[转]几道analog面试题

chudong · 发表于 2007-6-19 10:29:51

无奈！没有好好看过Ra~的书籍
刚开始可能还没有真正意识到这本书的重要性吧？加油了！

yzhfy · 发表于 2007-6-19 14:42:19

哇靠，看书果然有用呀~~~~~~~

marcuspan · 发表于 2007-6-19 17:09:43

6

ffset

I think it means DC offset. If the opamp gain is fairly large, than a tiny offset at input will cause the output to be saturated.
And suppose it is a two stage opamp, the offset at the output of the first stage will also saturate the second stage input.
If opamp has differential output , a common mode feedback circuit is needed to provide a stable DC operation point.

pol_sky · 发表于 2007-6-20 09:45:32

[quote][/quote]6. offset，对于一个普通的2-stage op-amp，有哪些offset （input diff pair,
}M)m'W"@|&`,a:{W$n-u;j;Qoutput of the 1st stage, etc）,在这些offset中，哪些是有major影响的，它们各自
2_eFW;Twww.eetop.cn的影响分别是什么?
谢谢上楼的回答,但在这些offset中那些是主要的影响,每一种offset怎么解决呀?谢谢!

barryarron · 发表于 2007-6-21 12:42:54

请问一下这是本科生还是研究生的面试题目呀？

zzj0329 · 发表于 2007-6-21 21:22:19

好帖啊，谢谢楼主！！！

magicdog · 发表于 2007-6-22 08:56:52

offset 主要来自2个方面

1, "system offset" The current source is not a ideal source. It's inner resister is not infinite!!

2, offset from matching 取决于layout了

pol_sky · 发表于 2007-6-22 09:51:59

I see, Thank you!

alasliu · 发表于 2007-6-23 10:29:32

提不是很难

quifei · 发表于 2007-7-15 10:41:50

还好知道一点

[转]几道analog面试题

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