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一个基于基因算法的多维校准在12位750 MS/s管道ADC中

Hanbo Jia¹, Xuan Guo¹, Huaiyu Zhai^1,2

¹Institute of Microelectronics of the Chinese Academy of Sciences, Beijing 100029, China.

|September 28, 2023

概括

本研究引入了一种使用遗传算法 (GA) 的多维校准技术,以提高管道模拟数字转换器 (ADC) 的精度. 该方法显著提高了信号噪声比和动态范围,这对于高速应用至关重要.

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:

管道式模拟数字转换器 (ADC) 对于高速和高分辨率的数据转换至关重要.
管道式ADC的准确性主要受多个数字对模拟转换器 (MDAC) 的错误限制,包括电容不匹配和间阶段增强错误 (IGE).

研究的目的:

开发和验证一个多维 (M-D) MDAC校准技术,用于12位750 MS/s管道ADC.
为了弥补MDAC中的静态和动态错误,从而提高ADC的整体性能.

主要方法:

实施一个多维 (M-D) MDAC补偿模型,其中包含一个用于前景校准的遗传算法 (GA).
使用伪随机数 (PN) 注入用于随后的背景校准,以解决动态IGE.
开发基于GA的M-D系数提取方案,以避免局部最佳.

主要成果:

拟议的校准显著改善了原型12位750 MS/s管道ADC的性能.
信号对噪声和扭曲比率 (SNDR) 从49.9dB提高到59.6dB,虚无动态范围 (SFDR) 在25°C下从66.7dB提高到77.5dB.
背景校准进一步提高了SNDR的3.4dB和SFDR的8.8dB在85°C.

结论:

基于GA的多维MDAC校准有效地弥补了管道ADC中的电容器不匹配和IGE.
拟议的技术提高了静态和动态性能,证明了其适用于高性能ADC应用的适用性.
该方法提供了一个强大的解决方案,用于提高不同温度的高速,高分辨率管道ADC的精度.

关键词:

模拟到数字转换器的模拟到数字转换器电容器不匹配的情况遗传算法是一种遗传算法.间阶段增强误差间阶段增强误差有管道的管道.

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