Abstract
This paper proposes a configurable structure of time-interleaved ADC (TI-ADC) with digital blind calibration for time-variant input signal. The channel number of the TI-ADC and the corresponding digital calibration could adapt to the input frequency, which would significantly decrease the power consumption of the TI-ADC as well as reduce the complexity of the digital calibration. In the proposed structure, the input signal is firstly fed into the power detector to roughly determine the range of the input frequency. Then the TI-ADC system activates the required sub-ADC channels accordingly and the calibration module changes to adapt to the input signal. In addition, numerical simulations have been presented to demonstrate the effectiveness and superiority of the proposed structure, which shows the proposed structure could significantly decrease the power consumption of the TI-ADC module as well as the calibration module.
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