Title :
Cochlear models implemented with linearized transconductors
Author :
Furth, Paul M. ; Andreou, Andreas G.
Author_Institution :
Klipsch Sch. of Electr. & Comput. Eng., New Mexico State Univ., Las Cruces, NM, USA
Abstract :
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
Keywords :
CMOS analogue integrated circuits; analogue processing circuits; continuous time filters; ear; hearing; hearing aids; integrating circuits; physiological models; cochlea; cochlear models; current noise density; dynamic range; linear continuous-time models; linearized transconductors; multiple diffusers; power consumption; single diffusers; source degeneration; transconductance-C integrator; Analog circuits; CMOS analog integrated circuits; CMOS process; Filter bank; MOS devices; Mirrors; Semiconductor device modeling; Transconductance; Transconductors; Voltage;
Conference_Titel :
Circuits and Systems, 1996. ISCAS '96., Connecting the World., 1996 IEEE International Symposium on
Conference_Location :
Atlanta, GA
Print_ISBN :
0-7803-3073-0
DOI :
10.1109/ISCAS.1996.541640