← 返回 JSSC 论文列表JSSC 2019第10期Data Converters180nmDelta-Sigma ADC
A Continuous-Time Delta-Sigma Modulator Using a Modified Instrumentation Amplifier
提出一种改进型仪表放大器作为积分器的连续时间ΔΣ调制器，用于神经记录前端。
180nm CMOS, 90dB动态范围, 0.005% THD, 90dB CMRR, 23μW/通道
连续时间ΔΣ调制器仪表放大器电流反馈神经记录低功耗设计
▸改进仪表放大器作为ΔΣ调制器的积分器
▸反馈DAC电流复用技术降低功耗
▸高输入阻抗与宽线性工作范围设计
Abstract
The use of continuous-time delta-sigma modulators
(CTDSM) as a replacement of traditional analog sensor front
ends has become an increasingly popular choice. The absence
of traditional sensor interface circuits, such as instrumentation
amplifiers (IAs), reduces area and power consumption at the
cost of robustness offered by these circuits. Selection of the
integrator type in the CTDSM is a selection of the ADC
properties. This article presents a current feedback CTDSM
with high input impedance, w