一种行为级的仿真方法及Sigma-Delta模数转换器的最优化设计

北京大学学报（自然科学版）

一种行为级的仿真方法及Sigma-Delta模数转换器的最优化设计

张信,于敦山,盛世敏,谭志超

北京大学微电子研究所，北京100871；

收稿日期:2008-03-03 出版日期:2009-03-20 发布日期:2009-03-20

A Behavioral Simulation Method and an Optimized Design of Sigma-Delta ADC

ZHANG Xin， YU Dunshan， SHENG Shimin， TAN Zhichao

Institute of Microelectronics，Peking University，Beijing 100871;

Received:2008-03-03 Online:2009-03-20 Published:2009-03-20

摘要/Abstract

摘要： 提出了一种行为级仿真方法，可以用于Sigma-Delta模数转换器系统级和行为级设计。与传统的行为级设计方法相比，该方法拥有更高的速度，更加易于使用，并且对于行为级设计来说有更高的效率。采用这种仿真方法，能详细分析模拟电路单元的非理想特性如积分器、比较器、运算放大器等，有助于实现高性能设计。为了验证该设计方法的有效性，设计了一个二阶Sigma-Delta模数转换器，并采用0.13μm混合信号CMOS工艺进行了流片。测试结果显示，调制器可以实现77.2dB的最高信噪比，相当于12.5位量化精度，而功耗仅为5.9mW(包括抽取滤波器为6.2mW)。

关键词: 电路非理想特性, Sigma-Delta模数转换器, 行为级仿真

Abstract: A behavioral simulation method is proposed for both system level and behavioral level design of Sigma-Delta ADCs (analog to digital converters).Compared with traditional behavioral simulation methods，the proposed method has a higher simulating speed and is more efficient in the behavioral design.With this simulation method，the imperfections of the analog cells as integrators，comparator，and the Op-Amps are analyzed in detail，which guides the design towards high performance. As a proof for the effectiveness of this method，a second-order Sigma-Delta modulator was designed and fabricated using a 0.13 μm mixed signal CMOS technology.The test results show that the modulator can achieve a peak SNR of 77.2 dB，which equals to a 12.5 bit resolution，and a power dissipation of 5.9 mW (6.2 mW with decimator) was occupied.

Key words: behavioral simulation, circuit imperfections, Sigma-Delta ADC

中图分类号:

TN432

张信,于敦山,盛世敏,谭志超. 一种行为级的仿真方法及Sigma-Delta模数转换器的最优化设计[J]. 北京大学学报（自然科学版）.

ZHANG Xin,YU Dunshan,SHENG Shimin,TAN Zhichao. A Behavioral Simulation Method and an Optimized Design of Sigma-Delta ADC[J]. Acta Scientiarum Naturalium Universitatis Pekinensis.

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https://xbna.pku.edu.cn/CN/Y2009/V45/I2/209