Design of the structure of current mirror of high accuracy
Yanan Zhang · Journal of Hefei University of Technology · 2009
The current mirror is one of the key elements in analog circuit design.In order to get better performance of analog circuits,the accuracy of the current mirror,which is one of the most important parameters,has to be assured.But with model dimension reducing,the match accuracy of current mirror's current becomes lower because of the channel length modulation effect.In this paper,the structure of a current mirror is put forth and simulated and verified by employing the model of UMC 65 nm and the Cadence's Spectre.The presented structure achieves higher accuracy and makes the partial difference due to model dimension reducing reduce to a large extent,and the demand of the circuit for high accuracy is met.