| 16-Bit三阶级联结构Sigma—Delta调制器的设计 |
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| 引用本文： | 李威,李开航,王亮.16-Bit三阶级联结构Sigma—Delta调制器的设计[J].现代电子技术,2010,33(4):12-15,28. |
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| 作者姓名： | 李威 李开航 王亮 |
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| 作者单位： | 厦门大学,福建,厦门,361005 |
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| 摘 要： | 设计一款可应用于压力传感器的高精度三阶2—1级联结构Sigma—delta调制器。MatlabSimulink建模仿真表明，信号带宽为500Hz，过采样率为128的情况下，该调制器信噪比高达119dB。通过对调制器非理想因数的分析，采用典型的0．35μm工艺整体实现该调制器，并用Spectre仿真，电路信噪比可达106．2dB，高于16住要求的98dB，整个调制器的功耗约为7mW。
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| 关 键 词： | Sigma—Delta调制器 Simulink行为建模 信噪比 开关电容电路 |
Design of 16-Bit Third Order Cascade Sigma-Delta Modulator |
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| LI Wei,LI Kaihang,WANG Liang.Design of 16-Bit Third Order Cascade Sigma-Delta Modulator[J].Modern Electronic Technique,2010,33(4):12-15,28. |
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| Authors: | LI Wei LI Kaihang WANG Liang |
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| Affiliation: | LI Wei,LI Kaihang,WANG Liang(Xiamen University,Xiamen,361005,China) |
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| Abstract: | A third order single bit 2-1 cascade sigma-delta modulator which can be applied to pressure sensor is presented.The sigma-delta modulator design flow contains system level and circuit level design.The oversampling ratio is 128 and signal bandwidth is 500 Hz.SNR achieves 119 dB by means of behavior modeling simulations with Matlab Simulink and exceeds 106 dB under circuit level.The whole modulator power consumption is estimated around 7 mW. |
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| Keywords: | Sigma-Delta modulator Simulink behavior modeling SNR SC circuits |
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