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Post time 2008-2-19 06:40:02 |Display all floors
It will take time for designers to master all this new technology, because the models that we use to simulate circuits can't easily handle 60 GHz. Today's transistor models are constructed as though all their capacitance and resistance came from small capacitors and resistors connected here and there. In reality, of course, the capacitance and resistance in these transistors are distributed over appreciable dimensions. So lumping things in this way fails to capture some important effects that manifest themselves most obviously at these high frequencies.
这种晶体管里面的电容和电阻分布在相当大的空间上?
谢谢指正!

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Post time 2008-2-19 06:58:12 |Display all floors
还是说:这种晶体管里面在相当多的空间/地方存在电容和电阻?

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Post time 2008-2-19 09:06:06 |Display all floors
It will take time for designers to master all this new technology, because the models that we use to simulate circuits can't easily handle 60 GHz. Today's transistor models are constructed as though all their capacitance and resistance came from small capacitors and resistors connected here and there. In reality, of course, the capacitance and resistance in these transistors are distributed over appreciable dimensions. So lumping things in this way fails to capture some important effects that manifest themselves most obviously at these high frequencies.
如今的晶体管模型在构建时,所有电容和电阻似乎都来自到处连接的小型电容器和电阻器。当然,这些晶体管里面的电容和电阻其实分布在相当大的空间。
1、这里的here and there到底是“到处”还是“零星”?
2、后一句话与前一句话似乎无法形成对比关系。

[ Last edited by clearwater at 2008-2-19 09:08 AM ]

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Post time 2008-2-19 11:36:26 |Display all floors
第二个
这些晶体管里面在相当多的空间/地方存在电容和电阻

这里的电容和电阻不是指 物理器件(capacitors and resistors),而是大规模集成电路在高频下产生的分布电容,分部电阻。

句中的后一句话与前一句话是形成对比关系的。
前句指现有的集成电路设计的模型已经不太能够应付(有效消除)实际集成电路中在高频下产生的分布电容等问题

here and there物理器件到处连接,而分布电容可以是零星的,但它们可以在空间上是很广的
Stay Hungry, Stay Foolish 求知若饥, 虚心若愚
www.youtube.com/watch?v=60cDHb-tvMA

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Post time 2008-2-19 11:50:12 |Display all floors
Originally posted by bxwz2004 at 2008-2-19 11:36
第二个
这些晶体管里面在相当多的空间/地方存在电容和电阻

这里的电容和电阻不是指 物理器件(capacitors and resistors),而是大规模集成电路在高频下产生的分布电容,分部电阻

句中的后一句话与前一句 ...

为什么一个是:分布电容?另一个是分部电阻呢?

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