Title :
A circuit model of hair-cell transduction for temporal processing and auditory feature extraction
Author :
Kumar, Nagendra ; Cauwenberghs, Gert ; Andreou, Andreas G.
Author_Institution :
Dept. of Electr. & Comput. Eng., Johns Hopkins Univ., Baltimore, MD, USA
Abstract :
We present a novel low-power circuit for level crossing interval measurements on continuous-time auditory signals, as obtained from the outputs of an analog cochlear filter bank. The circuit achieves immediate response for a given signal in the audio frequency range. Experimental results from a fabricated array of 9 level crossing transducers demonstrate frequency-to-voltage conversion over a range covering the audio band, with less than 120 μW of power dissipated per cell from a 5 V supply
Keywords :
biomedical electronics; ear; feature extraction; medical signal processing; physiological models; voltage-frequency convertors; 120 muW; 5 V; analog cochlear filter bank; circuit model; continuous-time auditory signal; feature extraction; frequency-to-voltage conversion; hair-cell transduction; interval measurement; level crossing; low-power circuit; temporal processing; Capacitors; Feature extraction; Frequency; Integrated circuit measurements; Noise measurement; Signal processing; Signal resolution; Time measurement; Very large scale integration; 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.1996.541593
