Research on Noise Simulation of Dynamic Comparator
Yinghao Liu, Xiaoman Wang, Xiaokun Yang, Jinwang Li, Chang Liu, Liguo Xu · Proceedings of the 2021 5th International Conference on Electronic Information Technology and Computer Engineering · 2021
Different from the traditional comparator structure in continuous time system, dynamic comparator is a type of comparator in discrete-time system. The previous method of simulating traditional comparator is not suitable for dynamic comparator. Aiming at the noise problem of the dynamic latch comparator in the discrete-time system in the design and simulation of analog-to-digital converter, a noise simulation method of the comparator based on the concept of Gaussian probability distribution is designed. The offset voltage VOS is added to the two ends of the comparator, and repeat the same comparison simulation of the comparator for many times, and the Gaussian probability distribution function is obtained. At the same time, use MATLAB tools to solve the noise energy, so as to evaluate the effect of noise 3σ on the analog-to-digital converter.