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该论文提出了一款用于智能手机和平板电脑的2.5W D类音频放大器，在8Ω负载上实现了1% THD和104dB(A)动态范围。通过超低电磁干扰（EMI）系统和电流检测技术，解决了传统D类放大器在高功率输出下的线性度、噪声和EMI问题。
voltage range ideal for use with lithium batteries [1-4]. The high efficiency of Class-D amplifiers makes them ideal for operation from boosted supplies. Moreover, in order to provide a better user experience in all multi-media applications, the new smart-phones and tablets are demanding for output peak power of higher than 2W on 8Ω integrated speakers. In addition, new speakers can achieve better linearity and sensitivity leading to lower THD and noise specification for the amplifier. To better respond to this challenge, this work presents a 2.5W 1% THD Class-D amplifier on 8Ω load with 104dB(A) dynamic range having a set of features to cope with all high-power constraints such as high-frequency energy, battery reset and speaker damage. The proposed amplifier is integrated into a system
Angelo Nagari, Emmanuel Allier, Francois Amiard, Vincent Binet, Christian Fraisse
ST-Ericsson, Grenoble, France Class-D amplifiers for portable devices are typically specified for supply