Please use this identifier to cite or link to this item: http://hdl.handle.net/1893/21850
Appears in Collections:Computing Science and Mathematics Journal Articles
Peer Review Status: Refereed
Title: A Bio-Realistic Analog CMOS Cochlea Filter With High Tunability and Ultra-Steep Roll-Off
Author(s): Wang, Shiwei
Koickal, Thomas Jacob
Hamilton, Alister
Cheung, Rebecca
Smith, Leslie
Keywords: Analog VLSI
CMOS cochlea
auditory filter
bio-inspired circuits
floating active inductor
Issue Date: Jun-2015
Citation: Wang S, Koickal TJ, Hamilton A, Cheung R & Smith L (2015) A Bio-Realistic Analog CMOS Cochlea Filter With High Tunability and Ultra-Steep Roll-Off. IEEE Transactions on Biomedical Circuits and Systems, 9 (3), pp. 297-311. https://doi.org/10.1109/TBCAS.2014.2328321.
A multichannel adaptive integrated MEMS/CMOS microphone.
EP/G062609/1
Abstract: This paper presents the design and experimental results of a cochlea filter in analog very large scale integration (VLSI) which highly resembles physiologically measured response of the mammalian cochlea. The filter consists of three specialized sub-filter stages which respectively provide passive response in low frequencies, actively tunable response in mid-band frequencies and ultra-steep roll-off at transition frequencies from pass-band to stop-band. The sub-filters are implemented in balanced ladder topology using floating active inductors. Measured results from the fabricated chip show that wide range of mid-band tuning including gain tuning of over 20dB, Q factor tuning from 2 to 19 as well as the bio-realistic center frequency shift are achieved by adjusting only one circuit parameter. Besides, the filter has an ultra-steep roll-off reaching over 300 dB/dec. By changing biasing currents, the filter can be configured to operate with center frequencies from 31 Hz to 8 kHz. The filter isorder, consumespower and occupieschip area. A parallel bank of the proposed filter can be used as the front-end in hearing prosthesis devices, speech processors as well as other bio-inspired auditory systems owing to its bio-realistic behavior, low power consumption and small size.
DOI Link: 10.1109/TBCAS.2014.2328321
Rights: This work is licensed under a Creative Commons Attribution 3.0 License. For more information, see http://creativecommons.org/licenses/by/3.0/

Files in This Item:
File Description SizeFormat 
06869048.pdfFulltext - Published Version; : Publisher's web version4.49 MBAdobe PDFView/Open



This item is protected by original copyright



Items in the Repository are protected by copyright, with all rights reserved, unless otherwise indicated.

If you believe that any material held in STORRE infringes copyright, please contact library@stir.ac.uk providing details and we will remove the Work from public display in STORRE and investigate your claim.