[問題] offset差很多..該如何調？
目標
Gain>=60dB, Unity Gain frequency>=60MHz,
Phase Margin>=45Deg, Offset<=50uV,
Dynamic Rage =+/-6.5V (for 10mv error),
Slew Rate>=80 V/us.
目前
Gain=61dB, Unity Gain frequency=102MHz,
Phase Margin>=48Deg, Offset=88muV,
Dynamic Rage =+6.5/-6V (for 10mv error),
Slew Rate= 82 /-1.5G
採用.35製程
M1 s1 In1 d1 VDD pch_hva L=1.5U W=4U
M2 s2 In2 d1 VDD pch_hva L=1.5U W=4U
M3 s1 s1 VSS VSS nch_hva L=1.5U W=10U
M4 s2 s1 VSS VSS nch_hva L=1.5U W=10U
M5 d1 g5 VDD VDD pch_hva L=1.5U W=5U
M7 u2 g5 VDD VDD pch_hva L=1.5U W=30.0U
M6 u2 s2 VSS VSS nch_hva L=1.5U W=350.0U
M8 g5 g5 VDD VDD pch_hva L=1.5U W=5U
M9 out12 g5 VDD VDD pch_hva L=1.5U W=63U
M10 out12 u2 VSS VSS nch_hva L=1.5U W=25U
I12 g5 GND 0.25mA
c1 g5 out12 2.8pf
採用此結構 圖中的size是舊的
http://i.imgur.com/yrDktPD.png
另外為何hspice和tspice的結果會差這麼多啊
途中的size放入hspice跑全部條件都過..
放pspice PM從120變負的...
懇請賜教了....QQ
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