Title :
An ultrasonic filterbank with spiking neurons
Author :
Abdalla, Hisham ; Horiuchi, Timothy K.
Author_Institution :
Dept. of Electr. & Comput. Eng., Maryland Univ., College Park, MD, USA
Abstract :
To support our ongoing work in modeling bat echolocation, a binaural, ultrasonic cochlea-like filter bank has been designed with moderate quality (Q) factor (as high as 65) with spiking neurons that are driven by the filter outputs. The neuron addresses are reported off chip at the time of the spike in an unarbitrated fashion and in current-mode to reduce the amount of capacitively-coupled feedback into the filters. This chip was fabricated in a commercially-available 0.5 μm CMOS process and consumes 0.425 milliwatts at 5 volts.
Keywords :
CMOS analogue integrated circuits; Q-factor; acoustic signal processing; bioacoustics; channel bank filters; current-mode circuits; integrated circuit design; mechanoception; 0.425 mW; 0.5 micron; 5 V; CMOS process; bat echolocation modeling; binaural filter bank; capacitively-coupled feedback; cochlea-like filter bank; current-mode; moderate Q-factor; moderate quality factor; spiking neurons; ultrasonic filterbank; Band pass filters; Biological system modeling; Current measurement; Filter bank; Filtering; Frequency measurement; Gain measurement; Neurons; Q measurement; Tuning;
Conference_Titel :
Circuits and Systems, 2005. ISCAS 2005. IEEE International Symposium on
Print_ISBN :
0-7803-8834-8
DOI :
10.1109/ISCAS.2005.1465557