A Fourth-order Cascaded Full Feed-forward Sigma-delta Modulator

摘要：

This paper presents a structure of a fourth-order cascaded full feed-forward Sigma-delta modulator. Because there is no feedback but only feed-forward path between two stages, cascaded sigma-delta modulator is unnecessary to consider the stability problems, and has the identical performance with ideal high-order single-loop sigma-delta modulator. The system level simulation results show that the signal to noise rate (SNR) of the designed sigma-delta modulator is 148 and the effective number of bits (ENOB) is 24.4 when the oversampling ratio (OSR) is 128.

关键词： modulator cascade sigma-delta system quantization noise

作者: Qiang Lu Xiaowei Liu

作者单位: Department of Microelectronics Harbin Institute of Technology Harbin, China Department of MicroelectronicsHarbin Institute of TechnologyHarbin, China

会议类型: 国际会议

会议名称: 2012 International Conference on Optoelectronics and Microelectronics(2012光电子与微电子国际学术会议 2012 ICOM)

会议地点: 长春

会议语种:英文

页码: 466-469

在线出版日期: 2012-08-23（万方平台首次上网日期，不代表论文的发表时间）