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A Fully Digital Background Calibration of Timing Skew in Undersampling TI-ADC

Han Le Duc 1, 2 Chadi Jabbour 1, 2 Patricia Desgreys 1, 2 Olivier Jamin 1, 2 V. T. Nguyen 1, 2 
1 C2S - Circuits et Systèmes de Communication
LTCI - Laboratoire Traitement et Communication de l'Information
Abstract : Abstract—This paper proposes a fully digital calibration of timing mismatch for undersampling Time Interleaved Analog-to-Digital Converter (TI-ADC) employed in Software Defined Radio (SDR) receivers. The proposed calibration scheme employs an ideal differentiator filter, a Hilbert transform filter and a scaling factor to compute the derivative of the input in any Nyquist Band (NB). The efficiency of the proposed technique is shown using a four-channel undersampling 60 dB SNR TI-ADC clocked at 2.7 GHz. Monte Carlo simulations show SNDR and SFDR improvements ofrespectively,18 dB and 21 dB over the first three NBs.
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Submitted on : Sunday, December 15, 2019 - 12:48:27 PM
Last modification on : Friday, April 1, 2022 - 6:00:02 PM


  • HAL Id : hal-02412166, version 1


Han Le Duc, Chadi Jabbour, Patricia Desgreys, Olivier Jamin, V. T. Nguyen. A Fully Digital Background Calibration of Timing Skew in Undersampling TI-ADC. New Circuits and Systems Conference (NEWCAS), 2014 IEEE 12th International, Jun 2014, Trois-Rivières, Canada. pp.53-56. ⟨hal-02412166⟩



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