Title :
A 0.18-µm CMOS, −92-dB THD, 105-dBA DR, third-order audio class-D amplifier
Author :
Cartasegna, D. ; Malcovati, Piero ; Crespi, Luca ; Baschirotto, A.
Author_Institution :
Conexant Syst., Newport Beach, CA, USA
Abstract :
This paper presents a third-order audio class-D amplifier, implemented in a 0.18-μm CMOS technology, achieving -92 dB of total harmonic distortion (THD) and 105 dBA of dynamic range (DR) with a quiescent current of 2 mA. The circuit delivers up to 2.4 W on a 4-Ω load with a peak efficiency of 88%. The THD performance, achieved thanks to the third-order loop filter, makes the proposed device suitable for high-end audio applications, where linear amplifiers are still the dominant solution.
Keywords :
CMOS analogue integrated circuits; audio-frequency amplifiers; harmonic distortion; CMOS technology; current 2 mA; dynamic range; efficiency 88 percent; high-end audio applications; linear amplifiers; quiescent current; resistance 4 ohm; size 0.18 mum; third-order audio class-D amplifier; third-order loop filter; total harmonic distortion; Bridge circuits; CMOS integrated circuits; CMOS technology; Gain; Generators; Pulse width modulation; Transient analysis;
Conference_Titel :
ESSCIRC (ESSCIRC), 2013 Proceedings of the
Conference_Location :
Bucharest
Print_ISBN :
978-1-4799-0643-7
DOI :
10.1109/ESSCIRC.2013.6649099
