Title :
A self oscillating class D audio amplifier with 0.0012% THD+N and 116.5 dB dynamic range
Author :
Lu, Jingxue ; Gharpurey, Ranjit
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Texas at Austin, Austin, TX, USA
Abstract :
A low distortion third-order self-oscillating class D audio amplifier is integrated in a 0.7-μm CMOS process. It can deliver 1.4 W into an 8 Ω load with 5 V power supply. The presented amplifier eliminates the requirement for a high quality carrier. It achieves a dynamic range (DR) of 116.5 dB, and a peak THD+N of 0.0012% for a 1 kHz sinusoidal input. The efficiency is 84.5%. The area of the amplifier is 6 mm2.
Keywords :
CMOS analogue integrated circuits; audio-frequency amplifiers; harmonic distortion; CMOS process; THD+N; frequency 1 kHz; low distortion third-order audio amplifier; power 1.4 W; resistance 8 ohm; self oscillating class D audio amplifier; size 0.7 mum; voltage 5 V; Hysteresis; Logic gates; Modulation; Power generation; Signal to noise ratio; Switching frequency;
Conference_Titel :
Custom Integrated Circuits Conference (CICC), 2010 IEEE
Conference_Location :
San Jose, CA
Print_ISBN :
978-1-4244-5758-8
DOI :
10.1109/CICC.2010.5617615
