[問題] gm id作圖
想請教cadence模擬技巧
最近拿到新的製程檔pdk
想跑看看gm vs id的圖
請問在cadence裡有什麼簡單有效的方法畫出這個圖並且隨W改變嗎？
gm/id vs Vgs這個圖很簡單 只要用calculator裡的func就可以畫
若是x軸要換成id 必須要另外再畫一條id的線
拉進gm vs Vgs的圖再選x軸的variable才能換成
若是單純畫gm vs "Vgs"很簡單
但換成id要手動
這種方法如果是想看多個width會很麻煩 除非用appand上去
想的另一種方法是
用一個current mirror來bias這個待測的MOS
藉著掃理想電流源來控制vgs以得到對應的id (雖然會id =\= Iref)
這樣就可以sweep id來得到gm
想請教各位.....
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