北京微电子技术研究所,北京,100071
纸质出版:2020
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王盟皓, 侯训平, 陆铁军. 基于Matlab的宽带连续时间Sigma-Delta调制器设计[J]. 微电子学与计算机, 2020, 37(6): 70-74.
WANG Meng-hao, HOU Xun-ping, LU Tie-jun. Design of wide-band continuous-time sigma-delta modulator based on matlab[J]. 2020, 37(6): 70-74.
本文利用Matlab集成工具箱设计了一款单环三阶三位连续时间Sigma-Delta调制器.与离散时间调制器相比,连续时间调制器虽然对非理想因素较为敏感,但其在功耗、带宽方面却有着突出的表现.本文在设计过程中,加入了零阶反馈环路对额外环路延时进行吸收,并对连续时间调制器最主要的三种非理想特性进行了分析.最终基于65 nm CMOS工艺,设计电路并完成版图,通过spectre仿真,本文设计的调制器在10 MHz带宽下,可以达到78.20 dB的信噪失真比,且功耗仅为5.39 mW.
This paper presents a single-loop 3rd-order 4-bit Continuous-Time Sigma-Delta modulator using the Matlab toolbox. Compared with Discrete-Time modulators
continuous-time modulators are sensitive to non-ideal factors
but they have outstanding performance in terms of power consumption and bandwidth. In the design process
a zero-order feedback loop is added to absorb the excess loop delay
and the three main non-ideal factors of the continuous-time modulator are analyzed. Finally
based on the 65nm CMOS process
the circuit and layout of the modulator is completed. Through spectre simulation
the modulator can achieve 78.20dB signal to noise and distortion ratio with bandwidth of 10MHz
while the power consumption is only 5.39mW.
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