Name
Title | ||
|---|---|---|
A Bio-Realistic Analog CMOS Cochlea Filter With High Tunability and Ultra-Steep Roll-Off. |
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 is 9(th) order, consumes 59.5 ∼ 90.0 μW power and occupies 0.9 mm(2) chip 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. |
Year | DOI | Venue |
|---|---|---|
2015 | 10.1109/TBCAS.2014.2328321 | IEEE Trans. Biomed. Circuits and Systems |
Keywords | DocType | Volume |
cochlea filter ultra steep roll-off,bio-inspired materials,proposed filter parallel bank,power 59.50 muw to 90.00 muw,biasing current,actively tunable cochlea filter response,cochlea filter subfilter stage-provided passive response,low-frequency passive response,cochlea filter chip area,cochlear implants,frequency 31.00 hz to 8.00 hz,analog cochlea filter,cmos cochlea filter,auditory filter,fabricated chip,pass-band frequency,pass-to-stop band transition frequency,biorealistic cochlea filter,hearing,floating active inductor,speech processor device front-end,gain tuning,circuit parameter adjustment,bioinspired auditory system,analog very-large-scale-integration,cochlea filter-provided passive response,bio-inspired circuits,high cochlea filter tunability,stop-band frequency,cochlea filter biorealistic behavior,cochlea filter power consumption,tunable response midband frequency,q factor tuning,cmos integrated circuits,mammalian cochlea response,cochlea filter experimental result,specialized subfilter stage-provided passive response,transition frequency ultra steep roll-off,complementary metal oxide semiconductor cochlea filter,cochlea filter design,subfilter implementation,hearing prosthesis device front-end,ninth-order filter,biorealistic center frequency shift,balanced ladder topology,cmos cochlea,gain 20.00 db,band-stop filters,gain 300.00 db,analog vlsi,cochlea filter configuration,band-pass filters,wide midband tuning range,physiologically-measured cochlea response | Journal | 9 |
Issue | ISSN | Citations |
3 | 1940-9990 | 8 |
PageRank | References | Authors |
0.71 | 21 | 5 |
Name | Order | Citations | PageRank |
|---|---|---|---|
| Shiwei Wang | 1 | 36 | 5.05 |
| Thomas Jacob Koickal | 2 | 44 | 6.55 |
| Alister Hamilton | 3 | 117 | 19.02 |
| Rebecca Cheung | 4 | 14 | 2.61 |
| Leslie S. Smith | 5 | 363 | 40.34 |