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A practical micropower programmable bandpass filter for use in bionic ears
| Content Provider | Semantic Scholar |
|---|---|
| Author | Salthouse, Christopher D. Sarpeshkar, Rahul |
| Copyright Year | 2003 |
| Abstract | Subthreshold Gm-C filters offer the low power and wide tunable range required for use in fully implantable bionic ears. The major design challenge that must be met is increasing the linear range. A capacitive-attenuation technique is presented and refined to allow the construction of wide-linear-range bandpass filters with greater than 1 V/sub pp/ swings. For a 100-200 Hz fully differential filter with second-order roll off slopes and greater than 60 dB dynamic range, experimental results from a 1.5-/spl mu/m, 2.8-V BiCMOS chip yield only 0.23 /spl mu/W power consumption; for a 5-10 kHz filter with the same specifications the power only increased to 6.36 /spl mu/W. Fully differential filters with first-order slopes had a dynamic range of 66 dB and power consumptions of 0.12 and 3.36 /spl mu/W in the 100-200 Hz and 5-10 kHz cases, respectively. We show that our experimental results of noise and linear range are in good accord with theoretical estimates of these quantities. |
| Starting Page | 63 |
| Ending Page | 70 |
| Page Count | 8 |
| File Format | PDF HTM / HTML |
| DOI | 10.1109/JSSC.2002.806286 |
| Volume Number | 38 |
| Alternate Webpage(s) | http://www.rle.mit.edu/acbs/pdfpublications/journal_papers/journal_06.pdf |
| Alternate Webpage(s) | https://doi.org/10.1109/JSSC.2002.806286 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
