New high-efficiency 2.5 V/0.45 W RWDM Class-D audio amplifier for portable consumer electronics

被引：36

作者：

Li, SC ^{[1
]}

Lin, VCC

Nandhasri, K

Ngarmnil, J

机构：

[1] Natl Yunlin Univ Sci & Technol, Adv Technol & Integrated Syst Lab, Touliu, Yunlin, Taiwan

[2] Natl Univ Tainan, Inst Commun Engn, Tainan, Taiwan

[3] Etrend Elect Inc, Analog Ctr, Tainan 741, Taiwan

[4] Mahanakorn Univ Technol, Dept Elect Engn, Bangkok 10530, Thailand

来源：

IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS I-REGULAR PAPERS | 2005年 / 52卷 / 09期

关键词：

analog integrated circuits; audio amplifier; Class D; floating gate; power efficiency; rectangular wave delta modulator (RWDM);

D O I：

10.1109/TCSI.2005.852500

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

A single-chip of Class-D audio amplifier with high-power efficiency is presented. It includes a rectangular wave delta modulator (RWDM) and bridge-tied load output gate-drivers. The RWDM has a multiple inputs floating-gate hysteresis comparator and a feedback integrator formed by the external L-R low-pass filter. This monolithic Class-D audio amplifier with a maximum power efficiency of 92% has a flat frequency response with +/- 0.3 dB up to 20 kHz, and is capable of delivering up to 0.45 W of continuous average power into an 8-Omega load at less than 0.5% total harmonic distortion plus noise from a 2.5-V power supply in the high fidelity range (20 Hz-20 kHz).

引用

页码：1767 / 1774

页数：8