带峰值检测器的高效率无滤波器D类放大器

2012 8th International Caribbean Conference on Devices, Circuits and Systems (ICCDCS) Pub Date : 2012-03-14 DOI:10.1109/ICCDCS.2012.6188910

C. Jin, M. T. Tan, K. See

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引用次数: 0

摘要

本文提出了一种全集成无滤波器的D类放大器，其中包含一个峰值检测器，以提高低功率范围的功率效率。峰值检测器通过感应输入信号的幅度来相应地监视开关频率。D类放大器采用0.18μm CMOS技术制造，总面积为1 mm2。根据我们的测量，所提出的设计在宽输出功率范围(50 mW-700 mW)下具有高功率效率(> 86%)。我们的设计在整个调制指数范围和感兴趣的音频频带(100 Hz-6 kHz)上都保持了非常好的低总谐波失真(THD)(< 0.09%)。

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High-efficiency filterless Class D amplifier with peak detector

This paper presents a fully integrated filterless Class D amplifier embodying a peak detector to improve the power efficiency at low power range. The peak detector monitors the switching frequency accordingly by sensing the amplitude of the input signal. The Class D amplifier is fabricated using 0.18μm CMOS technology with a total area of 1 mm2. From our measurements, the proposed design has high power efficiency (>;86%) for a wide output power range (50 mW-700 mW). Our design maintains very good low total harmonic distortion (THD) (<;0.09%) over both entire modulation index range and the audio band of interest (100 Hz-6 kHz).

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2012 8th International Caribbean Conference on Devices, Circuits and Systems (ICCDCS)

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