A Novel Channel Randomization Method for Time-Interleaved ADCs

We introduce a novel randomization method for time-interleaved analog-to-digital converters (TIADCs). In contrast to conventional randomization methods our method improves the signal-to-noise and distortion ratio (SINAD) and the spurious free dynamic range (SFDR) by combining randomization of channel ADCs and spectral shaping of timing mismatches. The new method can exploit information about timing mismatches of the channel ADCs in order to optimize the randomized sequence. We provide the theoretical background, discuss aspects of the advanced randomization, and present simulation results