JSSC 2025第12期Power Management0.5 µm

A Low-EMI, High-DR Class-D Audio Ampliﬁer With Double-Sided V oltage-Boosting Modulation Jhuang-Wei Cyue

本文提出一种采用双面电压提升调制的数字输入D类音频放大器，具有高动态范围和低电磁干扰。

动态范围121.3 dB，峰值信噪比115 dB，总谐波失真加噪声0.0019%，最大输出功率1.6 W，峰值功率效率87.2%

D类音频放大器双面电压提升电容耦合斩波放大器电磁干扰动态范围

▸双面电压提升调制

▸电容耦合斩波放大器

▸单电感降压-升压功率级

Abstract

This article presents a digital-input class-D audio ampliﬁer (CDA) that employs a double-sided voltage-boosting (DSVB) modulation scheme, integrating a capacitively coupled chopper ampliﬁer (CCCA) with a single-inductor buck–boost power stage. The CCCA achieves a high dynamic range (DR) due to its very low noise ﬂoor and is implemented with common low-voltage (LV) input devices, while the voltage-boosting power stage achieves a boosted output power ( POUT) with good power eﬃciency due to its sin