※ 引述《sovereignty (沒人能把誰的幸福)》之銘言：
: ※ 引述《elf326 (小小)》之銘言：
: : 請問各位大大,我現在用TSMC的ADS Design kit裡的spiral inductor作模擬(非momentum)
: : 要如何模擬它的Q factor 跟它的寄生串聯電阻...
: : 我曾經試過用S parameter去模擬 再用equation
: : L =imag(Z(1,1))/2*pi*freq
: : Q = imag(S(1,1))/real(S(1,1))
: : 可是跑出來的有效電感值L變成負的值(頻率在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值也相對的很小(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 是不是等效電路(是pi model嗎??)跟我的式子不符合
: : 拜託各位大大了......謝謝 ^^"
謝謝 各位大大的解答 我大概了解了 非常謝謝喔^^"
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