AC Response Simplis vs Spectre

youshang

Q:
我現在在比較spectre和simplis AC 的差異
Spectre用ideal的model來建,預期要跟simplis一樣
但如下圖或有些許AC gain的差異
想請教是否有什麼設定會影響spectre解AC的精確度,或是simplis和spectre在解AC的方式有所不同呢?



A:
關於此一模擬差異問題，原廠工程師協助確認後回覆判斷如下，請您先參考，謝謝您；
There is not enough information to say anything  definitive about why this difference exists.

However, this is what I suspect.  I am guessing that the Spectre (or MathCad?) results are derived from an average model analysis.
SIMPLIS is not derived from an average model and it does not ignore many large signal nonlinear effects.  So, I would say that it would be safe to bet that the SIMPLIS results are more accurate than the average model results.