A low-complexity digital background calibration of sample-time error in time-interleaved A/D converters

作者：Bazrafshan Amir^*; Taherzadeh Sani Mohammad; Nabki Frederic

来源：Analog Integrated Circuits and Signal Processing, 2013, 76(2): 245-249.

DOI：10.1007/s10470-013-0078-y

• Time-interleaved ADC
• Sample-time error
• Background calibration
• Zero-crossing

A digital background calibration technique to estimate the sample-time error (timing-skew) in time-interleaved ADCs is presented. Compared to the state-of-the-art, this technique requires a simpler digital block and, hence, a lower power dissipation. The proposed technique detects timing skew for each channel by means of finding zero-crossing samples with respect to a reference comparator. Simulation results show that it can effectively correct timing errors for any type of input signal up to Nyquist, and achieves a high convergence speed with a very low computational complexity.

• 出版日期2013-8