JSSC 2023第9期Data Converters40nmDACNeural Network Accelerator

A 2661193-µW 1019-dB SNR Direct Digitization Bio-Impedance Readout IC Tan-Tan Zh

一种高功率噪声效率的直接数字化生物阻抗读出IC，采用ΔΣ调制和反馈电流导向DAC技术。

101.9-dB SNR, 4-Hz带宽, 0.1-Hz 1/f噪声角, 152.6-dB FoM

生物阻抗直接数字化ΔΣ调制动态元件匹配电流平衡仪表放大器

▸基于ΔΣ调制的生物阻抗读出拓扑结构

▸反馈电流导向DAC减少残余电流

▸动态元件匹配技术降低1/f噪声和开关噪声

Abstract

This article presents a direct digitization bio- impedance (BioZ) readout IC with high power-to-noise efficiency over a wide input impedance range. This design features a delta- sigma (16)-based BioZ readout topology with the first-order noise shaping and a feedback current-steering digital-to-analog converter (IDAC) that minimizes the residual current to sup- press the input-dependent noise modulation in current bal- ancing instrumentation amplifier (CBIA). Furthermore, various dynamic element