发布日期 ： 2021-01-26 06:02:49 UTC
分类 ： Electronic
<img src="http://drr.ikcest.org/static/upload/50/505b026a-eca1-11e9-9b36-00163e0618d6_m.jpg" />
This calculator calculates the bias voltage and current, as well as the gain and frequency response.
Equations
V<sub>B</sub>= VP * R2/(R1+R2)
V<sub>E</sub>= V<sub>B</sub>-V<sub>BE</sub>
I<sub>E</sub>=V<sub>E</sub>/R<sub>E</sub>
Alpha= Beta/(Beta+1)
I<sub>C</sub>= Alpha * I<sub>E</sub>
VC= VP-I<sub>C</sub> * R<sub>C</sub>/2
I<sub>B</sub>=I<sub>C</sub>/Beta
g<sub>m</sub> = I<sub>C</sub>/25mA
r<sub>e</sub>= Alpha/g<sub>m</sub>
r<sub>π</sub>= Beta/g<sub>m</sub>
A=Alpha * r<sub>π</sub> * R<sub>C</sub>/(R<sub>s</sub>+2 * r<sub>π</sub>)/r<sub>e</sub>
f<sub>P1</sub>=1/(2 * π* (Rs||2 * rπ) * (C<sub>BE</sub>/2+C<sub>CB</sub>))
f<sub>P2</sub>=1/(2 * π * R<sub>C</sub> * C<sub>CB</sub>)
f<sub>T</sub>= g<sub>m</sub>/(2π*(C<sub>BE</sub>+C<sub>CB</sub>))
R1=18KΩ，R2=3.9KΩ，R<sub>C</sub>=3KΩ，R<sub>E</sub>=3.4KΩ，VP=25V，Beta=100，V<sub>BE</sub>=0.6V，R<sub>s</sub>=50Ω，R<sub>L</sub>=470Ω，f<sub>T</sub>=400MHz，C<sub>CB</sub>=2pF
Find the result according to the formula
R1，R2R<sub>C</sub>，R<sub>E</sub>，the unit is KΩ
R<sub>s</sub>，R<sub>L</sub>，the unit isΩ