A Compact Low Power Bio-Signal Amplifier with Extended Linear Operation Range
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University of Akron / OhioLINK
2013
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| Online Access: | http://rave.ohiolink.edu/etdc/view?acc_num=akron1358074945 |
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ndltd-OhioLink-oai-etd.ohiolink.edu-akron13580749452021-08-03T05:19:44Z A Compact Low Power Bio-Signal Amplifier with Extended Linear Operation Range Hasan, Md. Naimul Electrical Engineering Bio-signal amplifier gain control linear output range low power small size THD This work presents a low power, small size bio-signal amplifier with extended linear operation range. The proposed scheme consists of an open loop rail-to-rail differential amplifier in the first stage and a closed loop amplifier in the second-stage that minimizes the gain reduction with output voltage level variation. Furthermore, an additional gain control feature compensates the gain degradation as the amplifier output level moves toward the supply rails. Voltage buffers are used in the first and second stages in a way that enables using smaller sized feedback resistors in the second stage. The amplifier performance is relatively insensitive to feedback resistor mismatch. In addition to providing an extended linear operation range, this approach reduces the area and power which is required for portable medical devices. The proposed amplifier is implemented using CMOS 0.35 ¿¿m technology with 3.3 V supply. The measurement results show a constant gain of 46 dB with linear operation range from 0.3 V to 3.08 V. The total harmonic distortion (THD) is 0.04% with power consumption of 18.5 ¿¿W and a core area of 0.063 mm^2. 2013-05-29 English text University of Akron / OhioLINK http://rave.ohiolink.edu/etdc/view?acc_num=akron1358074945 http://rave.ohiolink.edu/etdc/view?acc_num=akron1358074945 unrestricted This thesis or dissertation is protected by copyright: all rights reserved. It may not be copied or redistributed beyond the terms of applicable copyright laws. |
| collection |
NDLTD |
| language |
English |
| sources |
NDLTD |
| topic |
Electrical Engineering Bio-signal amplifier gain control linear output range low power small size THD |
| spellingShingle |
Electrical Engineering Bio-signal amplifier gain control linear output range low power small size THD Hasan, Md. Naimul A Compact Low Power Bio-Signal Amplifier with Extended Linear Operation Range |
| author |
Hasan, Md. Naimul |
| author_facet |
Hasan, Md. Naimul |
| author_sort |
Hasan, Md. Naimul |
| title |
A Compact Low Power Bio-Signal Amplifier with Extended Linear Operation Range |
| title_short |
A Compact Low Power Bio-Signal Amplifier with Extended Linear Operation Range |
| title_full |
A Compact Low Power Bio-Signal Amplifier with Extended Linear Operation Range |
| title_fullStr |
A Compact Low Power Bio-Signal Amplifier with Extended Linear Operation Range |
| title_full_unstemmed |
A Compact Low Power Bio-Signal Amplifier with Extended Linear Operation Range |
| title_sort |
compact low power bio-signal amplifier with extended linear operation range |
| publisher |
University of Akron / OhioLINK |
| publishDate |
2013 |
| url |
http://rave.ohiolink.edu/etdc/view?acc_num=akron1358074945 |
| work_keys_str_mv |
AT hasanmdnaimul acompactlowpowerbiosignalamplifierwithextendedlinearoperationrange AT hasanmdnaimul compactlowpowerbiosignalamplifierwithextendedlinearoperationrange |
| _version_ |
1719418140822077440 |