A Low-Distortion Fourth-order Bandpass Sigma-delta Modulator Using Double-sampling Technique

摘要：

　　In this paper,a low-distortion fourth-order bandpass sigma-delta (ΣΔ) modulator is proposed based on a switched-capacitor resonator which employs double-sampling technique to relax the requirements for circuits and reduce opamp power consumption and chip area.The modulator is based on the low-distortion low pass ΣΔ modulator.The system level simulation results compare between the low-distortion architecture and the traditional one is given.The full differential circuit applying two-path technique is implemented with TSMC0.18μm CMOS process.It achieves a peak SNR (signal-to-noise ratio) of 85.9dB and DR (dynamic range) of 91dB with 200 kHz bandwidth centered at 20MHz which are better than the conventional bandpass ΣΔ modulator.

关键词： band-pass sigma-delta modulator double-sampling

作者: Honglin Xu Jiajun Zhou Jian Yang Song Chen Zhiqiang Gao Xiaowei Liu

作者单位: MEMS Center, Harbin Institute of Technology, Harbin, Heilongjiang, China MEMS Center, Harbin Institute of Technology, Harbin, Heilongjiang, China;Key Laboratory of Micro-Sys

会议类型: 国际会议

会议名称: 中国微米纳米技术学会第14届学术年会、第3届国际年会暨第6届微米纳米技术“创新与产业化国际研讨与展览会(CSMNT2012 & ICMAN2012)

会议地点: 杭州

会议语种:英文

页码: 1-5

在线出版日期: 2012-11-04（万方平台首次上网日期，不代表论文的发表时间）