{"id":{"repo_id":"ohiolink","oai_identifier":"oai:etd.ohiolink.edu:akron1358074945"},"canonical_url":"https://search.dev.ndltd.org/etd/ohiolink/oai:etd.ohiolink.edu:akron1358074945","repository":{"repo_id":"ohiolink","name":"OhioLINK","base_url":"https://etd.ohiolink.edu/acprod/odb_etd/ws/oai/oai"},"display":{"title":"A Compact Low Power Bio-Signal Amplifier with Extended Linear Operation Range","abstract":"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.","abstract_html":"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.","abstract_has_math":false,"creators":["Hasan, Md. Naimul"],"institution":"University of Akron","degree_name":"Master of Science","degree_level":"masters","degree_discipline":"Electrical Engineering","degree_department":null,"school":null,"contributors":["Lee, Kye-Shin"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2013,"date_issued":"2013-05-29","date_published":"2013-05-29","updated_at":"2026-07-24T03:35:52Z","subjects":["Electrical Engineering","Bio-signal amplifier","gain control","linear output range","low power","small size","THD"],"languages":["English"],"rights":["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."],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"http://rave.ohiolink.edu/etdc/view?acc_num=akron1358074945","outbound_label":"Repository record","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Lee, Kye-Shin"]},{"key":"dc:creator","label":"Author","values":["Hasan, Md. Naimul"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2013-05-29"]},{"key":"dc:publisher","label":"Institution","values":["University of Akron / OhioLINK"]},{"key":"dc:type","label":"Dc Type","values":["Electronic Thesis or Dissertation"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Electrical Engineering"]},{"key":"thesis:degree_level","label":"Degree Level","values":["masters"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Master of Science"]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["University of Akron"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Electrical Engineering","Bio-signal amplifier","gain control","linear output range","low power","small size","THD"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["English"]},{"key":"dc:rights","label":"Dc Rights","values":["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."]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["http://rave.ohiolink.edu/etdc/view?acc_num=akron1358074945"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["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."]},{"key":"dc:format","label":"Dc Format","values":["application/pdf","p.56","5.23 MB"]},{"key":"dc:title","label":"Title","values":["A Compact Low Power Bio-Signal Amplifier with Extended Linear Operation Range"]}]}],"canonical_facts":{"dc:contributor":["Lee, Kye-Shin"],"dc:creator":["Hasan, Md. Naimul"],"dc:date":["2013-05-29"],"dc:description":["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."],"dc:format":["application/pdf","p.56","5.23 MB"],"dc:identifier":["http://rave.ohiolink.edu/etdc/view?acc_num=akron1358074945"],"dc:language":["English"],"dc:publisher":["University of Akron / OhioLINK"],"dc:rights":["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."],"dc:subject":["Electrical Engineering","Bio-signal amplifier","gain control","linear output range","low power","small size","THD"],"dc:title":["A Compact Low Power Bio-Signal Amplifier with Extended Linear Operation Range"],"dc:type":["Electronic Thesis or Dissertation"],"thesis:degree_discipline":["Electrical Engineering"],"thesis:degree_level":["masters"],"thesis:degree_name":["Master of Science"],"thesis:institution_name":["University of Akron"]},"updated_at":"2026-07-24T03:35:52Z"}