记录资料

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起振，仿真时间，10K个（1/fs）就能看到振荡，20K个就稳定振起来了

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cadence. https://community.cadence.com/ca ... -and-auto-harmonics

Simulating Crystal Oscillators is Much Easier in MMSIM12.1

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https://community.cadence.com/ca ... -and-auto-harmonics

Simulating Crystal Oscillators is Much Easier in MMSIM12.1 - Part 1

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High Power clamp cell with low V MOS

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爱爱爱爱

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corelation between Finger width and esd uniformity. The wider width, the worst uniformity
BEB etechnology to improve esd performance
active segment and CT technology to improve esd performance
ESD implant layer removement saves cost and does not reduce esd level

seperation of esd detection circuit and esd current-discharge circuit.

distributed ESD detection circuit and discharge circuit improve whole chip esd level

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大工艺节点的不均匀性严重
40nm开始不均匀性不明显了

小节点（40nm）工艺考虑trigger vol和 hold vol之间的窗口
大节点（>=90）考虑uniformity



With the process advancing from 90nm to 40nm,
GGNMOS ESD robustness decreases sharply, while trigger
voltage and holding voltage increases. So, same structure
GGNMOS implemented in 90nm as an excellent ESD
protection, will be not fit to 40nm process.


同一个工艺下，大节点，L的增加It2迅速下降
40nm，随L增加，It2下降不明显。the thin oxide
thickness becomes the constraint under 40nm process, and L is
no longer the main factor to affect the failure current.

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instructor's solution manual

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直觉