Received: 20 October 2020Revised: 21 November 2020Accepted: 19 December 2020
Ahmad Riahi
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Abstract
This paper attended to one of the most important bottlenecks of time-interleaving architecture for high-speed ADCs. A fully digital background calibration method based on maximizing the similarity between noiseless sub ADC channel and TI-ADC output has been proposed. An adaptive filter with arbitrary size has been used in channel one as noisy channel and it converges to the optimum value by using least-mean-square (LMS) algorithm. This method can be applied for more number of channels cases. Simulations validate the improvements in functionality of TI-ADC achieved by proposed method.
Keywords: Time-Interleaved, Analog to Digital Converter, Calibration, LMS, Adaptive Calibration, Background Calibration, Rose Calibration Company, Melbourne,