JSSC 2022第4期Other180nmDelta-Sigma ADC

A Delta Sigma-Modulated Sample and Average Common-Mode Feedback Technique for Ca

提出一种基于Delta Sigma调制的采样平均共模反馈技术的声学模拟前端，具有稳定的高通频率拐点和低功耗特性。

180nm CMOS, 192nW总功耗, 100TΩ最大有效电阻

Delta Sigma调制共模反馈声学模拟前端低噪声放大器可编程增益放大器

▸Delta Sigma调制的采样平均共模反馈技术

▸自动饱和检测与恢复技术

▸可编程高通频率拐点以减少启动时间

Abstract

This work presents an acoustic analog front-end based on a delta sigma-modulated sample and average common- mode feedback technique. The proposed feedback offers a process and temperature stable high pass (HP) frequency corner, unity dc feedback gain, and a programmable HP frequency corner to reduce startup time. In addition, this article also presents an automatic saturation detection and recovery technique from in-band input artifacts. The proposed technique was imple- mented in the low-noise