LIU Su-juan, YANG Yue, ZHANG Te, et al. Calibration Technique of Channel Mismatches in Hybrid Filter Banks ADC[J]. Acta Electronica Sinica, 2011, 39(8): 1889-1893.
LIU Su-juan, YANG Yue, ZHANG Te, et al. Calibration Technique of Channel Mismatches in Hybrid Filter Banks ADC[J]. Acta Electronica Sinica, 2011, 39(8): 1889-1893.DOI:
The channel mismatches degrade the reconstruction performance of hybrid filter banks (HFB) analog-to-digital converters (ADC).This paper presents a comprehensive model that takes gain
phase
and bandwidth mismatches into account.Based on this model
a method that calculates the value of the channel mismatches by solving overdetermined equations is developed.An improved architecture is introduced based on the model and the perfect reconstruction expression is derived.Finally
a two-channel 160MHz 12-bit HFB ADC system is implemented.The experimental results show that the proposed calibration technique produces about 23 dB of spurious-free dynamic range (SFDR) enhancement.