一个12位2GS/s单通道高线性管道ADC在40nmCMOS中
Feitong Wu1,2, Xuan Guo1, Hanbo Jia1
1Institute of Microelectronics of Chinese Academy of Sciences, Beijing 100029, China.
Micromachines
|July 29, 2023
概括
本研究介绍了一种用于宽带接收器的12位,2GS/s管道式模拟到数字转换器 (ADC). 新的设计增强了线性和带宽,在高速采样应用中实现了出色的性能.
科学领域:
- 电气工程 电气工程
- 信号处理 信号处理
- 集成电路设计 集成电路设计
背景情况:
- 宽带采样接收器需要高性能模拟数字转换器 (ADC) 来准确获取信号.
- 现有的ADC通常面临着对要求高的应用程序的线性,带宽和功率效率的限制.
研究的目的:
- 为了呈现一个新的单通道,12位,2GS/s管道式ADC架构,优化用于宽带采样接收器.
- 通过创新的电路设计来提高样本线性,扩展运行带宽,并提高ADC的整体性能.
主要方法:
- 实现了一种具有多个反循环的新型源追随器输入缓冲器,以提高线性和带宽.
- 引入了改进的双阶段充电放大器拓,可以在不增加功耗的情况下将增强带宽产品 (GBW) 翻一番.
- 采用一个多层次的dither策略与一个高速的伪随机代码生成器用于后端ADC和背景校准.
主要成果:
- 原型ADC采用40纳米CMOS工艺制造,在尼奎斯特频率下达到68.24dB的无伪性动态范围 (SFDR),采样速率为2GS/s.
- 证明的测量结果显示带宽超过5 GHz.
- 获得了152.4dB的高施瑞尔功绩数字 (FOM),表明了卓越的性能.
结论:
- 拟议的管道式ADC架构有效地解决了宽带采样的挑战,在线性和带宽方面提供了显著的改进.
- 创新的电路技术和校准策略使得高性能ADC适用于先进的接收系统.
- 制造出来的原型验证了设计对下一代高速数据转换的潜力.
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