Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/92040
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dc.contributor.authorAdrian, Victoren
dc.contributor.authorChang, Joseph Sylvesteren
dc.contributor.authorGwee, Bah Hweeen
dc.date.accessioned2010-05-04T08:13:19Zen
dc.date.accessioned2019-12-06T18:16:17Z-
dc.date.available2010-05-04T08:13:19Zen
dc.date.available2019-12-06T18:16:17Z-
dc.date.copyright2009en
dc.date.issued2009en
dc.identifier.citationAdrian, V., Chang, J. S., & Gwee, B. H. (2009). A low voltage micropower digital Class D amplifier modulator for hearing aids. IEEE Transactions on Circuits And Systems—II. 56(2), 337-349.en
dc.identifier.issn1549-8328en
dc.identifier.urihttps://hdl.handle.net/10356/92040-
dc.identifier.urihttp://hdl.handle.net/10220/6249en
dc.description.abstractWe present a micropower digital modulator for class-D amplifiers for power-critical digital hearing aids. The modulator design embodies a proposed Lagrange interpolation (a combined first- and second-order Lagrange) algorithmic pulsewidth modulation (PWM) and a third-order DeltaSigma noise shaper. By means of double-Fourier-series analysis, we analyze and determine the harmonic nonlinearities of the proposed algorithmic PWM. At 48-kHz sampling, 96-kHz PWM output, 997-Hz input, and input modulation index=0.9, the modulator circuit achieves a total harmonic distortion + noise (THD + N) of - 74dB (0.02%) over an 8-kHz voice bandwidth-12-dB THD + N improvement over a reported design and yet dissipates only ~ 50% of the power. The proposed modulator dissipates the lowest power dissipation of all modulators compared, and by means of a proposed figure of merit, the proposed modulator exhibits very competitive performance. The modulator IC is fabricated in a 0.35-mum digital CMOS process with a core area of 0.46 mm2.en
dc.format.extent13 p.en
dc.language.isoenen
dc.relation.ispartofseriesIEEE transactions on circuits and systems—IIen
dc.rights© 2009 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE. This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. In most cases, these works may not be reposted without the explicit permission of the copyright holder. http://www.ieee.org/portal/site This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. In most cases, these works may not be reposted without the explicit permission of the copyright holder.en
dc.subjectDRNTU::Engineering::Electrical and electronic engineeringen
dc.titleA low voltage micropower digital Class D amplifier modulator for hearing aidsen
dc.typeJournal Articleen
dc.contributor.schoolSchool of Electrical and Electronic Engineeringen
dc.identifier.doi10.1109/TCSI.2008.2001831en
dc.description.versionPublished versionen
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