A Modified Background Calibration Technique for Multi-bit Delta-Sigma Modulators

摘要：

A digital background calibration technique for capacitors mismatch in multi-bit delta-sigma modulator is proposed in this paper. The approach is correlation-based, in which a single-bit pseudorandom noise (PN) is used to identify the error module, minimizing the analog circuit overhead. This algorithm works by estimating every DAC capacitor in turn with the PN signal injection and compensates for capacitor mismatch in digital domain. It is simple and requires minor circuit modification in analog domain. The tradeoff involved is the dynamic range degradation due to PN injection. Behavior level simulations demonstrate effective compensation for capacitors mismatch in a second-order modulator.

关键词： Capacitormismatch Delta-Sigmamodulator digital calibration PN sequence SNDR

作者: Bei Peng Hao Li Pingfen Lin

作者单位: Beijing Embedded System Key Lab Beijing University of Technology Beijing, China Department of Modern Physics University of Science and Technology of China Hefei, China

会议类型: 国际会议

会议名称: 2011 3rd International Conference on Advanced Computer Control(2011年IEEE第三届高端计算机控制国际会议 ICACC2011)

会议地点: 哈尔滨

会议语种:英文

页码: 206-208

在线出版日期: 2011-01-18（万方平台首次上网日期，不代表论文的发表时间）