A 10mW Stereo Audio CODEC in 0.13µm CMOS

📋 论文概要

该论文提出一款在0.13µm CMOS工艺下实现的1.5V 10mW全特性立体声音频CODEC，针对低电压和低功耗需求，集成了蓝牙无线电和电源管理单元。该CODEC包含麦克风PGA、音频ΔΣ ADC和DAC、扬声器驱动器及麦克风偏置发生器，适用于蓝牙耳机和智能手机等无线设备。

💡 主要创新点

• 实现了1.5V低电压、10mW超低功耗的立体声音频CODEC，显著延长便携设备电池寿命。
• 将CODEC与蓝牙无线电和电源管理单元单芯片集成，减小了系统体积和成本。
• 采用优化电路架构，在低电压下保持高性能的音频ΔΣ调制器设计。

🏷 关键词

📄 原文摘要

stereo audio CODECs are increasingly needed in wireless devices, such as Bluetooth headsets and smart phones. These portable devices are usually powered by low-voltage batteries with limited capacities. It is of particular importance that such CODECs be optimized for low-voltage operation and low-power consumption. The paper presents a 1.5V 10mW full-featured stereo audio CODEC that is integrated with a Bluetooth radio and PMU on a single die. As depicted in Fig. 4.5.1, the CODEC contains microphone PGAs, audio ΔΣ ADCs and DACs, speaker drivers and microphone bias generators. Each audio input path contains front-end filters, a microphone PGA and a 3rdorder continuous-time ΔΣ ADC, as shown in Fig. 4.5.2(a). An audio input source

👥 作者与机构

Xicheng Jiang1, Jungwoo Song1, Todd L. Brooks1, Jianlong Chen1, Vinay

Chandrasekar1, Felix Cheung1, Sherif Galal1, Darwin Cheung1, Gil Cho Ahn2, Madhulatha Bonu 1 Broadcom, Irvine, CA Sogang University, Seoul, Korea 2 Low-power and full-featured