This paper presents a design methodology for high-order class-D amplifiers, which covers the entire design flow, from specifications to component sizing. The methodology is validated with three design examples, namely a second-order, a third-order, and a fourth-order class-D amplifier. Moreover, the third-order class-D amplifier has been integrated on silicon and characterized, further confirming the validity of the whole design flow. The achieved results demonstrate that high-order class-D amplifiers can achieve Total-Harmonic-Distortion (THD) performance compatible with the specifications of high-end audio applications (THD approximate to 90 dB), which would be unfeasible with conventional first-order class-D amplifiers
Cartasegna, D., Malcovati, P., Crespi, L., Lee, K., Baschirotto, A. (2013). Design of high-order class-D audio amplifiers. In Proceedings of 2013 International Conference on IC Design & Technology (ICICDT 2013) (pp.151-154). IEEE [10.1109/ICICDT.2013.6563325].
Design of high-order class-D audio amplifiers
BASCHIROTTO, ANDREA
2013
Abstract
This paper presents a design methodology for high-order class-D amplifiers, which covers the entire design flow, from specifications to component sizing. The methodology is validated with three design examples, namely a second-order, a third-order, and a fourth-order class-D amplifier. Moreover, the third-order class-D amplifier has been integrated on silicon and characterized, further confirming the validity of the whole design flow. The achieved results demonstrate that high-order class-D amplifiers can achieve Total-Harmonic-Distortion (THD) performance compatible with the specifications of high-end audio applications (THD approximate to 90 dB), which would be unfeasible with conventional first-order class-D amplifiers
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