作者chrisenzo (5566)
看板Electronics
标题[问题] offset差很多..该如何调？
时间Wed Dec 3 12:42:14 2014
目标
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
采用.35制程
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
采用此结构 图中的size是旧的
http://i.imgur.com/yrDktPD.png
另外为何hspice和tspice的结果会差这麽多啊
途中的size放入hspice跑全部条件都过..
放pspice PM从120变负的...
恳请赐教了....QQ
刚温
--
※ 发信站: 批踢踢实业坊(ptt.cc), 来自: 64.106.111.22
※ 文章网址: http://webptt.com/cn.aspx?n=bbs/Electronics/M.1417581736.A.244.html
1F：推 CaskY: 我感觉很难达到50uV ? 12/03 14:12
2F：→ CaskY: mirror 出来的两个都是5/1.5 感觉有点怪怪 12/03 14:21
3F：→ CaskY: 还有为什麽你要用两次CS 12/03 14:23
4F：→ technology55: offset system offset or random offset 12/05 12:34
5F：→ technology55: 接成unity gain buffer 测offset吗? 12/05 12:35
6F：→ technology55: 还有dynamic range (10mV error)的意思是? 12/05 12:36