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首页> 外文期刊>IEEE Transactions on Automatic Control >Analytical expressions for harmonic distortion at low frequencies due to device mismatch in CMOS current mirrors
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Analytical expressions for harmonic distortion at low frequencies due to device mismatch in CMOS current mirrors

机译：CMOS电流镜中器件失配导致的低频谐波失真的解析表达式

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摘要

One of the origins of harmonic distortion in current mirrors is the inevitable mismatch between the mirror transistors. In this brief, we examine both single current mirrors and complementary class-AB current mirrors, and develop analyticalexpressions for the mismatch-induced harmonic distortion. The expressions are verified through simulations and are used for a discussion of the impact of mismatch on harmonic distortion properties of CMOS current mirrors. The distortion model is combinedwith well-known statistical models for the device mismatch in order to establish a relation between geometrical parameters, distortion, and production yield. It is found that distortion levels somewhat below 1 can be attained by carefully matching themirror transistors, but ultra-low distortion is not achievable.
机译：电流反射镜中谐波失真的原因之一是反射镜晶体管之间不可避免的不匹配。在本简报中，我们研究了单电流镜和互补AB类电流镜，并开发了失配引起的谐波失真的解析表达式。通过仿真验证了这些表达式，并用于讨论失配对CMOS电流镜谐波失真特性的影响。畸变模型与众所周知的器件失配统计模型相结合，以建立几何参数、畸变和产量之间的关系。研究发现，通过仔细匹配镜像晶体管可以达到略低于 1% 的失真水平，但无法实现超低失真。

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