@inproceedings{8beea8454af34f28ae298a53e3256feb,
title = "A low THD clock-free Class-D audio amplifier with an increased damping resistor and cross offset cancellation technique",
abstract = "An increased damping resistor (IDR) replaces high-order loop filter to simply reduce the total harmonic distortion (THD) of Class-D audio amplifier. Besides, cross offset cancellation (COC) technique minimizes the system offset voltage to avoid dc current flows to the speaker in the bridge tied load (BTL) structure. Furthermore, variable switching frequency characteristic in self-oscillating modulation spreads the electro-magnetic interference (EMI) impact out on the output frequency spectrum. Experimental results demonstrate that the proposed Class-D amplifier can deliver 0.55W to the 8ω load with a 3.3V supply voltage with 150-nm CMOS process. The power efficiency is over 90% and the output THD is smaller than 0.01% (80dB).",
keywords = "audio amplifier, Class-D audio amplifier, clock-free, mobile application, offset cancellation, self-oscillating",
author = "Chou, {Ying Wei} and Chien, {Meng Wei} and Chen, {Shin Chieh} and Ke-Horng Chen and Lin, {Ying Hsi} and Tsai, {Tsung Yen} and Huang, {Chen Chih} and Lee, {Chao Cheng} and Tai, {Zhih Han} and Cheng, {Yi Hsuan} and Tsai, {Chi Chung} and Luo, {Hsin Yu} and Wang, {Shih Ming} and Chen, {Long Der} and Yang, {Cheng Chen} and Hui, {Huang Tian}",
year = "2014",
month = jan,
day = "1",
doi = "10.1109/ISCAS.2014.6865725",
language = "English",
isbn = "9781479934324",
series = "Proceedings - IEEE International Symposium on Circuits and Systems",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
pages = "2680--2683",
booktitle = "2014 IEEE International Symposium on Circuits and Systems, ISCAS 2014",
address = "United States",
note = "null ; Conference date: 01-06-2014 Through 05-06-2014",
}