A digital time skew calibration technique for time-interleaved ADCs

A digital time skew calibration technique for time-interleaved ADCs

In this paper, a digital time skew calibration technique for time-interleaved (TI) ADCs is presented. The time skew calibration for TI-ADCs in analog domain suffers from limited correction accuracy and additional jitter. And the proposed digital time skew calibration method estimates the polari...

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Bibliographic Details
Main Authors: Qiu, Lei, Tang, Kai, Zheng, Yuanjin, Siek, Liter
Other Authors: School of Electrical and Electronic Engineering
Format: Conference or Workshop Item
Language:English
Published: 2016
Subjects:
Electrical and Electronic Engineering
Analog to digital conversion
Calibration
Online Access:https://hdl.handle.net/10356/82918
http://hdl.handle.net/10220/40366
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Institution: Nanyang Technological University
Language: English
Description
Summary:In this paper, a digital time skew calibration technique for time-interleaved (TI) ADCs is presented. The time skew calibration for TI-ADCs in analog domain suffers from limited correction accuracy and additional jitter. And the proposed digital time skew calibration method estimates the polarity of the time skew through correlation of adjacent channels and corrects the time error by adopting adaptive fractional delay filters iteratively. Simulation results show that, in a 4-channel 1GS/s 12-bit TI-ADC system, the SFDR can be improved to 78dB by 5-order FIR filters within a calibration range of [-0.005/fs, +0.005/fs].

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