Research on Calibration of HFB ADC Channel Error Based on Domestic ADC Chip
LIU Yuyu
LI Jie
MA Xihong
YANG Weilin
SUN Pengxiang
Abstract：Nowadays,our country is facing the problem of the localization demand of high-precision weapons and their test sys-tems,especially when the sampling rate of the data acquisition system reaches the level of GSPS,the domestic ADC chip is difficult to meet the requirements,so the model of optimizing the power complementary tree structure is proposed on the premise of increasing the sampling rate without decreasing the sampling accuracy.In addition,to analyze the mismatch problem of the HFB ADC system,an error calibration method based on the four-parameter least-squares fitting of the sine wave is proposed and the error is corrected in the digital domain.The simulation and experimental results show that the algorithm can estimate the mismatch error of the system better and reduce the distortion error and aliasing error effectively compared with the data before calibration,which is of great practi-cal significance for solving the problem of localization of high-speed and high-precision data acquisition equipment.
Keywords：domestic ADCpower complementary pairschannel mismatchleast squares fittingdistortion errorstacking error
Publication Date：2025-07-20
Online Publishing Date：2025-09-25(First online date of this platform, not the publication date of the document)
Pages：6( 65-70 )