[转]几道analog面试题

hz0225

不错的题目，值得品味

THEONE

不知道现在学开来的及不？

pzhangosu

One more addition:
in PMOS mobility fluctuation due to carrier interactions with lattice fluctuation is more dominant than carrier fluctuation in NMOS. but this effect is much insignificant, which leads to less flicker noise in PMOS.  of course, if PMOS is buried-channel device, flicker noise is more dramatically reduced.

huangdo7539

thanks

markus_1

Thank you

rossbug

還不錯的題目,沒有複雜的計算,我喜歡

eric.hanyq

很强的题目呀，好像还都有印象，不过要是比较好的回答还是难呀～～～～

jjh197111

第二题
根据推导，级联放大器的噪声系数主要由前级决定，第一级应使用高增益，低噪声的电路。搞清楚噪声系数与噪声指数

睡貓

use physic viewopint to interpretate miller effect :
because the millier cap output node experience a negative -A*delta(Vin)
It means the cap  will extract  more current Cc*(1+A)*delta(Vin) than Cc*delta(Vin) for input node
That's why the effect cap is Cc(1+A).

hgdllt

好题