A bio-inspired active radio-frequency silicon cochlea
Fast wideband spectrum analysis is expensive in power and hardware resources. We show that the spectrum-analysis architecture used by the biological cochlea is extremely efficient: analysis time, power and hardware usage all scale linearly with N, the number of output frequency bins, versus N log(N)...
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| Format: | Article |
| Language: | en_US |
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Institute of Electrical and Electronics Engineers
2010
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| Online Access: | http://hdl.handle.net/1721.1/59982 https://orcid.org/0000-0003-0384-3786 |
| _version_ | 1826196544518356992 |
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| author | Mandal, Soumyajit Zhak, Serhii M. Sarpeshkar, Rahul |
| author2 | Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science |
| author_facet | Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science Mandal, Soumyajit Zhak, Serhii M. Sarpeshkar, Rahul |
| author_sort | Mandal, Soumyajit |
| collection | MIT |
| description | Fast wideband spectrum analysis is expensive in power and hardware resources. We show that the spectrum-analysis architecture used by the biological cochlea is extremely efficient: analysis time, power and hardware usage all scale linearly with N, the number of output frequency bins, versus N log(N) for the Fast Fourier Transform. We also demonstrate two on-chip radio frequency (RF) spectrum analyzers inspired by the cochlea. They use exponentially-tapered transmission lines or filter cascades to model cochlear operation: Inductors map to fluid mass, capacitors to membrane stiffness and active elements (transistors) to active outer hair cell feedback mechanisms. Our RF cochlea chips, implemented in a 0.13 mum CMOS process, are 3 mm times 1.5 mm in size, have 50 exponentially-spaced output channels, have 70 dB of dynamic range, consume <300 mW of power and analyze the radio spectrum from 600 MHz to 8 GHz. Our work, which delivers insight into the efficiency of analog computation in the ear, may be useful in the front ends of ultra-wideband radio systems for fast, power-efficient spectral decomposition and analysis. Our novel rational cochlear transfer functions with zeros also enable improved audio silicon cochlea designs with sharper rolloff slopes and lower group delay than prior all-pole versions. |
| first_indexed | 2024-09-23T10:28:43Z |
| format | Article |
| id | mit-1721.1/59982 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T10:28:43Z |
| publishDate | 2010 |
| publisher | Institute of Electrical and Electronics Engineers |
| record_format | dspace |
| spelling | mit-1721.1/599822022-09-30T21:22:58Z A bio-inspired active radio-frequency silicon cochlea Mandal, Soumyajit Zhak, Serhii M. Sarpeshkar, Rahul Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science Massachusetts Institute of Technology. Research Laboratory of Electronics Sarpeshkar, Rahul Sarpeshkar, Rahul Zhak, Serhii M. Mandal, Soumyajit Fast wideband spectrum analysis is expensive in power and hardware resources. We show that the spectrum-analysis architecture used by the biological cochlea is extremely efficient: analysis time, power and hardware usage all scale linearly with N, the number of output frequency bins, versus N log(N) for the Fast Fourier Transform. We also demonstrate two on-chip radio frequency (RF) spectrum analyzers inspired by the cochlea. They use exponentially-tapered transmission lines or filter cascades to model cochlear operation: Inductors map to fluid mass, capacitors to membrane stiffness and active elements (transistors) to active outer hair cell feedback mechanisms. Our RF cochlea chips, implemented in a 0.13 mum CMOS process, are 3 mm times 1.5 mm in size, have 50 exponentially-spaced output channels, have 70 dB of dynamic range, consume <300 mW of power and analyze the radio spectrum from 600 MHz to 8 GHz. Our work, which delivers insight into the efficiency of analog computation in the ear, may be useful in the front ends of ultra-wideband radio systems for fast, power-efficient spectral decomposition and analysis. Our novel rational cochlear transfer functions with zeros also enable improved audio silicon cochlea designs with sharper rolloff slopes and lower group delay than prior all-pole versions. Massachusetts Institute of Technology. Poitras Pre-Doctoral Fellowship 2010-11-12T20:19:50Z 2010-11-12T20:19:50Z 2009-06 2009-05 Article http://purl.org/eprint/type/JournalArticle 0018-9200 INSPEC Accession Number: 10667205 http://hdl.handle.net/1721.1/59982 Mandal, S., S.M. Zhak, and R. Sarpeshkar. “A Bio-Inspired Active Radio-Frequency Silicon Cochlea.” Solid-State Circuits, IEEE Journal of 44.6 (2009): 1814-1828. © 2009 IEEE. https://orcid.org/0000-0003-0384-3786 en_US http://dx.doi.org/10.1109/JSSC.2009.2020465 IEEE Journal of Solid-State Circuits Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. application/pdf Institute of Electrical and Electronics Engineers IEEE |
| spellingShingle | Mandal, Soumyajit Zhak, Serhii M. Sarpeshkar, Rahul A bio-inspired active radio-frequency silicon cochlea |
| title | A bio-inspired active radio-frequency silicon cochlea |
| title_full | A bio-inspired active radio-frequency silicon cochlea |
| title_fullStr | A bio-inspired active radio-frequency silicon cochlea |
| title_full_unstemmed | A bio-inspired active radio-frequency silicon cochlea |
| title_short | A bio-inspired active radio-frequency silicon cochlea |
| title_sort | bio inspired active radio frequency silicon cochlea |
| url | http://hdl.handle.net/1721.1/59982 https://orcid.org/0000-0003-0384-3786 |
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