Permanent URL to this publication: http://dx.doi.org/10.5167/uzh-47169
Liu, S C; van Schaik, A; Minch, B A; Delbruck, T (2010). Event-based 64-channel binaural silicon cochlea with Q enhancement mechanisms. In: Circuits and Systems (ISCAS), Proceedings of 2010 IEEE International Symposium, Paris, France, 30 May 2010 - 2 June 2010, 2027-2030.
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This paper describes an event-based binaural silicon cochlea aimed at spatial audition and auditory scene analysis. The chip has a matched pair of 64-stage cascaded analog second-order filter banks with 512 pulse-frequency modulated (PFM) address-event representation (AER) outputs. The spectral selectivity is sharpened through 2 different on-chip methods: an on-chip local Q DAC and an on-chip spatial sharpening through nearest neighbour lateral inhibition. The fabricated chip in a 4-metal 2-poly 0.35um CMOS process consumes peak 25mW power for the digital circuits and 33mW for the analog core. Dynamic range to produce PFM output is 36dB (25mVpp to 1500mVpp at microphone preamp output). Event timing jitter is 2us for 250mVpp input. The peak output bandwidth is 10M events per second (eps) but typical speech scenarios show rates of 20keps.
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|Item Type:||Conference or Workshop Item (Paper), refereed, original work|
|Communities & Collections:||07 Faculty of Science > Institute of Neuroinformatics|
|DDC:||570 Life sciences; biology|
|Event End Date:||2 June 2010|
|Deposited On:||02 Mar 2011 14:51|
|Last Modified:||18 Oct 2012 00:48|
|Number of Pages:||3|
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