作者sovereignty (没人能把谁的幸福)
看板comm_and_RF
标题Re: [问题] ADS模拟电感的问题
时间Tue Apr 11 23:46:58 2006
※ 引述《elf326 (小小)》之铭言：
: 请问各位大大,我现在用TSMC的ADS Design kit里的spiral inductor作模拟(非momentum)
: 要如何模拟它的Q factor 跟它的寄生串联电阻...
: 我曾经试过用S parameter去模拟 再用equation
: L =imag(Z(1,1))/2*pi*freq
: Q = imag(S(1,1))/real(S(1,1))
: 可是跑出来的有效电感值L变成负的值(频率在1g~8g)
L is what is given by you, so you don't have to extract that by eq.
You can open the rf018.net file and search for keyword: spiral
inductor model, then you can find the parasitic series resistance
there. There are eqs. written into the model.
: Q值也相对的很小(大概在2~3)
That's reasonable because the quality factor of on-chip spiral
inductor without special design is quite low. You can check
published papers for that.
: 我是用RF 0.18um的model 是不是等效电路(是pi model吗??)跟我的式子不符合
: 拜托各位大大了......谢谢 ^^"
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