Title :
Design of high-order class-D audio amplifiers
Author :
Cartasegna, D. ; Malcovati, Piero ; Crespi, Luca ; Lee, Kahyun ; Baschirotto, A.
Author_Institution :
Conexant Syst., Newport Beach, CA, USA
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 ≈ 90 dB), which would be unfeasible with conventional first-order class-D amplifiers.
Keywords :
audio-frequency amplifiers; elemental semiconductors; harmonic distortion; silicon; THD performance; design flow; fourth-order class-D amplifier; high-end audio application; high-order class-D audio amplifier design; second-order class-D amplifier; silicon; third-order class-D amplifier; total harmonic distortion performance; Bridge circuits; Circuit stability; Design methodology; Frequency modulation; Gain; Pulse width modulation;
Conference_Titel :
IC Design & Technology (ICICDT), 2013 International Conference on
Conference_Location :
Pavia
Print_ISBN :
978-1-4673-4740-2
Electronic_ISBN :
978-1-4673-4741-9
DOI :
10.1109/ICICDT.2013.6563325