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A digital-mixing-based method for timing skew estimation in time-interleaved ADCs.
- Source :
-
Microelectronics Journal . Sep2019, Vol. 91, p46-52. 7p. - Publication Year :
- 2019
-
Abstract
- Time-interleaving has been a popular choice for multi-GHz analog-to-digital converters (ADCs). Unfortunately, inherent defects such as offset, gain, timing-skew mismatches among sub-ADCs degrade overall performance seriously. At present, the method for eliminating offset and gain mismatch is fairly straightforward, however, calibration for timing-skew is still in a state of exploration. An efficient digital-mixing-based method to estimate timing skew in time-interleaved analog-to-digital converters (TI-ADCs) is proposed and verified. The timing skew can be estimated by digital-mixing and inverse sine function processing. The proposed method can greatly alleviate the effects of phase ambiguity. It is also insensitive to offset mismatch. A four-channel TI-ADC behavioral system of 10-bits 2 GS/s has been simulated to verify the performance of the method. Simulation results demonstrate that the method greatly improves the TI-ADC′s performance and is effective up to the severe timing skew mismatch. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00262692
- Volume :
- 91
- Database :
- Academic Search Index
- Journal :
- Microelectronics Journal
- Publication Type :
- Academic Journal
- Accession number :
- 138500069
- Full Text :
- https://doi.org/10.1016/j.mejo.2019.07.007