A robust continuous time loop filter PWM class D amplifier with high linearity and good immunity to process variations

Hsin-Hong Hou, Chung-Wei Lin, Wentao Chen
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Abstract

This paper describes a robust PWM class D amplifier with high linearity and good immunity to process variations. By using the proposed adaptive triangular wave generator (ATG), 0.0042% THD+N and 99.2dB dynamic range is achieved in this design. The standard deviation of THD+N ratio over 22 samples can be smaller by 4 times compared to the results without the adaptive triangular wave generator. This chip integrates power MOS stages and 2 channel design. The supply voltage is from 3V to 5.5V and the die area is 2.45mm × 2.9mm.
一种鲁棒连续时间环滤波器PWM D类放大器,具有高线性度和良好的抗工艺变化能力
本文介绍了一种鲁棒的D类PWM放大器,具有高线性度和良好的抗工艺变化能力。采用自适应三角波发生器(ATG)实现了0.0042%的THD+N和99.2dB的动态范围。与不使用自适应三角波发生器相比,22个样品的THD+N比的标准差可减小4倍。该芯片集成了功率MOS级和2通道设计。电源电压3V ~ 5.5V,模具面积2.45mm × 2.9mm。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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