请问C1,C2起什么作用呀？

wansin0922 · 发表于 2005-10-24 16:13:14

顶

happyandy · 发表于 2005-10-25 17:47:42

1是防止自激的
2是个带通滤波，有助频率特性的改善

tz315 · 发表于 2005-10-25 21:30:14

滤波

flushrat · 发表于 2005-10-25 23:10:27

2不是一个一阶低通吗？
H(s)=R4/R3*1/(1+s*R4*C2)

cheungshao · 发表于 2005-10-27 17:16:58

C1提高电路工作速度，
C2限制输入信号的工作频率

lifeng1984 · 发表于 2006-5-5 21:29:47

同意 C1是反馈
C2是用来防止高频衰减失真

danielhe · 发表于 2006-5-8 13:15:43

路过

ntualex · 发表于 2006-5-8 15:30:00

Something confused, in picture 1, why do you connnect the collector of Q with emitter, if in that case, there is no voltage gain, and Miller compensation is meaningless, the transfer function is sCbe+sC1+gm, some kind of equivalent impedance, don't know what it is used for?
In picture 2, it seems like a Sansen low pass filter, not sure.