作者fairwarning (一轮明月与蓝夜!!)
看板Grad-ProbAsk
标题[理工] [电子]-CMOS differential stage
时间Wed Nov 18 13:12:03 2009
[电路图]
http://www.wretch.cc/album/show.php?i=fairwarning&b=78&f=1172957211&p=9
【题目】
The circuit shown is a CMOS differential stage in which
the aspect ratio W/L is indicated in adjacent to the devices.
The NMOS devices have K=25uA/V^2，Vt=1.5V，VA=50V，
The PMOS devices have K=12.5uA/V^2，Vt=(-1.5)V，VA=100V，
Determine the bias currents in each transistor.
【ANS】
I1=I2=I3=I4=0.1mA
I5=I6=I7=0.2mA
I8=0.4mA
请问图中的 2/I 4/I 代表什麽意思呢?是电晶体的面积比吗?
第一次看到这种标识....不懂...
又请问电流要怎麽算呢....
先谢谢大家的解答喔...谢谢!!
--
吉他演奏曲
http://blog.xuite.net/iloveguitar/music?st=c&re=list&p=1&w=641095
--
※ 发信站: 批踢踢实业坊(ptt.cc)
◆ From: 140.117.120.229
1F：推 shinyhaung:就跟你想的一样是面积比 电流用下面的电流镜算 11/18 13:13
2F：→ fairwarning:我是想算下面右手边16.25k的电流..但还在找Vgs8的电压 11/18 13:24
3F：→ fairwarning:请问该怎麽找呢? 谢谢.. 11/18 13:25
4F：→ fairwarning:就觉得少Id与Vgs.. 11/18 13:26
5F：推 shinyhaung:右下角 I=[0-Vgs-(-10)]/16.25 =K(Vgs-Vt)^2 11/18 14:34
6F：→ fairwarning:谢谢喔..!! 11/19 08:40