient implementation of linear continuous-time cochlear models such as that proposed by Liu (1992, 1993). The basic filter element, a transconductance-C integrator with no linearization, is evaluated in terms of dynamic range and power consumption. Linearized transconductors which employ source degeneration via single and multiple diffusers yield no net increase in current noise density, whereas linear range is improved eight and four times, respectively. Experimental results verify this improvement.