TY - GEN
T1 - Design and implementation of a fully-digital, high-efficiency class-D amplifier system
AU - Liu, Yi Hwa
AU - Teng, Jen Hao
AU - Hsieh, Chin Hsin
PY - 2007
Y1 - 2007
N2 - Recent advances in semiconductor technology have renewed interest in class-D audio amplifiers, especially for portable devices and consumer electronics. The motivating factor driving research in class-D amplifiers is efficiency. In addition, one important benefit that class-D amplifiers bring is the ability to directly couple to a digital audio signal, removing the need to convert to analog first. In this paper, a FPGA-based digital audio amplifier has been developed, implemented and tested. The proposed class-D amplifier system can keep the audio signal chain in the digital domain, which prevents transmission noise from distorting the audio signal. In order to achieve the goals of high fidelity and high efficiency, a zero voltage switching (ZVS) modulation strategy is also presented. The experimental system demonstrates that fully digital audio amplification is possible. According to the experimental results, the proposed test system is able to deliver more than 15 W into a 4 Ω load with an efficiency of 80% and total harmonic distortion less than 2%.
AB - Recent advances in semiconductor technology have renewed interest in class-D audio amplifiers, especially for portable devices and consumer electronics. The motivating factor driving research in class-D amplifiers is efficiency. In addition, one important benefit that class-D amplifiers bring is the ability to directly couple to a digital audio signal, removing the need to convert to analog first. In this paper, a FPGA-based digital audio amplifier has been developed, implemented and tested. The proposed class-D amplifier system can keep the audio signal chain in the digital domain, which prevents transmission noise from distorting the audio signal. In order to achieve the goals of high fidelity and high efficiency, a zero voltage switching (ZVS) modulation strategy is also presented. The experimental system demonstrates that fully digital audio amplification is possible. According to the experimental results, the proposed test system is able to deliver more than 15 W into a 4 Ω load with an efficiency of 80% and total harmonic distortion less than 2%.
UR - https://www.scopus.com/pages/publications/48649085688
U2 - 10.1109/TENCON.2007.4429140
DO - 10.1109/TENCON.2007.4429140
M3 - 会议稿件
AN - SCOPUS:48649085688
SN - 1424412722
SN - 9781424412723
T3 - IEEE Region 10 Annual International Conference, Proceedings/TENCON
BT - TENCON 2007 - 2007 IEEE Region 10 Conference
T2 - IEEE Region 10 Conference, TENCON 2007
Y2 - 30 October 2007 through 2 November 2007
ER -