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Proceedings Paper

Channel mismatch estimation in time-interleaved ADCs based on input dependent estimating model
Author(s): Sujuan Liu; Junshan Wang; Peipei Qi
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Paper Abstract

Time-interleaved Analog-to-Digital Converter (TIADC) is an efficient way to achieve higher sampling rates for medium-to-high resolution applications. However, the performance of a TIADC suffers from mismatch errors among the sub-channels. This paper presents a method to estimate the channel mismatch errors using the sub-channels' output data. The proposed method introduces an input dependent estimating model (IDEM) based on an equivalent transfer function including the mismatch errors to calculate the standard deviation of the mismatch errors. The spurious-free dynamic range (SFDR) is then evaluated by applying multi-tone sinusoids signal to input. The simulated results show that the method in this work can get about 45dB SFDR enhancement.

Paper Details

Date Published: 2 June 2012
PDF: 5 pages
Proc. SPIE 8334, Fourth International Conference on Digital Image Processing (ICDIP 2012), 83340S (2 June 2012); doi: 10.1117/12.946063
Show Author Affiliations
Sujuan Liu, Beijing Univ. of Technology (China)
Junshan Wang, Beijing Univ. of Technology (China)
Peipei Qi, Beijing Univ. of Technology (China)

Published in SPIE Proceedings Vol. 8334:
Fourth International Conference on Digital Image Processing (ICDIP 2012)
Mohamed Othman; Sukumar Senthilkumar; Xie Yi, Editor(s)

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