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一种新型共模反馈结构

A new type of common-mode feedback structure
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摘要 提出并设计了一种应用于CMOS全差分运放结构中的共模反馈电路。同传统结构的共模反馈结构相比,该结构能够使输出共模电平具有零延迟建立的特性,同时,不影响全差分运算放大器的输出摆幅,并且相较于传统结构,减少了开关数量,降低了开关电荷注入、时钟馈通,消除了初始电荷的影响。此新型共模反馈结构既有连续时间共模反馈速度较快、精度较高的优点,又有开关电容共模反馈输出摆幅大线性度好的优点。基于Cadence spectre对电路进行了仿真验证,结果表明,该结构的共模反馈具有快速的建立时间以及较大的输出摆幅。
作者 胡国林
机构地区 电子科技大学
出处 《电子产品世界》 2018年第8期58-60,共3页 Electronic Engineering & Product World
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