Effects of Switch Resistances and Optimization Method on the Speed of SC Amplifier

LIANG Wei-wei; YIN Ya-dong; YAN Yue-peng

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Effects of Switch Resistances and Optimization Method on the Speed of SC Amplifier

更新时间：2026-09-04

- Effects of Switch Resistances and Optimization Method on the Speed of SC Amplifier
- Vol. 27, Issue 4, Pages: 25-28(2010)
- 作者机构：
  
  中国科学院机构微电子研究所,北京,100029
- 作者简介：
- 基金信息：
- DOI：
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- Published：2010
- 稿件说明：
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梁伟伟, 阴亚东, 阎跃鹏. 开关电阻对SC放大器速度的影响和优化方法[J]. 微电子学与计算机, 2010, 27(4): 25-28.

LIANG Wei-wei, YIN Ya-dong, YAN Yue-peng. Effects of Switch Resistances and Optimization Method on the Speed of SC Amplifier[J]. 2010, 27(4): 25-28.
梁伟伟, 阴亚东, 阎跃鹏. 开关电阻对SC放大器速度的影响和优化方法[J]. 微电子学与计算机, 2010, 27(4): 25-28. DOI：

LIANG Wei-wei, YIN Ya-dong, YAN Yue-peng. Effects of Switch Resistances and Optimization Method on the Speed of SC Amplifier[J]. 2010, 27(4): 25-28. DOI：

摘要

在开关电容 (SC) 放大器中

由于MOS开关导通电阻的存在

会对其建立速度产生影响.首先使用跨导运算放大器的一阶线性模型推导了包含开关导通电阻的开关电容放大器的闭环传输函数

通过分析极点和零点的分布

研究了放大器中不同位置开关的导通电阻对阶跃响应的影响.进而提出了一种MOS开关的优化设计方法来缩短放大器阶跃响应的建立时间.最后使用电路仿真工具验证了该方法的有效性.

Abstract

The settling speed of switched-capacitor (SC) Amplifier is affected by the resistances of MOS switches. The closed loop transfer function of SC Amplifier with switch resistances is deduced using one-pole linear model of OTA. By analyzing the positions of poles and zeroes

the effects of switch resistances in two positions on step response are researched. An optimization method of MOS switches in practical design is proposed to decrease the settling time of SC Amplifier step response. This method is verified by the simulation results.

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