Title :
Blind calibration of nonlinearity mismatch errors in two-channel time-interleaved ADCs
Author :
Yinan Wang ; Johansson, Hakan ; Hui Xu ; Zhaolin Sun
Author_Institution :
Coll. of Electron. Sci. & Eng., Nat. Univ. of Defense Technol., Changsha, China
Abstract :
To preserve the effective resolution of the individual converters in time-interleaved analog-to-digital converters (TIADCs), channel mismatches should be carefully corrected. In this paper, the proposed method is concentrated on achieving adaptive blind calibration for nonlinearity mismatches in two-channel TIADCs. It utilizes a least-mean square (LMS) algorithm as well as a polynomial-represented nonlinearity model. We assume a certain degree of oversampling for the overall converter to estimate and compensate for the mismatch errors. The calibration accuracy and convergence rate are investigated and evaluated through behavioral-level simulations.
Keywords :
analogue-digital conversion; calibration; error compensation; least mean squares methods; polynomials; LMS algorithm; adaptive blind calibration accuracy; behavioral-level simulations; channel mismatches; convergence rate; individual converter resolution; least mean square algorithm; nonlinearity mismatch error compensation; overall converter oversampling; polynomial-represented nonlinearity model; time-interleaved analog-to-digital converters; two-channel TIADC; Calibration; Convergence; Educational institutions; Frequency-domain analysis; Least squares approximations; Polynomials; Sun;
Conference_Titel :
Electronics, Circuits and Systems (ICECS), 2014 21st IEEE International Conference on
DOI :
10.1109/ICECS.2014.7050052
