A Research on the Fast Correlation-Based Background Calibration Techniques for the Pipeline ADCs

摘要：

The problem of slow convergence speed exists in the correlation-based digital background calibration techniques for the pipeline ADC. The proposed improved techniques reduce the signal-dependent interference amplitude by clipping MSBs off the ADC output. Meanwhile, the exponential averager is introduced into the LMS iteration. These means can not only calibrate capacitors mismatch in MDACs and the finite gain and bandwidth of the interstage opamp, but also converge more than 20 times faster than normal correlation-based calibration techniques. A behavioral model of 12bits pipeline ADC with 2％ interstage gain error in the first stage is presented to verify the efficiency of the calibration techniques. With calibration, simulation results show that SFDR enhances from 69dB to 98dB and SNDR enhances from 53.8dB to 73.5dB.

作者: Liang Shang-Quan Yin Yong-Sheng Deng Hong-Hui Zang Rui Hu Jun

作者单位: Institute of VLS1 design, Hefei University of Technology, Hefei 230009, China

会议类型: 国际会议

会议名称: 2010 10th IEEE International Conference on Solid-State and Integrated Circuit Technology(第十届固态和集成电路技术国际会议 ICSICT-2010)

会议地点: 上海

会议语种:英文

页码: 430-432

在线出版日期: 2010-11-01（万方平台首次上网日期，不代表论文的发表时间）