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dc.contributor.authorYu, Junen
dc.contributor.authorTan, Meng Tongen
dc.contributor.authorGoh, Wang Lingen
dc.contributor.authorCox, Stephen Michaelen
dc.identifier.citationYu, J., Tan, M. T., Goh, W. L., & Cox, S. M. (2011). A dual-feedforward carrier-modulated second-order class-D amplifier with improved THD. IEEE transactions on circuits and systems II : express briefs, 59(1), 35 - 39.en
dc.description.abstractThe advancement of power MOSFET fabrication technology has aided the reduction of power stage errors in class-D amplifiers (amps). This reduction reveals intrinsic distortion, which is a key performance limiter in modern pulsewidth-modulation (PWM)-based class-D amps. In this brief, a dual-feedforward carrier modulation topology is proposed to reduce the intrinsic harmonic distortion of a second-order loop filter class-D amp. The proposed design achieves a total harmonic distortion of less than 0.01% for input frequency up to 6 kHz, and it has an idle carrier frequency of 310 kHz. Such low carrier frequency is particularly important in high-power devices as it guarantees low switching loss. Moreover, the carrier frequency varies in a narrow range in the presence of an input signal and helps to suppress the audible intermodulation distortion in multichannel applications. The prototype circuit is implemented and tested on a printed circuit board using discrete components.en
dc.relation.ispartofseriesIEEE transactions on circuits and systems II : express briefsen
dc.rights© 2011 IEEE.en
dc.subjectDRNTU::Engineering::Electrical and electronic engineeringen
dc.titleA dual-feedforward carrier-modulated second-order class-D amplifier with improved THDen
dc.typeJournal Articleen
dc.contributor.schoolSchool of Electrical and Electronic Engineeringen
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