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首页> 外文期刊>IEEE Journal of Solid-State Circuits >A 20-W stereo class-D audio output power stage in 0.6-Μm BCDMOS technology
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A 20-W stereo class-D audio output power stage in 0.6-Μm BCDMOS technology

机译:采用0.6μmBCDMOS技术的20W立体声D类音频输出功率级

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摘要

This paper presents a highly power efficient 2×20-W class-D audio output power stage implemented in 0.6-Μm BCDMOS technology. The presented power stage is capable of driving 2×8-Ω loads from a 20-V power supply at a power efficiency approaching 90%. Circuit details of thermal detection, over-current protection, and startup speaker click/pop are also presented. The performance of open-loop Class-D output stages are limited by the distortion mechanisms present within the power stage itself. A third-order PWM modulator was prototyped and used to dramatically improve the performance of the Class-D output stage by using feedback. The results of this work are also presented.
机译:本文介绍了采用0.6μmBCDMOS技术实现的高功率效率2×20 W D类音频输出功率级。提出的功率级能够以接近90%的功率效率从20V电源驱动2×8Ω负载。还介绍了热检测,过电流保护和启动扬声器的咔哒声/爆裂声的电路详细信息。开环D类输出级的性能受到功率级自身内部存在的失真机制的限制。对三阶PWM调制器进行了原型设计,并用于通过使用反馈显着改善D类输出级的性能。还介绍了这项工作的结果。

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