摘要
提出MASH21调制器的自顶向下设计方法。在系统级,通过系数缩放对积分器的输出进行限制;在电路级,通过积分器的瞬态建模分析运放非理想因素对调制器的影响,并得到SNR和面积功耗最优的设计区域。通过一个数字音频MASH21调制器的设计对此方法进行了验证。该调制器基于TSMC18MMRF工艺实现,在1.8 V的单电压下工作,测试显示调制器的SNDR达到91 dB。
The authors propose a top-down design process for MASH21 modulator. In system level, coefficient scaling is used to limit integrator＇s output; in circuit level, integrator transient modeling is used to analyze the effect caused by OP＇s non-ideality, and get the optimized design region for SNR, area and power. A MASH21 modulator for digital audio application is designed to verify the proposed design criteria. This experimental prototype is implemented with TSMC18MMRF, operates under a single 1.8 V power supply, and achieves a measured SNDR of 91dB.
出处
《北京大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2011年第4期593-598,共6页
Acta Scientiarum Naturalium Universitatis Pekinensis
基金
深圳市科技计划(QK200610)资助
