Next Article in Journal
Sign Language Representation by TEO Humanoid Robot: End-User Interest, Comprehension and Satisfaction
Next Article in Special Issue
Maximal Q Factor for an On-Chip, Fuse-Based Trimmable Capacitor
Previous Article in Journal
Efficient Pilot Decontamination Schemes in 5G Massive MIMO Systems
Previous Article in Special Issue
More Discussions on Intrinsic Frequency Detection Capability of Full-Rate Linear Phase Detector in Clock and Data Recovery
Article Menu
Issue 1 (January) cover image

Export Article

Open AccessArticle
Electronics 2019, 8(1), 56; https://doi.org/10.3390/electronics8010056

Automatic Calibration Method of Channel Mismatches for Wideband TI-ADC System

National Key Laboratory of Science and Technology on ATR, National University of Defense Technology, Changsha 410073, China
*
Author to whom correspondence should be addressed.
Received: 27 November 2018 / Revised: 17 December 2018 / Accepted: 28 December 2018 / Published: 4 January 2019
Full-Text   |   PDF [4765 KB, uploaded 4 January 2019]   |  

Abstract

Time-interleaved analog-to-digital converter (TI-ADC) technology can increase the sampling rate without changing resolution. But, the dynamic performance of TI-ADC system is seriously deteriorated by channel mismatches. Under the condition of large bandwidth, gain mismatch and timing mismatch vary with the frequency, which cannot be regarded as fixed values. To improve the dynamic performance of the TI-ADC system, an automatic calibration method of channel mismatches for wideband TI-ADC system is proposed in this article. Frequency-dependent channel mismatches are estimated by the algorithm based on sine fitting, and compensated by the means based on perfect reconstruction. The entire sampling and calculation process is automated and tedious operation is simplified. A 6.8-GS/s 12-bit wideband TI-ADC system is implemented. This sampling system can achieve SNDR (signal-to-noise and distortion ratio) above 49 dB and SFDR (spurious-free dynamic range) above 57 dB for an input signal from 100 MHz to 3300 MHz. The proposed calibration method improves the SNDR over 10 dB and the SFDR over 15 dB. The dynamic performance of the sampling system is close to that of its sub-ADC. View Full-Text
Keywords: time-interleaved ADC; automatic calibration; gain mismatch; timing mismatch; sine fitting; perfect reconstruction time-interleaved ADC; automatic calibration; gain mismatch; timing mismatch; sine fitting; perfect reconstruction
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
SciFeed

Share & Cite This Article

MDPI and ACS Style

Li, J.; Pan, J.; Zhang, Y. Automatic Calibration Method of Channel Mismatches for Wideband TI-ADC System. Electronics 2019, 8, 56.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Electronics EISSN 2079-9292 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top