alibration of Channel Mismatches in Time-interleaved ADCs Based on Multi-Frequency Reference Error Method

ZHANG Hao; SHI Yi-bing; WANG Zhi-gang; ZHU Zhao-xuan

doi:10.3969/j.issn.1000-1158.2011.02.15

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Acta Metrologica Sinica ›› 2011, Vol. 32 ›› Issue (2) : 162-167. DOI: 10.3969/j.issn.1000-1158.2011.02.15

alibration of Channel Mismatches in Time-interleaved ADCs Based on Multi-Frequency Reference Error Method

ZHANG Hao,SHI Yi-bing,WANG Zhi-gang,ZHU Zhao-xuan

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Abstract

Aiming at the problem of channel mismatch calibration in time-interleaved ADCs (TIADC), the characteristics of channel mismatch phenomena are firstly analyzed, then system calibration model is built based on reference channel, finally a new calibration approach called multi-frequency reference error method is introduced. This method can efficiently complete effective error compensation by fast frequency calculation and look up table. In addition to that, the applicability and calibration performance of the method in the whole input bandwidth of TIADC are further discussed. The simulation demonstrated that multi-frequency reference error method can improve the SFDR of TIADC beyond 25 dB.

Key words

Metrology / Multi-frequency reference error method / Channel mismatch / Time-interleaved ADC system

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ZHANG Hao,SHI Yi-bing,WANG Zhi-gang,ZHU Zhao-xuan. alibration of Channel Mismatches in Time-interleaved ADCs Based on Multi-Frequency Reference Error Method[J]. Acta Metrologica Sinica. 2011, 32(2): 162-167 https://doi.org/10.3969/j.issn.1000-1158.2011.02.15

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