[問題] Hspice、Spectre模擬差異
各位前輩好
小弟目前在作一個bandgap電路
因為實驗室剛好有spectre和hspice的tool
所以有比對一下兩個tool模擬Vbg vs Temp的圖
但是很怪的是我先用spectre設計好，把Vbg最高點調到我的溫度範圍中點
|
| * *
VBG| * *
(V)| * *
| * *
| * *
| * *
| * (By SPECTRE)
|
|__________________________________
-10 45 100
但是用同樣的netlist掛進Hspice跑卻會對不齊我上面那張圖
|
| * *
VBG| * *
(V)| *
| *
| *
| *
| * (By HSPICE)
|
|__________________________________
-10 45 100
以上電路都已經有把foundry廠 model檔裡的電容電阻檔掛入
1.為什麼同樣的netlist，同一個foundry廠的model，
(foundry廠的spice model和spectre model參數應該是都一樣的)
不同的模擬軟體會有不一樣的結果?
2.各位下線都以依據哪個模擬結果為主?請問我的模擬是要以哪個為準呢
還是bandgap電路一定要留trimming呢?
煩請高手解惑，謝謝
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