电流镜版图的八段设计方案

The Eight-segment Current Mirror Layout

主要提出一种新的电流镜版图设计方法—八段版图法,从而大大降低了电流镜对线性梯度参数的灵敏度,并对比论证了电流镜现有版图和新版图的各晶体管阈值电压对放大区梯度角的变化关系,结果表明新版图在匹配性能上远优于现有的版图设计方案。

Propose a new current mirror layout,the eight-segment layout,which reduces the matching sensitivity to the linear parameter gradients.The performances of new and existing layouts are compared for threshold voltage gradients at arbitrary angles.The results show a significant improvement in matching characteristics over with existing layout techniques.