A Split-Based Digital Background Calibration Technique in Pipelined ADCs

作者：Hung Li Han^*; Lee Tai Cheng

来源：IEEE Transactions on Circuits and Systems II-Express Briefs, 2009, 56(11): 855-859.

DOI：10.1109/TCSII.2009.2034077

• Adaptive systems
• analog-to-digital conversion
• digital background calibration
• pipelined analog-to-digital converters (ADCs)

A digital background calibration technique is proposed to correct gain errors in pipelined analog-to-digital converters (ADCs). The calibration technique performs the error estimation and the adaptive error correction based on the concept of split ADCs. With the 1- or 1.5-bit realization in pipelined stages, capacitor-mismatch errors can be merged with gain errors, and the proposed calibration technique can be utilized. Behavioral simulations show that the signal-to-noise-and-distortion ratio of a 12-bit pipelined ADC with an 8-bit gain accuracy and the capacitor mismatch sigma = 0.125% can be improved from 56.4 to 73.8 dB. The calibration process converges in approximately 200 000 cycles.

• 出版日期2009-11
• 单位中国科学院电工研究所