作者PaulRGray (Paul R. Gray)
看板Electronics
标题Re: [问题]电路等效
时间Thu Dec 8 12:01:57 2005
※ 引述《Abner7151 (屁抠最会豪洨了)》之铭言：
: ※ 引述《PaulRGray (Paul R. Gray)》之铭言：
: : equivalent circuit?
: : I guess that you mean "small-signal equivalent ckt"
: : we can use T-model to estimate this circuit
: : Collector - 10k-ohm to ground, Vc
: : passive current source gm*vbe between Collector and Base, toward Base
: : Base - 10k-ohm to ground and vi
: : re between Base and Emitter
: : Emitter - 10k-ohm to ground, Ve
: 喔喔喔 不是的
: 我的意思不是小信号等效电路
: 我是想要把基极端前面的那些电路
: 把他等效成一个电阻还有一个电压源的等效
: 可是我不知道怎麽下手 谢谢你
: 希望可以再跟我说详细一些
first of all
we can use Norton Form
Is = Vs/Rs
Current Source: 2mA , 10k in parallel
Then we can merge this Current Source and the Current source in the problem.
I' = 2mA-I
finally
use Thevenin Form
Vs = Is*Rs
Voltage Source: 20V-I*10k , 10k in series, base
--
※ 发信站: 批踢踢实业坊(ptt.cc)
◆ From: 140.112.33.209
1F：→ Abner7151:谢谢你 我懂了 12/08 12:05