猜的:
N17/N18/N8 is Long Channel for Slow ON P17 gate to Logic 0V
P13/P14/P15 is Long Channel for Slow ON N15 gate to Logic VDD.
This Circuit 是讓 P18 and N15 不要有同時打開的時間 to aviod Short Circuit Current
因為Width P18 and N15 很大,
P18 Width >> P17 Width
N15 Width >> N14 Width
這應該是 I/O Cell 的output Driver Stage,
P19 and NMOS is ESD Device,
但您的電路似乎有錯喔!
(1) R1 floarting ?
有錯誤敬請見諒