Channel Mismatches Correction in Time-Interleaved ADCs Based on Hybrid Filter Bank Reconstruction

查看全文 作　　者：LIU [1]Sujuan;ZHUO [1]Li;JIANG [1]Wenshu;ZHANG [1]Meihui

机构地区：[1]College of Electronic Information and Control Engineering, Beijing University of Technology

出　　处：《Chinese Journal of Electronics》索引2014年第23卷第1期,共6页

基　　金：supported by the National Natural Science Foundation of China(No.61106028);in part by the Scientific Research Project of Beijing Educational Committee(No.KM201110005006) 摘　　要：Time-interleaved analog-to-digital converter(TIADC) is an efficient way to achieve higher sampling rate for medium-to-high resolution applications. The performance of a TIADC suffers from the mismatch errors among the sub-channels. This paper presents a method to estimate the channel mismatches using the sub-channels output data. The proposed method introduces an equivalent transfer function for each channel to model and estimate the mismatch errors. A Hybrid filter bank(HFB)structure is used to both model the TIADC and reconstruct the desired uniformly sampled sequence based on the perfect reconstruction conditions of the HFB system.A four-channel 12-bit 400 MHz TIADC has been implemented in hardware to verify the proposed calibration method. The measured results show that the Spuriousfree dynamic range(SFDR) can be improved up to 74 d B after being corrected with 64-tap Finite-impulse response(FIR) filters. 关键词：混合滤波器组通道失配时间交织 ADC 重构正基有限脉冲响应结构基础

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Channel Mismatches Correction in Time-Interleaved ADCs Based on Hybrid Filter Bank Reconstruction

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