A size sensitivity method for interactive CMOS circuit sizing

作者：Shi, Guoyong^*; Chen, Jiajun; Tai, Andy; Lee, Frank

来源：Analog Integrated Circuits and Signal Processing, 2013, 77(2): 95-104.

DOI：10.1007/s10470-013-0143-6

• Device sizing
• EKV model
• Size sensitivity
• Symbolic computation

A new device sizing method for CMOS analog integrated circuit is proposed. This method employs graphical sensitivity curves of certain performance metric with respect to device sizes, called size sensitivity, to guide the designer to choose proper device sizes semi-automatically. It is shown that the plot of sensitivity curves in the frequency-domain can exhibit quantitative performance dependence to device sizes nearby dominant pole/zero locations. For accurate sensitivity calculation, the dependence on dc sensitivity in the computation of ac sensitivity to device size is emphasized and an EKV model-based implementation is outlined. The proposed graphical semi-automatic analog sizing methodology differentiates itself from the traditional black-box approaches with which the user has no interference in the optimization process. An interactive semi-automatic analog sizing tool with a graphical interface allows the user to decide which device sizes are more rewarding to tune. An operational amplifier is sized by using the proposed interactive tool.

• 出版日期2013-11
• 单位上海交通大学