作者cpt (post blue)
看板comm_and_RF
標題Re: Cutoff frequency~
時間Sat Jul 7 10:30:52 2007
※ 引述《bnbnnancy (無尾熊)》之銘言：
: Hi
: I got a question~
: For a 0.18um and 0.8um technology MOSFET, which has a higher cutoff frequency?
: Thanks a lot!!
To characterize high-freq performance of a technology node
we usually use the figure of merit "unity gain freq" instead
of "cutoff freq". And from its definition it shouldn't be
surprising that it improves with shrinking channel length.
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※ 發信站: 批踢踢實業坊(ptt.cc)
◆ From: 67.186.15.98
1F：推 obov:in short, cutoff freq=ft=unity gain freq 76.103.52.84 07/07 11:21
2F：→ obov:but i dunno how they measure fmax@@ 76.103.52.84 07/07 11:23
3F：→ cpt:i thought "cutoff freq" is where the gain 67.186.15.98 07/07 11:26
4F：→ cpt:starts to dop, while "ft" is where gain 67.186.15.98 07/07 11:26
5F：→ cpt:drops to zero...but whatever, should track 67.186.15.98 07/07 11:27
6F：→ cpt:each other :P fmax is where power gain=0 67.186.15.98 07/07 11:28