A Novel Low Noise High Gain CMOS Instrumentation Amplifier for Biomedical Applications.
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| Title: | A Novel Low Noise High Gain CMOS Instrumentation Amplifier for Biomedical Applications. |
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| Authors: | Goel, Akshay1 akshayece0753@gmail.com, Singh, Gurmohan1 |
| Source: | International Journal of Electrical & Computer Engineering (2088-8708). Aug2013, Vol. 3 Issue 4, p516-523. 8p. |
| Subjects: | CMOS memory circuits, Biomedical signal processing, Instrumentation amplifier design & construction, Application software, Transistor noise, Electric network topology, Computer simulation |
| Abstract: | This work describes a novel technique of designing a low noise high gain CMOS instrumentation amplifier for biomedical applications. A three opamp instrumentation amplifier have been designed by employing two simple op-amps at the two inputs and a folded cascode op-amp at the output. Both input and output stage op-amps are 2-stage. Most of the earlier designed opamp in literature uses same type of op-amp at the input and output stages of instrumentation amplifier. By using folded cascode two stage op-amp at the output, we have achieved significant improvement in gain and CMRR. Transistors sizing plays a vital role in achieving high gain and CMRR. To achieve a desirable gain, common mode rejection ratio and other performance metrics, selection of most appropriate op-amp circuit topologies & optimum transistor sizing was the main criteria for design of instrumentation amplifier for biomedical applications. The instrumentation amplifier is simulated using Cadence Spectre tool and layout is designed in Cadence Layout editor at 0.18µm CMOS technology. Each of the input opamp provides a gain and CMRR of 45dB and 72dB respectively. The output stage folded cascode amplifier provides a gain of 82dB and a CMRR of 92dB. The design achieves an overall gain and CMRR of 67dB and 92db respectively. The designed instrumentation amplifier consumes only 263µW of power suitable for biomedical signal processing applications. [ABSTRACT FROM AUTHOR] |
| Copyright of International Journal of Electrical & Computer Engineering (2088-8708) is the property of Institute of Advanced Engineering & Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
| FullText | Links: – Type: pdflink Text: Availability: 0 |
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| Header | DbId: egs DbLabel: Engineering Source An: 119163863 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: A Novel Low Noise High Gain CMOS Instrumentation Amplifier for Biomedical Applications. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Goel%2C+Akshay%22">Goel, Akshay</searchLink><relatesTo>1</relatesTo><i> akshayece0753@gmail.com</i><br /><searchLink fieldCode="AR" term="%22Singh%2C+Gurmohan%22">Singh, Gurmohan</searchLink><relatesTo>1</relatesTo> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22International+Journal+of+Electrical+%26+Computer+Engineering+%282088-8708%29%22">International Journal of Electrical & Computer Engineering (2088-8708)</searchLink>. Aug2013, Vol. 3 Issue 4, p516-523. 8p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22CMOS+memory+circuits%22">CMOS memory circuits</searchLink><br /><searchLink fieldCode="DE" term="%22Biomedical+signal+processing%22">Biomedical signal processing</searchLink><br /><searchLink fieldCode="DE" term="%22Instrumentation+amplifier+design+%26+construction%22">Instrumentation amplifier design & construction</searchLink><br /><searchLink fieldCode="DE" term="%22Application+software%22">Application software</searchLink><br /><searchLink fieldCode="DE" term="%22Transistor+noise%22">Transistor noise</searchLink><br /><searchLink fieldCode="DE" term="%22Electric+network+topology%22">Electric network topology</searchLink><br /><searchLink fieldCode="DE" term="%22Computer+simulation%22">Computer simulation</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: This work describes a novel technique of designing a low noise high gain CMOS instrumentation amplifier for biomedical applications. A three opamp instrumentation amplifier have been designed by employing two simple op-amps at the two inputs and a folded cascode op-amp at the output. Both input and output stage op-amps are 2-stage. Most of the earlier designed opamp in literature uses same type of op-amp at the input and output stages of instrumentation amplifier. By using folded cascode two stage op-amp at the output, we have achieved significant improvement in gain and CMRR. Transistors sizing plays a vital role in achieving high gain and CMRR. To achieve a desirable gain, common mode rejection ratio and other performance metrics, selection of most appropriate op-amp circuit topologies & optimum transistor sizing was the main criteria for design of instrumentation amplifier for biomedical applications. The instrumentation amplifier is simulated using Cadence Spectre tool and layout is designed in Cadence Layout editor at 0.18µm CMOS technology. Each of the input opamp provides a gain and CMRR of 45dB and 72dB respectively. The output stage folded cascode amplifier provides a gain of 82dB and a CMRR of 92dB. The design achieves an overall gain and CMRR of 67dB and 92db respectively. The designed instrumentation amplifier consumes only 263µW of power suitable for biomedical signal processing applications. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of International Journal of Electrical & Computer Engineering (2088-8708) is the property of Institute of Advanced Engineering & Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.11591/ijece.v3i4.3170 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 8 StartPage: 516 Subjects: – SubjectFull: CMOS memory circuits Type: general – SubjectFull: Biomedical signal processing Type: general – SubjectFull: Instrumentation amplifier design & construction Type: general – SubjectFull: Application software Type: general – SubjectFull: Transistor noise Type: general – SubjectFull: Electric network topology Type: general – SubjectFull: Computer simulation Type: general Titles: – TitleFull: A Novel Low Noise High Gain CMOS Instrumentation Amplifier for Biomedical Applications. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Goel, Akshay – PersonEntity: Name: NameFull: Singh, Gurmohan IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 08 Text: Aug2013 Type: published Y: 2013 Identifiers: – Type: issn-print Value: 20888708 Numbering: – Type: volume Value: 3 – Type: issue Value: 4 Titles: – TitleFull: International Journal of Electrical & Computer Engineering (2088-8708) Type: main |
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