A High Bandwidth Sigma-Delta Modulator Applied in Micro-Gyroscope

摘要：

　　In this paper a fourth-order single-loop sigma-delta modulator applied in micro-gyroscope is designed.The modulator system chose the fully feedforword structure.The signal bandwidth is 200KHz,oversampling ratio is 64 and sampling frequency is 25.6MHz.By system simulation result in Matlab,the signal to noise ratio (SNR) is 92.3dB and effective number of bits (ENOB) is 15.03bits.The whole circuit of modulator is designed and simulated in Cadence Spectre.It is gotten that the SNR is 78.6dB and changes linearly with input level.When input level is bigger than -4dBFs,the modulator becomes overload.

关键词： Modulator Sigma-delta 200KHz Micro-Gyroscope

作者: Fu Qiang Chen Song Liu Liang Wang Pengfei Chen Weiping Liu Xiaowei

作者单位: MEMS Center, Harbin Institute of Technology

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）